Submitted Papers
[S1] He, C., Bugdayci, B., Okwudire, C.E., 2023, "Generalized SmartScan: An Intelligent LPBF Scan Sequence Optimization Approach for 3D Part Geometries" (submitted) (preprint)
Journal Papers
[J61] Wu, P., Qian, C., Okwudire, C.E., 2024, "Design, Modeling and Feedforward Control of a Hybrid Extruder for Material Extrusion Additive Manufacturing", Additive Manufacturing. Vol. 92.(pdf)
[J60] Chou, C.-H., Qian, C., Lin, Y.-C., Awtar, S., Okwudire, C.E., 2024, "Feedforward compensation of the pose-dependent vibration of a silicon wafer handling robot". CIRP Annals (pdf)
[J59] Kim, H., Kontar, R., Okwudire, C.E., 2024, "Intelligent Feedrate Optimization using an Uncertainty-aware DigitalTwin within a Model Predictive Control Framework". IEEE Access. Vol. 12, pp. 49947-49961 (pdf)
[J58] Gupta, S., Bukhari, B.A., Barry, O., Okwudire, C.E., 2023, " Data-driven Modeling and Analysis of Nonlinear Isolated Mechanical System". Mechanical Systems and Signal Processing. Vol. 204.(pdf)
[J57] Wu, P., Qian, C., Okwudire, C.E., 2023, “Modeling and Feedforward Control of Filament Advancement and Retraction in Fused Filament Fabrication”. Additive Manufacturing. Vol. 78.(pdf)
[J56] Doddapaneni, V.V.K., Lee, K., Aysal, H.E., Paul, B.K., Pasebani, S., Sierros, K.A., Okwudire, C.E. and Chang, C.H., 2023. A Review on Progress, Challenges, and Prospects of Material Jetting of Copper and Tungsten. Nanomaterials, 13(16), p.2303. (pdf)
[J55] Kim, H., Okwudire, C.E., 2023, “Intelligent Feedrate Optimization using a Physics-based and Data-driven Digital Twin”, CIRP Annals – Manufacturing Technology. (pdf)
[J54] Chou, C.H., Duan, M. and Okwudire, C.E., 2023, "A physics-guided data-driven feedforward tracking controller for systems with unmodeled dynamics--applied to 3D printing", IEEE Access. Vol. 11, pp. 14563-14574 (pdf)
[J53] He, C., Ramani, K.S., Okwudire, C.E., 2023, "An Intelligent Scanning Strategy (SmartScan) for Improved Part Quality in Multi-Laser PBF Additive Manufacturing," Additive Manufacturing. Vol. 64. (pdf)
[J52] Edoimioya, N., Chou, C.H., Okwudire, C.E., 2022, "Vibration Compensation of Delta 3D Printer with Position-varying Dynamics using Filtered B-Splines," International Journal of Advanced Manufacturing Technology. (pdf)
[J51] Edoimioya, N., Okwudire, C.E, 2022, "A Generalized and Efficient Control-oriented Modeling Approach for Vibration-prone Delta 3D printers using Receptance Coupling," IEEE Transactions on Automation Science and Engineering. (pdf)
[J50] Aidala, S., Eichenberger, Z., Chan, N., Wilkinson, K., Okwudire, C.E., 2022, "MTouch: An Automatic Fault Detection System for Desktop FFF 3D Printers using a Contact Sensor," International Journal of Advanced Manufacturing Technology. Vol. 120, pp. 8211-8224. (pdf)
[J49] Chung, S., Chou, C.-H., Fang, X., Kontar, R.,Okwudire, C., 2022, "A Multi-stage Approach for Knowledge-guided Predictions with Application to Additive Manufacturing," IEEE Transactions on Automation Science and Engineering (TASE). (pdf)
[J48] Ramani, K.S., He, C., Tsai, Y., Okwudire, C.E., 2022,"SmartScan: An Intelligent Scanning Approach for Uniform Thermal Distribution, Reduced Residual Stresses and Deformations in PBF Additive Manufacturing," Additive Manufacturing. Vol. 52. (pdf)
[J47] Wu, P., Ramani, K.S., Okwudire, C.E., 2021, “Accurate Linear and Nonlinear Model-based Feedforward Deposition Control for Material Extrusion Additive Manufacturing,” Additive Manufacturing. Vol. 48. (pdf)
[J46] Edoimioya, N., Ramani, K.S., Okwudire, C.E., 2021, "Software Compensation of Undesirable Racking Motion of H-frame 3D Printers using Filtered B-Splines," Additive Manufacturing. Vol. 47. (pdf)
[J45] Kontar, R., Shi, N., Yue, X., Chung, S., Byon, E., Chowdhury, M., Jin, J., Kontar, W., Masoud, N., Noueihed, M., Okwudire, C.E., Raskutti, G., Saigal, R., Singh, K., and Ye, Z., 2021, "The Internet of Federated Things (IoFT)". IEEE Access. (pdf)
[J44] Tuladhar, A., Queener, C., Mondisa, J., Okwudire, C., 2021, "Informal Community Spaces, Mentoring, and Representation: Unpacking Factors that Influence African American Engineering Undergraduates," International Journal of Mentoring and Coaching in Education. Vol. 10 No. 3, pp. 317-338. (pdf)
[J43] Okwudire, C.E. & Madhyastha, H.V., 2021, "Distributed manufacturing for and by the masses." Science. Vol. 372. Issue. 6540, pp. 341-342. (pdf)
[J42] Kim, H., Okwudire, C.E., 2021, “Accurate and Computationally-Efficient Approach for Simultaneous Feedrate Optimization and Servo Error Pre-compensation of Long Toolpaths - with Application to a 3D Printer,” International Journal of Advanced Manufacturing Technology. Vol. 115, pp. 2069–2082. (pdf)
[J41] Chou, C.-H., Duan, M., & Okwudire, C. E., 2021, "A linear hybrid model for enhanced servo error pre-compensation of feed drives with unmodeled nonlinear dynamics", CIRP Annals – Manufacturing Technology. Vol. 70. Issue. 1, Pages 301-304. (pdf)
[J40] Ramani, K.S., & Okwudire, C.E., 2021,“Optimal Selection of Basis Functions for Robust Tracking Control of Uncertain Linear Systems - With Application to 3D Printing”, Transactions of ASME, Journal of Dynamic Systems, Measurement and Control. Vol.143. Issue.10, pp101006-1 to 101006-10. (pdf)
[J39] Wang, J., Dong, X., Barry, O., Okwudire, C.E., 2021, ''Friction Induced Instability and Vibration in a Precision Motion Stage with a Friction Isolator'', Journal of Vibration and Control. Vol.0(0), pp.1-15. (pdf)
[J38] Kang, D., Dong, X, Kim, H., Park, P., Okwudire, C.E., 2021, "Friction Isolated Rotary System for High-Precision Roll-to-Roll Manufacturing", Precision Engineering. Vol.68, pp. 358-364. (pdf)
[J37] Dong, X., Okwudire, C.E., 2020, "Influence of Design Parameters on the Effectiveness of Friction Isolators in Mitigating Pre-motion Friction in Mechanical Bearings", Mechatronics, Vol. 71. (pdf)
[J36] Kim, H., Okwudire, C.E., 2020, "Simultaneous Servo Error Pre-compensation and Feedrate Optimization with Tolerance Constraints using Linear Programming," International Journal of Advanced Manufacturing Technology. Vol. 109, pp. 809-821.(pdf)
[J35] Duan, M., Ramani, K.S., Okwudire, C.E., 2020, "Energy Optimal Control of an Over-actuated Hybrid Feed Drive under Variable-Frequency Disturbances - with Application to Machining," Control Engineering Practice, 100, pp. 104442.(pdf)
[J34] Ramani, K.S., Edoimioya, N., Okwudire, C.E., 2020, "A Robust Filtered Basis Functions Approach for Feedforward Tracking Control – with Application to a Vibration-Prone 3D Printer," IEEE Transactions on Mechatronics. Vol. 25, Issue. 5, pp. 2556-2564. (pdf). Selected as one of six finalists for the 2021 Best Paper in Mechatronics Award.
[J33] Okwudire, C.E., Lu, X., Kumaravelu, G., Madhyastha, H., 2020, "A Three-tier Redundant Architecture for Safe and Reliable Cloud-based CNC over Public Internet Networks," Robotics and Computer-Integrated Manufacturing. Vol.62. (pdf)
[J32] Ramani, K.S., Duan, M., Okwudire, C.E., Ulsoy, A.G., 2019, “Optimal Selection of Basis Functions for Minimum-Effort Tracking Control of Nonminimum Phase Systems Using Filtered Basis Functions," Transactions of ASME, Journal of Dynamic Systems, Measurement and Control. Vol.141, No.11, pp.111009-1 to 111009-12. (pdf)
[J31] Kırlı, A., Chen, Y., Okwudire, C.E., Ulsoy, A.G., 2019, "Torque-Vectoring-Based Backup Steering Strategy for Steer-by-Wire Systems with Vehicle Stability Control," IEEE Transactions on Vehicular Technology. Vol.68, No.8, pp.7319-7328. (pdf)
[J30] Yoon, D., Ge, X., Okwudire, C.E., 2019, "Optimal Inversion-based Iterative Learning Control for Over-Actuated Systems," IEEE Transactions on Control Systems Technology. Vol.28, Issue.5, Page 1948-1955. (pdf)
[J29] Dong, X., Okwudire, C.E., 2019, "Semi-active Joint for Ultra-precision Positioning using Sliding/Rolling Bearing," CIRP Annals of Manufacturing Technology, Vol.68, No.1, pp.385-388. (pdf)
[J28] Lin, B., Duan, M., Okwudire, C.E., Wou, J.S., 2019, "Analytical and Low-order Numerical Modeling of Ball-to-ball Contact Friction in Linear Ball Bearings and Ball Screws," Journal of Tribology, Vol. 141, No.7, pp.071401-1 to 071401-17. (pdf)
[J27] Duan, M., Okwudire, C.E., 2019, “Connections between Control Allocation and Linear Quadratic Control for Weakly Redundant Systems," Automatica, Vol.101, pp.96-102. (pdf)
[J26] Okwudire, C.E., Huggi, S., Supe, S., Huang, C., Zeng, B., 2018, “Low-Level Control of 3D Printers from the Cloud: A Step toward 3D Printer Control as a Service," Inventions, Vol. 3, No.56. (pdf)
[J25] Dong, X., Okwudire, C.E., 2018, “An Experimental Investigation of the Effects of the Compliant Joint Method on Feedback Compensation of Pre-sliding/Pre-rolling Friction," Precision Engineering, Vol.54, pp.81-90. (pdf)
[J24] Duan, M., Okwudire, C.E., 2018, “Proxy-Based Optimal Control Allocation for Dual-Input Over-Actuated Systems," IEEE/ASME Transactions on Mechatronics, Vol.12, No.2, pp.895-905. (pdf)
[J23] Lin B., Okwudire, C.E., Wou, J., 2018, "Low Order Static Load Distribution Model for Ball Screw Mechanisms including Effects of Lateral Deformation and Geometric Errors," Transactions of ASME, Journal of Mechanical Design, Vol.140, No.2, pp.022301-1 to 022301-12 (pdf)
[J22] Duan, M., Yoon, D., Okwudire, C.E., 2018, "A Limited-preview Filtered B-spline Approach to Tracking Control – with Application to Vibration-induced Error Compensation of a 3D Printer," Mechatronics, Vol. 56, pp.287-296. (pdf)
[J21] Dong, X., Liu, X., Yoon, D., Okwudire, C.E. 2017, "Simple and Robust Feedforward Compensation of Quadrant Glitches using a Compliant Joint," CIRP Annals of Manufacturing Technology, Vol.66, No.1, pp.353-356. (pdf)
[J20] Cui, L., Okwudire, C.E., Awtar, S., 2017, "Modeling Complex Non-minimum Phase Zeros in Flexure Mechanisms," Transactions of ASME, Journal of Dynamic Systems, Measurement and Control, Vol.139, No.10, pp.101001-1 to 101001-9. (pdf)
[J19] Zhang, D., Lin, B., Kirli, A., Okwudire, C.E., 2017, "Reduction of Steering Effort in the Event of EPAS Failure Using Differential Braking Assisted Steering," SAE International Journal of Transportation Safety, Vol.5, No.2. (pdf)
[J18] Dong, X., Yoon, D., Okwudire, C.E., 2017, "A Novel Approach for Mitigating the Effects of Pre-rolling/Pre-sliding Friction on the Settling Time of Rolling Bearing Nanopositioning Stages using High Frequency Vibration," Precision Engineering, Vol.47, pp.375-388. (pdf)
[J17] Lee, J., Ghasemi, A.H., Okwudire, C.E., Scruggs, J., 2017, "A Linear Feedback Control Framework for Optimally Locating Passive Vibration Isolators with Known Stiffness and Damping Parameters," Transactions of ASME, Journal of Vibration and Acoustics, Vol.139, No.1, pp.011006-1 to 011006-11. (pdf)
[J16] Ramani, K.S., Duan, M., Okwudire, C.E., Ulsoy, A.G., 2017, "Tracking Control of Linear Time-invariant Nonminimum Phase Systems using Filtered Basis Functions," Transactions of ASME, Journal of Dynamic Systems, Measurement and Control, Vol.139, No.1, pp.011001-1 to 011001-11. (pdf)
[J15] Yoon, D., Okwudire, C.E., 2016, "Active Assist Device for Simultaneous Reduction of Heat and Vibration in Precision Scanning Stages," Precision Engineering, Vol.46, pp.193-205. (pdf)
[J14] Okwudire, C.E., Ramani, K.S., Duan, M., 2016, “A Trajectory Optimization Method for Improved Tracking of Motion Commands using CNC Machines that Experience Unwanted Vibration,” CIRP Annals of Manufacturing Technology, Vol.65, No.1, pp.373-376. (pdf)
[J13] Lin, B., Okwudire, C.E., 2016, "Low-order Contact Load Distribution Model for Ball Nut Assemblies," SAE International Journal of Passenger Cars-Mechanical Systems, Vol.9, No.2, pp.535-540. (pdf)
[J12] Lee, J., Okwudire, C.E., 2016, “Reduction of Vibrations of Passively-isolated Ultra-precision Manufacturing Machines using Mode Coupling,” Precision Engineering, Vol.43, pp.164-177. (pdf)
[J11] Duan, M., Okwudire, C.E., 2016, “Energy-efficient Controller Design for a Redundantly-actuated Hybrid Feed Drive with Application to Machining,” IEEE/ASME Transactions on Mechatronics, Vol.21, No.4, pp.1822-1834. (pdf)
[J10] Duan, M., Okwudire, C.E., 2015, “Minimum-time Cornering for CNC Machines using an Optimal Control Method with NURBS Parameterization,” International Journal of Advanced Manufacturing Technology, Vol.85, No.5, pp.1405-1418. (pdf)
[J9] Yang, S., Ghasemi, A.H., Lu, X., Okwudire, C.E., 2015, “Pre-compensation of Servo Contour Errors using a Model Predictive Control Framework,” International Journal of Machine Tools and Manufacture, Vol.98, pp.50-60. (pdf)
[J8] Yoon, D., Okwudire, C.E., 2015, “Magnet Assisted Stage for Vibration and Heat Reduction in Wafer Scanning,” CIRP Annals of Manufacturing Technology, Vol.64, No.1, pp.381-384. (pdf)
[J7] Okwudire, C.E., Rodgers, J., 2013, “Design and Control of a Novel Hybrid Feed Drive for High Performance and Energy Efficient Machining,” CIRP Annals of Manufacturing Technology, Vol.62, No.1, pp.391-394. (pdf)
[J6] Okwudire, C.E., Lee, J., 2013, “Minimization of the Residual Vibrations of Ultra-precision Manufacturing Machines via Optimal Placement of Vibration Isolators,” Precision Engineering, Vol.37, No.2, pp.425-432. (pdf)
[J5] Okwudire, C.E., 2012, “Reduction of Torque-induced Bending Vibrations in Ball Screw-driven Machines via Optimal Design of the Nut,” Transactions of ASME, Journal of Mechanical Design, Vol.134, No.11, pp.111008-1 to 111008-9. (pdf)
[J4] Okwudire, C.E., 2011, “Improved Screw–nut Interface Model for High-performance Ball Screw Drives,” Transactions of ASME, Journal of Mechanical Design, Vol.133, No.4, pp.141009-1 to 141009-10. (pdf)
[J3] Okwudire, C.E., Altintas, Y., 2009, “Minimum-tracking Error Control of Flexible Ballscrew Drives using a Discrete-time Sliding Mode Controller,” Transactions of ASME, Journal of Dynamic Systems, Measurement and Control, Vol.131, No.5, pp.051006-1 to 051006-12. (pdf)
[J2] Okwudire, C.E., Altintas, Y., 2009, “Hybrid Modeling of Ball Screw Drives with Coupled Axial, Torsional and Lateral Dynamics,” Transactions of ASME, Journal of Mechanical Design, Vol.131, No.7, pp.071002-1 to 071002-9. (pdf)
[J1] Altintas, Y., Okwudire, C.E., 2009, “Dynamic Stiffness Enhancement of Direct-driven Machine Tools using Sliding Mode Control with True Disturbance Recovery,” CIRP Annals of Manufacturing Technology, Vol.58, No.1, pp.335-338. (pdf)
[J60] Chou, C.-H., Qian, C., Lin, Y.-C., Awtar, S., Okwudire, C.E., 2024, "Feedforward compensation of the pose-dependent vibration of a silicon wafer handling robot". CIRP Annals (pdf)
[J59] Kim, H., Kontar, R., Okwudire, C.E., 2024, "Intelligent Feedrate Optimization using an Uncertainty-aware DigitalTwin within a Model Predictive Control Framework". IEEE Access. Vol. 12, pp. 49947-49961 (pdf)
[J58] Gupta, S., Bukhari, B.A., Barry, O., Okwudire, C.E., 2023, " Data-driven Modeling and Analysis of Nonlinear Isolated Mechanical System". Mechanical Systems and Signal Processing. Vol. 204.(pdf)
[J57] Wu, P., Qian, C., Okwudire, C.E., 2023, “Modeling and Feedforward Control of Filament Advancement and Retraction in Fused Filament Fabrication”. Additive Manufacturing. Vol. 78.(pdf)
[J56] Doddapaneni, V.V.K., Lee, K., Aysal, H.E., Paul, B.K., Pasebani, S., Sierros, K.A., Okwudire, C.E. and Chang, C.H., 2023. A Review on Progress, Challenges, and Prospects of Material Jetting of Copper and Tungsten. Nanomaterials, 13(16), p.2303. (pdf)
[J55] Kim, H., Okwudire, C.E., 2023, “Intelligent Feedrate Optimization using a Physics-based and Data-driven Digital Twin”, CIRP Annals – Manufacturing Technology. (pdf)
[J54] Chou, C.H., Duan, M. and Okwudire, C.E., 2023, "A physics-guided data-driven feedforward tracking controller for systems with unmodeled dynamics--applied to 3D printing", IEEE Access. Vol. 11, pp. 14563-14574 (pdf)
[J53] He, C., Ramani, K.S., Okwudire, C.E., 2023, "An Intelligent Scanning Strategy (SmartScan) for Improved Part Quality in Multi-Laser PBF Additive Manufacturing," Additive Manufacturing. Vol. 64. (pdf)
[J52] Edoimioya, N., Chou, C.H., Okwudire, C.E., 2022, "Vibration Compensation of Delta 3D Printer with Position-varying Dynamics using Filtered B-Splines," International Journal of Advanced Manufacturing Technology. (pdf)
[J51] Edoimioya, N., Okwudire, C.E, 2022, "A Generalized and Efficient Control-oriented Modeling Approach for Vibration-prone Delta 3D printers using Receptance Coupling," IEEE Transactions on Automation Science and Engineering. (pdf)
[J50] Aidala, S., Eichenberger, Z., Chan, N., Wilkinson, K., Okwudire, C.E., 2022, "MTouch: An Automatic Fault Detection System for Desktop FFF 3D Printers using a Contact Sensor," International Journal of Advanced Manufacturing Technology. Vol. 120, pp. 8211-8224. (pdf)
[J49] Chung, S., Chou, C.-H., Fang, X., Kontar, R.,Okwudire, C., 2022, "A Multi-stage Approach for Knowledge-guided Predictions with Application to Additive Manufacturing," IEEE Transactions on Automation Science and Engineering (TASE). (pdf)
[J48] Ramani, K.S., He, C., Tsai, Y., Okwudire, C.E., 2022,"SmartScan: An Intelligent Scanning Approach for Uniform Thermal Distribution, Reduced Residual Stresses and Deformations in PBF Additive Manufacturing," Additive Manufacturing. Vol. 52. (pdf)
[J47] Wu, P., Ramani, K.S., Okwudire, C.E., 2021, “Accurate Linear and Nonlinear Model-based Feedforward Deposition Control for Material Extrusion Additive Manufacturing,” Additive Manufacturing. Vol. 48. (pdf)
[J46] Edoimioya, N., Ramani, K.S., Okwudire, C.E., 2021, "Software Compensation of Undesirable Racking Motion of H-frame 3D Printers using Filtered B-Splines," Additive Manufacturing. Vol. 47. (pdf)
[J45] Kontar, R., Shi, N., Yue, X., Chung, S., Byon, E., Chowdhury, M., Jin, J., Kontar, W., Masoud, N., Noueihed, M., Okwudire, C.E., Raskutti, G., Saigal, R., Singh, K., and Ye, Z., 2021, "The Internet of Federated Things (IoFT)". IEEE Access. (pdf)
[J44] Tuladhar, A., Queener, C., Mondisa, J., Okwudire, C., 2021, "Informal Community Spaces, Mentoring, and Representation: Unpacking Factors that Influence African American Engineering Undergraduates," International Journal of Mentoring and Coaching in Education. Vol. 10 No. 3, pp. 317-338. (pdf)
[J43] Okwudire, C.E. & Madhyastha, H.V., 2021, "Distributed manufacturing for and by the masses." Science. Vol. 372. Issue. 6540, pp. 341-342. (pdf)
[J42] Kim, H., Okwudire, C.E., 2021, “Accurate and Computationally-Efficient Approach for Simultaneous Feedrate Optimization and Servo Error Pre-compensation of Long Toolpaths - with Application to a 3D Printer,” International Journal of Advanced Manufacturing Technology. Vol. 115, pp. 2069–2082. (pdf)
[J41] Chou, C.-H., Duan, M., & Okwudire, C. E., 2021, "A linear hybrid model for enhanced servo error pre-compensation of feed drives with unmodeled nonlinear dynamics", CIRP Annals – Manufacturing Technology. Vol. 70. Issue. 1, Pages 301-304. (pdf)
[J40] Ramani, K.S., & Okwudire, C.E., 2021,“Optimal Selection of Basis Functions for Robust Tracking Control of Uncertain Linear Systems - With Application to 3D Printing”, Transactions of ASME, Journal of Dynamic Systems, Measurement and Control. Vol.143. Issue.10, pp101006-1 to 101006-10. (pdf)
[J39] Wang, J., Dong, X., Barry, O., Okwudire, C.E., 2021, ''Friction Induced Instability and Vibration in a Precision Motion Stage with a Friction Isolator'', Journal of Vibration and Control. Vol.0(0), pp.1-15. (pdf)
[J38] Kang, D., Dong, X, Kim, H., Park, P., Okwudire, C.E., 2021, "Friction Isolated Rotary System for High-Precision Roll-to-Roll Manufacturing", Precision Engineering. Vol.68, pp. 358-364. (pdf)
[J37] Dong, X., Okwudire, C.E., 2020, "Influence of Design Parameters on the Effectiveness of Friction Isolators in Mitigating Pre-motion Friction in Mechanical Bearings", Mechatronics, Vol. 71. (pdf)
[J36] Kim, H., Okwudire, C.E., 2020, "Simultaneous Servo Error Pre-compensation and Feedrate Optimization with Tolerance Constraints using Linear Programming," International Journal of Advanced Manufacturing Technology. Vol. 109, pp. 809-821.(pdf)
[J35] Duan, M., Ramani, K.S., Okwudire, C.E., 2020, "Energy Optimal Control of an Over-actuated Hybrid Feed Drive under Variable-Frequency Disturbances - with Application to Machining," Control Engineering Practice, 100, pp. 104442.(pdf)
[J34] Ramani, K.S., Edoimioya, N., Okwudire, C.E., 2020, "A Robust Filtered Basis Functions Approach for Feedforward Tracking Control – with Application to a Vibration-Prone 3D Printer," IEEE Transactions on Mechatronics. Vol. 25, Issue. 5, pp. 2556-2564. (pdf). Selected as one of six finalists for the 2021 Best Paper in Mechatronics Award.
[J33] Okwudire, C.E., Lu, X., Kumaravelu, G., Madhyastha, H., 2020, "A Three-tier Redundant Architecture for Safe and Reliable Cloud-based CNC over Public Internet Networks," Robotics and Computer-Integrated Manufacturing. Vol.62. (pdf)
[J32] Ramani, K.S., Duan, M., Okwudire, C.E., Ulsoy, A.G., 2019, “Optimal Selection of Basis Functions for Minimum-Effort Tracking Control of Nonminimum Phase Systems Using Filtered Basis Functions," Transactions of ASME, Journal of Dynamic Systems, Measurement and Control. Vol.141, No.11, pp.111009-1 to 111009-12. (pdf)
[J31] Kırlı, A., Chen, Y., Okwudire, C.E., Ulsoy, A.G., 2019, "Torque-Vectoring-Based Backup Steering Strategy for Steer-by-Wire Systems with Vehicle Stability Control," IEEE Transactions on Vehicular Technology. Vol.68, No.8, pp.7319-7328. (pdf)
[J30] Yoon, D., Ge, X., Okwudire, C.E., 2019, "Optimal Inversion-based Iterative Learning Control for Over-Actuated Systems," IEEE Transactions on Control Systems Technology. Vol.28, Issue.5, Page 1948-1955. (pdf)
[J29] Dong, X., Okwudire, C.E., 2019, "Semi-active Joint for Ultra-precision Positioning using Sliding/Rolling Bearing," CIRP Annals of Manufacturing Technology, Vol.68, No.1, pp.385-388. (pdf)
[J28] Lin, B., Duan, M., Okwudire, C.E., Wou, J.S., 2019, "Analytical and Low-order Numerical Modeling of Ball-to-ball Contact Friction in Linear Ball Bearings and Ball Screws," Journal of Tribology, Vol. 141, No.7, pp.071401-1 to 071401-17. (pdf)
[J27] Duan, M., Okwudire, C.E., 2019, “Connections between Control Allocation and Linear Quadratic Control for Weakly Redundant Systems," Automatica, Vol.101, pp.96-102. (pdf)
[J26] Okwudire, C.E., Huggi, S., Supe, S., Huang, C., Zeng, B., 2018, “Low-Level Control of 3D Printers from the Cloud: A Step toward 3D Printer Control as a Service," Inventions, Vol. 3, No.56. (pdf)
[J25] Dong, X., Okwudire, C.E., 2018, “An Experimental Investigation of the Effects of the Compliant Joint Method on Feedback Compensation of Pre-sliding/Pre-rolling Friction," Precision Engineering, Vol.54, pp.81-90. (pdf)
[J24] Duan, M., Okwudire, C.E., 2018, “Proxy-Based Optimal Control Allocation for Dual-Input Over-Actuated Systems," IEEE/ASME Transactions on Mechatronics, Vol.12, No.2, pp.895-905. (pdf)
[J23] Lin B., Okwudire, C.E., Wou, J., 2018, "Low Order Static Load Distribution Model for Ball Screw Mechanisms including Effects of Lateral Deformation and Geometric Errors," Transactions of ASME, Journal of Mechanical Design, Vol.140, No.2, pp.022301-1 to 022301-12 (pdf)
[J22] Duan, M., Yoon, D., Okwudire, C.E., 2018, "A Limited-preview Filtered B-spline Approach to Tracking Control – with Application to Vibration-induced Error Compensation of a 3D Printer," Mechatronics, Vol. 56, pp.287-296. (pdf)
[J21] Dong, X., Liu, X., Yoon, D., Okwudire, C.E. 2017, "Simple and Robust Feedforward Compensation of Quadrant Glitches using a Compliant Joint," CIRP Annals of Manufacturing Technology, Vol.66, No.1, pp.353-356. (pdf)
[J20] Cui, L., Okwudire, C.E., Awtar, S., 2017, "Modeling Complex Non-minimum Phase Zeros in Flexure Mechanisms," Transactions of ASME, Journal of Dynamic Systems, Measurement and Control, Vol.139, No.10, pp.101001-1 to 101001-9. (pdf)
[J19] Zhang, D., Lin, B., Kirli, A., Okwudire, C.E., 2017, "Reduction of Steering Effort in the Event of EPAS Failure Using Differential Braking Assisted Steering," SAE International Journal of Transportation Safety, Vol.5, No.2. (pdf)
[J18] Dong, X., Yoon, D., Okwudire, C.E., 2017, "A Novel Approach for Mitigating the Effects of Pre-rolling/Pre-sliding Friction on the Settling Time of Rolling Bearing Nanopositioning Stages using High Frequency Vibration," Precision Engineering, Vol.47, pp.375-388. (pdf)
[J17] Lee, J., Ghasemi, A.H., Okwudire, C.E., Scruggs, J., 2017, "A Linear Feedback Control Framework for Optimally Locating Passive Vibration Isolators with Known Stiffness and Damping Parameters," Transactions of ASME, Journal of Vibration and Acoustics, Vol.139, No.1, pp.011006-1 to 011006-11. (pdf)
[J16] Ramani, K.S., Duan, M., Okwudire, C.E., Ulsoy, A.G., 2017, "Tracking Control of Linear Time-invariant Nonminimum Phase Systems using Filtered Basis Functions," Transactions of ASME, Journal of Dynamic Systems, Measurement and Control, Vol.139, No.1, pp.011001-1 to 011001-11. (pdf)
[J15] Yoon, D., Okwudire, C.E., 2016, "Active Assist Device for Simultaneous Reduction of Heat and Vibration in Precision Scanning Stages," Precision Engineering, Vol.46, pp.193-205. (pdf)
[J14] Okwudire, C.E., Ramani, K.S., Duan, M., 2016, “A Trajectory Optimization Method for Improved Tracking of Motion Commands using CNC Machines that Experience Unwanted Vibration,” CIRP Annals of Manufacturing Technology, Vol.65, No.1, pp.373-376. (pdf)
[J13] Lin, B., Okwudire, C.E., 2016, "Low-order Contact Load Distribution Model for Ball Nut Assemblies," SAE International Journal of Passenger Cars-Mechanical Systems, Vol.9, No.2, pp.535-540. (pdf)
[J12] Lee, J., Okwudire, C.E., 2016, “Reduction of Vibrations of Passively-isolated Ultra-precision Manufacturing Machines using Mode Coupling,” Precision Engineering, Vol.43, pp.164-177. (pdf)
[J11] Duan, M., Okwudire, C.E., 2016, “Energy-efficient Controller Design for a Redundantly-actuated Hybrid Feed Drive with Application to Machining,” IEEE/ASME Transactions on Mechatronics, Vol.21, No.4, pp.1822-1834. (pdf)
[J10] Duan, M., Okwudire, C.E., 2015, “Minimum-time Cornering for CNC Machines using an Optimal Control Method with NURBS Parameterization,” International Journal of Advanced Manufacturing Technology, Vol.85, No.5, pp.1405-1418. (pdf)
[J9] Yang, S., Ghasemi, A.H., Lu, X., Okwudire, C.E., 2015, “Pre-compensation of Servo Contour Errors using a Model Predictive Control Framework,” International Journal of Machine Tools and Manufacture, Vol.98, pp.50-60. (pdf)
[J8] Yoon, D., Okwudire, C.E., 2015, “Magnet Assisted Stage for Vibration and Heat Reduction in Wafer Scanning,” CIRP Annals of Manufacturing Technology, Vol.64, No.1, pp.381-384. (pdf)
[J7] Okwudire, C.E., Rodgers, J., 2013, “Design and Control of a Novel Hybrid Feed Drive for High Performance and Energy Efficient Machining,” CIRP Annals of Manufacturing Technology, Vol.62, No.1, pp.391-394. (pdf)
[J6] Okwudire, C.E., Lee, J., 2013, “Minimization of the Residual Vibrations of Ultra-precision Manufacturing Machines via Optimal Placement of Vibration Isolators,” Precision Engineering, Vol.37, No.2, pp.425-432. (pdf)
[J5] Okwudire, C.E., 2012, “Reduction of Torque-induced Bending Vibrations in Ball Screw-driven Machines via Optimal Design of the Nut,” Transactions of ASME, Journal of Mechanical Design, Vol.134, No.11, pp.111008-1 to 111008-9. (pdf)
[J4] Okwudire, C.E., 2011, “Improved Screw–nut Interface Model for High-performance Ball Screw Drives,” Transactions of ASME, Journal of Mechanical Design, Vol.133, No.4, pp.141009-1 to 141009-10. (pdf)
[J3] Okwudire, C.E., Altintas, Y., 2009, “Minimum-tracking Error Control of Flexible Ballscrew Drives using a Discrete-time Sliding Mode Controller,” Transactions of ASME, Journal of Dynamic Systems, Measurement and Control, Vol.131, No.5, pp.051006-1 to 051006-12. (pdf)
[J2] Okwudire, C.E., Altintas, Y., 2009, “Hybrid Modeling of Ball Screw Drives with Coupled Axial, Torsional and Lateral Dynamics,” Transactions of ASME, Journal of Mechanical Design, Vol.131, No.7, pp.071002-1 to 071002-9. (pdf)
[J1] Altintas, Y., Okwudire, C.E., 2009, “Dynamic Stiffness Enhancement of Direct-driven Machine Tools using Sliding Mode Control with True Disturbance Recovery,” CIRP Annals of Manufacturing Technology, Vol.58, No.1, pp.335-338. (pdf)
Letters / Short Notes
[L1] Duan, M., Okwudire, C.E., 2016, “Correction to “Energy-efficient Controller Design for a Redundantly-actuated Hybrid Feed Drive with Application to Machining” [Aug 16 1822-1834]," IEEE/ASME Transactions on Mechatronics, Vol.21, No.6, pp.2999-3000. (Erratum/Letter). (pdf)
Magazine Articles
[M1] Ramani, K.S., Duan, M., Yoon, D., Okwudire, C.E., Ulsoy, A.G., 2018, “Boosting Speed and Accuracy in Precision Motion Control,” ASME Mechanical Engineering, Vol.140, No.9, pp.17-23. (pdf)
Conference Papers
[C69] Pereira, I. A., Edoimioya, N., Okwudire, C. E., "Vibration and Tracking Control of Industrial Robots: A Comparison between Time-Varying Filtered B-Splines and Input Shaping," 2024 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM), July 15-19, 2024, Boston, MA. (pdf)
[C68] Shirzad, S., Chou, C.-H., Versin, A., Habbal, O., Okwudire, C. E., Pannier, C. "An Investigation of the Effects of Vibration Compensation on Print Quality of High-Speed Metal Extrusion Based Additive Manufacturing." ASME 2024 International Manufacturing Science and Engineering Conference (MSEC 2024), June 17-21, 2024, Knoxville, TN. (pdf)
[C67] Ye, J., Alam, MM., Okwudire, C. E., "Brief Paper: A Preliminary Study on Depowdering of Fragile Objects Using Robots in Binder Jetting Additive Manufacturing." ASME 2024 International Manufacturing Science and Engineering Conference (MSEC 2024), June 17-21, 2024, Knoxville, TN. (pdf)
[C66] Lyu, H., Wu, P., Okwudire, C. E., "MScan: An Automated Fault Detection System for Desktop Fused Filament Fabrication 3D Printers Utilizing a Non-contact Sensor", ASME 2024 International Manufacturing Science and Engineering Conference (MSEC 2024), June 17-21, 2024, Knoxville, TN. (pdf)
[C65] Lin, Y.-C., Qian, C., Awtar, S., Okwudire, C. E., 2024, "A Preliminary Investigation of Input Shaping to Reduce the Residual Vibration of a Wafer-Handling Robot", ASME 2024 International Manufacturing Science and Engineering Conference (MSEC 2024), June 17-21, 2024, Knoxville, TN. (pdf)
[C64] He, C., Okwudire, C. E., 2023, "Scan Sequence Optimization for Reduced Residual Stress and Distortion in PBF Additive Manufacturing–An AISI 316L Case Study," Proceedings of the Ground Vehicle Systems Engineering and Technology Symposium, August 15-17, 2023, Novi, Michigan, USA. (pdf)
[C63] He, C., Okwudire, C.E., 2023, "A Versatile Point Cloud Registration Method for Quantifying Geometric Deviation in Additive Manufacturing," International Manufacturing Science and Engineering Conference, June 12-16, 2023, New Brunswick, NJ, USA. (pdf)
[C62] He, C., Ramani, K.S., Tsai, Y-L, Okwudire, C.E., 2022, "A Simplified Scan Sequence Optimization Approach for PBF Additive Manufacturing of Complex Geometries," 2022 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM), July 11-15, 2022, Sapporo, Japan. (Winner of Best Paper Award at AIM 2022). (pdf)
[C61] He, C., Tsai, Y-L., Okwudire, C.E, 2022, "Comparative Study on the Effects of an Advanced Scan Pattern and Intelligent Scan Sequence on Thermal Distribution, Part Deformation, and Printing Time in PBF Additive Manufacturing," ASME Manufacturing Science and Engineering Conference (MSEC 2022), June 17-July 1, 2022, West Lafayette, IN. (pdf)
[C60] Ramani, K.S., Okwudire, C.E., 2021, "Intelligent Online Scan Sequence Optimization for Uniform Temperature Distribution in Laser Powder Bed Fusion," ASPE Annual Meeting, November 1-5, 2021, Minneapolis, MN. (pdf)
[C59] Chou, C.-H., Duan, M., Okwudire, C. E., 2021, "A Hybrid Filtered Basis Functions Approach for Tracking Control of Linear Systems with Unmodeled Nonlinear Dynamics," International Conference on Automation Science and Engineering (CASE 2021), August 23 - 27, 2021, Lyon, France. (pdf)
[C58] Edoimioya, N., Okwudire, C.E., 2021, "An Efficient Control-oriented Modeling Approach for Vibration-prone Delta 3D printers using Receptance Coupling," International Conference on Automation Science and Engineering (CASE 2021), August 23 - 27, 2021, Lyon, France. (pdf)
[C57] Ramani, K.S., Okwudire, C.E., 2021, "Intelligent Scan Sequence Optimization for Uniform Temperature Distribution in Laser Powder Bed Fusion using a Control Theoretic Approach," Modeling, Estimation and Control Conference (MECC 2021). (pdf)
[C56] Ramani, K.S., Malekipour, E., & Okwudire, C.E., 2021, "Toward Intelligent Scan Sequence Optimization for Uniform Temperature Distribution in LPBF Additive Manufacturing," ASME Manufacturing Science and Engineering Conference (MSEC 2021), June 21 - 25, 2021, Virtual Conference. (pdf)
[C55] Ramani, K.S., Okwudire, C.E., 2020, "Two-stage Robust Tracking Controller for Linear Systems with Known Uncertainty using Filtered Basis Functions," ASME 2020 Dynamic Systems and Controls Conference (DSCC 2020), October 4 - 7, 2020, Pittsburgh, PA. (pdf)
[C54] Edoimioya, N., Ramani, K.S., Okwudire, C.E., 2020, "Software Compensation of Undesirable Racking Motion of H-frame 3D Printers using Filtered B-Splines", 2020 International Symposium on Flexible Automation (ISFA 2020), July 8-9, 2020, Virtual Conference. (pdf)
[C53] Wu, P., Ramani, K.S., Okwudire, C.E., 2020,"Robust LPV Model-Based Extrusion Control for Additive Manufacturing Using Filtered Basis Functions," 2020 International Symposium on Flexible Automation (ISFA 2020), July 8-9, 2020, Virtual Conference. (pdf)
[C52] Wu, P., Ramani, K.S., Okwudire, C.E., 2020,"Model-Based Feed-Forward Deposition Control for Additive Manufacturing," 2020 International Symposium on Flexible Automation (ISFA 2020), July 8-9, 2020, Virtual Conference. (pdf)
[C51] Ramani, K.S., Edoimioya, N., Okwudire, C.E., 2020, "A Robust Filtered Basis Functions Approach for Feedforward Tracking Control – with Application to a Vibration-Prone 3D Printer", 2020 Advanced Intelligent Mechatronics (AIM 2020), July 6-10, 2020, Virtual Conference. (pdf)
[C50] Ramani, K.S., Okwudire, C.E., 2020, "Optimal Selection of Basis Functions for Robust Tracking Control of Linear Systems using Filtered Basis Functions", American Control Conference (ACC 2020), July 1-3, 2020, Denver, CO. (pdf)
[C49] Kim, H., Okwudire, C.E., 2020, "Combined Feedforward Tracking Control and Feedrate Optimization - with Application to a Precision Motion Stage", ASPE 2020 Spring, May 6-May 8, 2020, Virtual Conference.
[C48] Okwudire, C.E., 2020, "Advanced Feedforward Control as a Service from the Cloud", ASPE 2020 Spring, May 6-May 8, 2020, Virtual Conference. (pdf)
[C47] Madhyastha, H.V., Okwudire, C.E., 2020, "Remotely Controlled Manufacturing: A New Frontier for Systems Research," ACM, March 3-4, 2020, Austion, TX. (pdf)
[C46] Kang, D., Dong, X., Kim, H., Park, P., Okwudire, C.E., 2019, "Friction Isolated Rotary System for High-precision Roll-to-roll Manufacturing," 2019 ASPE Annual Meeting, October 28-November 1, 2019, Pittsburgh, PA. (pdf)
[C45] Dong, X., Okwudire, C.E., Wang, J., Barry, O., "On the Friction Isolator for Precision Motion Control and Its Dynamics," International Design Engineering Technical Conferences & Computers and Information in Engineering Conference (IDETC/CIE 2019), August 18-21, 2019, Anaheim, CA. (pdf)
[C44] Lu, X., Kumaravelu, G., Okwudire, C.E., "An Evaluation of Data Size Reduction Techniques for Improving the Reliability of Cloud-based Control of a 3D Printer," 47th North American Research Conference (NAMRC 2019), June 10-14, 2019, Erie, PA. (pdf)
[C43] Edoimioya, N., Ramani, K.S., Okwudire, C.E., 2019, "Simultaneous Vibration Error Compensation and Feedrate Optimization using Filtered B-splines," 8th International Conference on Virtual Machining Process Technology (VMPT 2019), April 23-25, 2019, Vancouver, British Columbia, Canada.
[C42] Lin, B., Wou J., Okwudire, C.E., 2019, "Modeling Static Load Distribution and Friction of Ball Bearings and BNAs: Towards Understanding the "Stick Slip" of Rack EPAS," SAE 2019 World Congress and Exhibition, April 9-11, 2019, Detroit, MI. (Selected as one of Top 10 technical papers of SAE 2019 World Congress and Exhibition). (pdf)
[C41] Lin, B., Duan, M., Okwudire, C.E., Wou, J.S., "An improved analytical model of friction and ball motion in linear ball bearings – with application to ball-to-ball contact prediction," ASME International Mechanical Engineering Congress and Exposition (IMECE 2018), November 9-15, 2018, Pittsburgh, PA. (pdf)
[C40] Yoon, D., Okwudire, C.E., 2018, "Reference Trajectory Generation of Decouplable Coarse-fine Stage for Point-to-point Positioning Applications," 2018 ASPE Annual Meeting, November 4-November 9, 2018, Las Vegas, NV. (pdf)
[C39] Dong, X., Okwudire, C.E., 2018, "A Novel Semi-active Joint for Simultaneously Achieving Fast Settling and Excellent In-position Stability in Point-to-point Positioning," 2018 ASPE Annual Meeting, November 4-November 9, 2018, Las Vegas, NV. (pdf)
[C38] Ramani, K.S., Okwudire, C.E., 2018, "Robust filtered basis functions approach for feedforward tracking control," ASME 2018 Dynamic Systems and Controls Conference (DSCC 2018), September 30-October 3, Atlanta, GA. (pdf)
[C37] Ramani, K.S., Duan, M., Okwudire, C.E., Ulsoy, A.G., 2018, "A lifted domain-based metric for performance evaluation of LTI and LTV discrete-time tracking controllers," 2018 International Symposium on Flexible Automation (ISFA 2018), July 15-19, 2018, Kanazawa, Japan. (pdf)
[C36] Lin, B., Duan, M., Okwudire, C.E., Wou, J., 2017, "A Simplified Analytical Modeling of Rolling/Sliding Behavior and Friction in Four-point-contact Ball Bearings and Screws," ASME International Mechanical Engineering Congress and Exposition (IMECE 2017), November 3-9, 2017, Tampa, FL. (pdf)
[C35] Yoon, D., Zeng, B., Okwudire, C.E., 2017, "Decouplable Coarse-fine Stage for Improved Pre-motion and Efficiency in Point-to-point Positioning," 2017 ASPE Annual Meeting, October 29-November 3, 2017, Charlotte, NC. (pdf)
[C34] Dong, X., Okwudire, C.E., 2017, "Detailed Experimental Evaluation of the Compliant Joint Method for Feedforward Compensation of Pre-motion Friction," 2017 ASPE Annual Meeting, October 29-November 3, 2017, Charlotte, NC. (pdf)
[C33] Duan, M., Okwudire, C.E., 2017, "Proxy-based Energy Optimal Dynamic Control Allocation for Multi-input, Multi-output Over-actuated Systems," ASME 2017 Dynamic Systems and Controls Conference (DSCC 2017), October 11-13, 2017, Tysons, VA. (pdf)
[C32] Yoon, D., Duan, M., Okwudire, C.E., 2017, "Software-based Compensation of Vibration-induced Errors of a Commercial Desktop 3D Printer," 6th International Conference on Virtual Machining Process Technology (VMPT 2017), May 29-June 2, 2017, Montreal, Canada. (pdf)
[C31] Zhang, D., Lin, B., Kirli, A., Okwudire, C.E., 2017, "Reduction of Steering Effort in the Event of EPAS Failure Using Differential Braking Assisted Steering," SAE 2017 World Congress and Exhibition, April 4-6, 2017, Detroit, MI. (pdf)
[C30] Yoon, D., Okwudire, C.E., 2016, "Mitigation of Residual Vibration in Precision Scanning Stages Using Assist Devices," 2016 ASPE Annual Meeting, October 23-28, 2016, Portland, OR. (pdf)
[C29] Dong, X., Liu, X., Yoon, D., Okwudire, C.E., 2016, "Design and Analysis of a Compliant Joint for Mitigating the Nonlinear Friction in Roller Bearing Motion Stages," 2016 ASPE Annual Meeting, October 23-28, 2016, Portland, OR.
[C28] Cui, L., Okwudire, C.E., Awtar, S., 2016, "Complex Non-minimum Phase Zeros in the Dynamics of Double Parallelogram Flexure Module based Flexure Mechanisms," ASME 2016 Dynamic Systems and Controls Conference (DSCC 2016), October 12-14, 2016, Minneapolis, MN. (Winner of Best Student Paper Award at DSCC 2016 and DSCD Best Conference Paper in Mechatronics). (pdf)
[C27] Ramani, K.S., Okwudire, C.E., 2016, "Regularized Filtered Basis Functions Approach for Accurate Tracking of Discrete-time LTI Systems with Bounded Random Uncertainties," ASME 2016 Dynamic Systems and Controls Conference (DSCC 2016), October 12-14, 2016, Minneapolis, MN. (pdf)
[C26] Duan, M., Okwudire, C.E., 2016, "Near Energy Optimal Control Allocation for Dual-input Over-actuated Systems," ASME 2016 Dynamic Systems and Controls Conference (DSCC 2016), October 12-14, 2016, Minneapolis, MN. (pdf)
[C25] Ramani, K.S., Okwudire, C.E., 2016, "A Comparison of Two Methods for Energy Efficient Tracking Control using Filtered Basis Functions," 2016 International Symposium on Flexible Automation (ISFA 2016), August 1-3, 2016, Cleveland, OH. (pdf)
[C24] Duan, M., Okwudire, C.E., 2016, "Modeling and Observer-based Compensation of Slip in a Friction Drive for Servo Positioning," 2016 International Symposium on Flexible Automation (ISFA 2016), August 1-3, 2016, Cleveland, OH. (pdf)
[C23] Ramani, K.S., Okwudire, C.E., 2016, "Contouring Control of Feed Drive Systems using Filtered B-splines," 5th International Conference on Virtual Machining Process Technology (VMPT 2016), May 22-25, 2016, Taipei, Taiwan.
[C22] Dong, X., Yoon, Liu, X., D., Okwudire, C.E., 2016, "Mitigation of Nonlinear Friction in Roller Bearing Motion Stages Using Compliant Joints," ASPE 2016 Spring Topical Meeting - Precision Mechatronic System Design and Control, April 20-22, Cambridge, MA. (pdf)
[C21] Yoon, D., Ramani, K., Okwudire, C.E., 2016, "Optimal Control of a Magnet Assisted Scanning Stage Considering the Machine Dynamics via Filtered Basis Functions," ASPE 2016 Spring Topical Meeting - Precision Mechatronic System Design and Control, April 20-22, Cambridge, MA. (pdf)
[C20] Lin, B., Okwudire, C.E., 2016, “Low-order Contact Load Distribution Model for Ball Nut Assemblies,” SAE 2016 World Congress and Exhibition, April 12-14, 2016, Detroit, MI. (pdf)
[C19] Duan, M., Ramani, K.S., Okwudire, C.E., 2015, “Tracking Control of Non-minimum Phase Systems using Filtered Basis Functions: A NURBS-based Approach,” ASME 2015 Dynamic Systems and Control Conference (DSCC 2015), October 28-30, 2015, Columbus, OH. (Winner of Best Student Paper Award at DSCC 2015). (pdf)
[C18] Ghasemi, A.H., Lee, J., Okwudire, C.E., 2015, “A Control Theoretic Framework for Optimally Locating Passive Vibration Isolators to Minimize Residual Vibration,” ASME 2015 Dynamic Systems and Control Conference (DSCC 2015), October 28-30, 2015, Columbus, OH. (pdf)
[C17] Yoon, D., Okwudire, C.E., 2015, “Active Assist Device for Heat and Vibration Reduction in Precision Scanning Stages,” 2015 ASPE Annual Meeting, November 1-6, 2015, Austin, TX. (pdf)
[C16] Dong. X, Zhang, X., Okwudire, C.E., 2015, “ A Novel Approach for Reducing the Settling Time of Roller Bearing Nanopositioning Stages using High Frequency Vibration,” 2015 ASPE Annual Meeting, November 1-6, 2015, Austin, TX. (Winner of Best Oral Presentation Award at ASPE 2015). (pdf)
[C15] Duan, M., Okwudire, C.E., 2015, “Energy Efficiency and Performance Optimized Control of a Hybrid Feed Drive,” ASME 2015 International Manufacturing Science and Engineering Conference (MSEC 2015), June 8-12, 2015, Charlotte, NC. (pdf)
[C14] Yoon, D., Pan, Y., Okwudire, C.E., 2014, “Magnet Assisted Stage for Efficient Wafer Scanning,” ASPE 2014 Annual Meeting, November 9-14, 2014, Boston, MA. (pdf)
[C13] Duan, M., Okwudire, C.E., 2014, “Minimum-time Cornering for Manufacturing Machines using Optimal Control,” ASME 2014 Dynamic Systems and Control Conference (DSCC 2014), October 22-24, 2014, San Antonio, TX. (pdf)
[C12] Lee, J., Okwudire, C.E., 2014, “Effects of Non-proportional Damping on the Residual Vibrations of Mode-coupled Ultra-precision Manufacturing Machines,” ASME 2014 Dynamic Systems and Control Conference (DSCC 2014), October 22-24, 2014, San Antonio, TX. (pdf)
[C11] Bağdatlı, S.M., Okwudire, C.E., Ulsoy, A.G., 2014, “Linear Quadratic Design of Passive Vibration Isolators,” ASME 2014 Dynamic Systems and Control Conference (DSCC 2014), October 22-24, 2014, San Antonio, TX. (pdf)
[C10] Kale, S., Dancholvichit, N., Okwudire, C.E., 2014, “Comparative LCA of a Linear Motor and Hybrid Feed Drive under High Cutting Loads,” 6th CIRP High Performance Cutting Conference, June 23-25, 2014, Berkeley, CA. (pdf)
[C9] Lin, C.-R., Chen, B., Okwudire, C.E., 2014, “Reduction of Rapid Positioning Time by Reference Path Modification: A Preliminary Investigation,” ASME 2014 International Manufacturing Science and Engineering Conference (MSEC 2014), June 9-13, 2014, Detroit, MI. (pdf)
[C8] Lee, J., Okwudire, C.E., 2013, “Optimal Damping for the Reduction of Residual Vibrations in Ultra-precision Manufacturing Machines,” ASPE 2013 Annual Meeting, October 20-25, 2013, St. Paul, MN. (pdf)
[C7] Okwudire, C.E., Lee, J., 2013, “Optimal Motor Location for the Reduction of Residual Vibrations in Mode-coupled Ultra-precision Manufacturing Machines,” ASME 2013 International Manufacturing Science and Engineering Conference (MSEC 2013), June 10-14, 2013, Madison, WI. (pdf)
[C6] Okwudire, C.E., Kim, C.-J., Kim, J., 2012, “Reduction of the Vibrations of Ultra-precision Manufacturing Machines via Mode Coupling,” ASPE 2012 Annual Meeting, October 21-26, 2012, San Diego, CA. (pdf)
[C5] Okwudire, C.E., Peng, Z., 2012, “Reduction of Vibrations in Ball Screw Driven Machine Tools by the Optimal Selection of Nut Parameters,” ASME 2012 International Manufacturing Science and Engineering Conference (MSEC 2012), June 4-8, 2012, Notre Dame, IN. (pdf)
[C4] Okwudire, C., 2012, “A Study on the Effects of Isolator, Motor and Work Surface Heights on the Vibrations of Ultra-precision Machine Tools,” 7th International Conference on Micro Manufacturing (ICOMM 2012), March 12-14, 2012, Evanston, IL. (pdf)
[C3] Okwudire, C.E., Altintas, Y., 2008, “Effective Control of Direct Drives using a Disturbance Adaptive Discrete-time Sliding Mode Controller,” 3rd CIRP High Performance Cutting Conference, June 12-13, 2008, Dublin, Ireland. (pdf)
[C2] Okwudire, C.E., Altintas, Y., 2008, “Effective Simulation of Ballscrew Drives Modeled using Finite Element Methods,” ASME International Mechanical Engineering Congress and Exposition (IMECE 2008), October 31-November 6, 2008, Boston, MA. (pdf)
[C1] Okwudire, C.E., Altintas, Y., 2007, “Modeling of the Screw-nut Interface Dynamics of Ballscrew Drives,” ASME International Mechanical Engineering Congress and Exposition (IMECE 2007), November 11-15, 2007, Seattle, WA. (pdf)
[C68] Shirzad, S., Chou, C.-H., Versin, A., Habbal, O., Okwudire, C. E., Pannier, C. "An Investigation of the Effects of Vibration Compensation on Print Quality of High-Speed Metal Extrusion Based Additive Manufacturing." ASME 2024 International Manufacturing Science and Engineering Conference (MSEC 2024), June 17-21, 2024, Knoxville, TN. (pdf)
[C67] Ye, J., Alam, MM., Okwudire, C. E., "Brief Paper: A Preliminary Study on Depowdering of Fragile Objects Using Robots in Binder Jetting Additive Manufacturing." ASME 2024 International Manufacturing Science and Engineering Conference (MSEC 2024), June 17-21, 2024, Knoxville, TN. (pdf)
[C66] Lyu, H., Wu, P., Okwudire, C. E., "MScan: An Automated Fault Detection System for Desktop Fused Filament Fabrication 3D Printers Utilizing a Non-contact Sensor", ASME 2024 International Manufacturing Science and Engineering Conference (MSEC 2024), June 17-21, 2024, Knoxville, TN. (pdf)
[C65] Lin, Y.-C., Qian, C., Awtar, S., Okwudire, C. E., 2024, "A Preliminary Investigation of Input Shaping to Reduce the Residual Vibration of a Wafer-Handling Robot", ASME 2024 International Manufacturing Science and Engineering Conference (MSEC 2024), June 17-21, 2024, Knoxville, TN. (pdf)
[C64] He, C., Okwudire, C. E., 2023, "Scan Sequence Optimization for Reduced Residual Stress and Distortion in PBF Additive Manufacturing–An AISI 316L Case Study," Proceedings of the Ground Vehicle Systems Engineering and Technology Symposium, August 15-17, 2023, Novi, Michigan, USA. (pdf)
[C63] He, C., Okwudire, C.E., 2023, "A Versatile Point Cloud Registration Method for Quantifying Geometric Deviation in Additive Manufacturing," International Manufacturing Science and Engineering Conference, June 12-16, 2023, New Brunswick, NJ, USA. (pdf)
[C62] He, C., Ramani, K.S., Tsai, Y-L, Okwudire, C.E., 2022, "A Simplified Scan Sequence Optimization Approach for PBF Additive Manufacturing of Complex Geometries," 2022 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM), July 11-15, 2022, Sapporo, Japan. (Winner of Best Paper Award at AIM 2022). (pdf)
[C61] He, C., Tsai, Y-L., Okwudire, C.E, 2022, "Comparative Study on the Effects of an Advanced Scan Pattern and Intelligent Scan Sequence on Thermal Distribution, Part Deformation, and Printing Time in PBF Additive Manufacturing," ASME Manufacturing Science and Engineering Conference (MSEC 2022), June 17-July 1, 2022, West Lafayette, IN. (pdf)
[C60] Ramani, K.S., Okwudire, C.E., 2021, "Intelligent Online Scan Sequence Optimization for Uniform Temperature Distribution in Laser Powder Bed Fusion," ASPE Annual Meeting, November 1-5, 2021, Minneapolis, MN. (pdf)
[C59] Chou, C.-H., Duan, M., Okwudire, C. E., 2021, "A Hybrid Filtered Basis Functions Approach for Tracking Control of Linear Systems with Unmodeled Nonlinear Dynamics," International Conference on Automation Science and Engineering (CASE 2021), August 23 - 27, 2021, Lyon, France. (pdf)
[C58] Edoimioya, N., Okwudire, C.E., 2021, "An Efficient Control-oriented Modeling Approach for Vibration-prone Delta 3D printers using Receptance Coupling," International Conference on Automation Science and Engineering (CASE 2021), August 23 - 27, 2021, Lyon, France. (pdf)
[C57] Ramani, K.S., Okwudire, C.E., 2021, "Intelligent Scan Sequence Optimization for Uniform Temperature Distribution in Laser Powder Bed Fusion using a Control Theoretic Approach," Modeling, Estimation and Control Conference (MECC 2021). (pdf)
[C56] Ramani, K.S., Malekipour, E., & Okwudire, C.E., 2021, "Toward Intelligent Scan Sequence Optimization for Uniform Temperature Distribution in LPBF Additive Manufacturing," ASME Manufacturing Science and Engineering Conference (MSEC 2021), June 21 - 25, 2021, Virtual Conference. (pdf)
[C55] Ramani, K.S., Okwudire, C.E., 2020, "Two-stage Robust Tracking Controller for Linear Systems with Known Uncertainty using Filtered Basis Functions," ASME 2020 Dynamic Systems and Controls Conference (DSCC 2020), October 4 - 7, 2020, Pittsburgh, PA. (pdf)
[C54] Edoimioya, N., Ramani, K.S., Okwudire, C.E., 2020, "Software Compensation of Undesirable Racking Motion of H-frame 3D Printers using Filtered B-Splines", 2020 International Symposium on Flexible Automation (ISFA 2020), July 8-9, 2020, Virtual Conference. (pdf)
[C53] Wu, P., Ramani, K.S., Okwudire, C.E., 2020,"Robust LPV Model-Based Extrusion Control for Additive Manufacturing Using Filtered Basis Functions," 2020 International Symposium on Flexible Automation (ISFA 2020), July 8-9, 2020, Virtual Conference. (pdf)
[C52] Wu, P., Ramani, K.S., Okwudire, C.E., 2020,"Model-Based Feed-Forward Deposition Control for Additive Manufacturing," 2020 International Symposium on Flexible Automation (ISFA 2020), July 8-9, 2020, Virtual Conference. (pdf)
[C51] Ramani, K.S., Edoimioya, N., Okwudire, C.E., 2020, "A Robust Filtered Basis Functions Approach for Feedforward Tracking Control – with Application to a Vibration-Prone 3D Printer", 2020 Advanced Intelligent Mechatronics (AIM 2020), July 6-10, 2020, Virtual Conference. (pdf)
[C50] Ramani, K.S., Okwudire, C.E., 2020, "Optimal Selection of Basis Functions for Robust Tracking Control of Linear Systems using Filtered Basis Functions", American Control Conference (ACC 2020), July 1-3, 2020, Denver, CO. (pdf)
[C49] Kim, H., Okwudire, C.E., 2020, "Combined Feedforward Tracking Control and Feedrate Optimization - with Application to a Precision Motion Stage", ASPE 2020 Spring, May 6-May 8, 2020, Virtual Conference.
[C48] Okwudire, C.E., 2020, "Advanced Feedforward Control as a Service from the Cloud", ASPE 2020 Spring, May 6-May 8, 2020, Virtual Conference. (pdf)
[C47] Madhyastha, H.V., Okwudire, C.E., 2020, "Remotely Controlled Manufacturing: A New Frontier for Systems Research," ACM, March 3-4, 2020, Austion, TX. (pdf)
[C46] Kang, D., Dong, X., Kim, H., Park, P., Okwudire, C.E., 2019, "Friction Isolated Rotary System for High-precision Roll-to-roll Manufacturing," 2019 ASPE Annual Meeting, October 28-November 1, 2019, Pittsburgh, PA. (pdf)
[C45] Dong, X., Okwudire, C.E., Wang, J., Barry, O., "On the Friction Isolator for Precision Motion Control and Its Dynamics," International Design Engineering Technical Conferences & Computers and Information in Engineering Conference (IDETC/CIE 2019), August 18-21, 2019, Anaheim, CA. (pdf)
[C44] Lu, X., Kumaravelu, G., Okwudire, C.E., "An Evaluation of Data Size Reduction Techniques for Improving the Reliability of Cloud-based Control of a 3D Printer," 47th North American Research Conference (NAMRC 2019), June 10-14, 2019, Erie, PA. (pdf)
[C43] Edoimioya, N., Ramani, K.S., Okwudire, C.E., 2019, "Simultaneous Vibration Error Compensation and Feedrate Optimization using Filtered B-splines," 8th International Conference on Virtual Machining Process Technology (VMPT 2019), April 23-25, 2019, Vancouver, British Columbia, Canada.
[C42] Lin, B., Wou J., Okwudire, C.E., 2019, "Modeling Static Load Distribution and Friction of Ball Bearings and BNAs: Towards Understanding the "Stick Slip" of Rack EPAS," SAE 2019 World Congress and Exhibition, April 9-11, 2019, Detroit, MI. (Selected as one of Top 10 technical papers of SAE 2019 World Congress and Exhibition). (pdf)
[C41] Lin, B., Duan, M., Okwudire, C.E., Wou, J.S., "An improved analytical model of friction and ball motion in linear ball bearings – with application to ball-to-ball contact prediction," ASME International Mechanical Engineering Congress and Exposition (IMECE 2018), November 9-15, 2018, Pittsburgh, PA. (pdf)
[C40] Yoon, D., Okwudire, C.E., 2018, "Reference Trajectory Generation of Decouplable Coarse-fine Stage for Point-to-point Positioning Applications," 2018 ASPE Annual Meeting, November 4-November 9, 2018, Las Vegas, NV. (pdf)
[C39] Dong, X., Okwudire, C.E., 2018, "A Novel Semi-active Joint for Simultaneously Achieving Fast Settling and Excellent In-position Stability in Point-to-point Positioning," 2018 ASPE Annual Meeting, November 4-November 9, 2018, Las Vegas, NV. (pdf)
[C38] Ramani, K.S., Okwudire, C.E., 2018, "Robust filtered basis functions approach for feedforward tracking control," ASME 2018 Dynamic Systems and Controls Conference (DSCC 2018), September 30-October 3, Atlanta, GA. (pdf)
[C37] Ramani, K.S., Duan, M., Okwudire, C.E., Ulsoy, A.G., 2018, "A lifted domain-based metric for performance evaluation of LTI and LTV discrete-time tracking controllers," 2018 International Symposium on Flexible Automation (ISFA 2018), July 15-19, 2018, Kanazawa, Japan. (pdf)
[C36] Lin, B., Duan, M., Okwudire, C.E., Wou, J., 2017, "A Simplified Analytical Modeling of Rolling/Sliding Behavior and Friction in Four-point-contact Ball Bearings and Screws," ASME International Mechanical Engineering Congress and Exposition (IMECE 2017), November 3-9, 2017, Tampa, FL. (pdf)
[C35] Yoon, D., Zeng, B., Okwudire, C.E., 2017, "Decouplable Coarse-fine Stage for Improved Pre-motion and Efficiency in Point-to-point Positioning," 2017 ASPE Annual Meeting, October 29-November 3, 2017, Charlotte, NC. (pdf)
[C34] Dong, X., Okwudire, C.E., 2017, "Detailed Experimental Evaluation of the Compliant Joint Method for Feedforward Compensation of Pre-motion Friction," 2017 ASPE Annual Meeting, October 29-November 3, 2017, Charlotte, NC. (pdf)
[C33] Duan, M., Okwudire, C.E., 2017, "Proxy-based Energy Optimal Dynamic Control Allocation for Multi-input, Multi-output Over-actuated Systems," ASME 2017 Dynamic Systems and Controls Conference (DSCC 2017), October 11-13, 2017, Tysons, VA. (pdf)
[C32] Yoon, D., Duan, M., Okwudire, C.E., 2017, "Software-based Compensation of Vibration-induced Errors of a Commercial Desktop 3D Printer," 6th International Conference on Virtual Machining Process Technology (VMPT 2017), May 29-June 2, 2017, Montreal, Canada. (pdf)
[C31] Zhang, D., Lin, B., Kirli, A., Okwudire, C.E., 2017, "Reduction of Steering Effort in the Event of EPAS Failure Using Differential Braking Assisted Steering," SAE 2017 World Congress and Exhibition, April 4-6, 2017, Detroit, MI. (pdf)
[C30] Yoon, D., Okwudire, C.E., 2016, "Mitigation of Residual Vibration in Precision Scanning Stages Using Assist Devices," 2016 ASPE Annual Meeting, October 23-28, 2016, Portland, OR. (pdf)
[C29] Dong, X., Liu, X., Yoon, D., Okwudire, C.E., 2016, "Design and Analysis of a Compliant Joint for Mitigating the Nonlinear Friction in Roller Bearing Motion Stages," 2016 ASPE Annual Meeting, October 23-28, 2016, Portland, OR.
[C28] Cui, L., Okwudire, C.E., Awtar, S., 2016, "Complex Non-minimum Phase Zeros in the Dynamics of Double Parallelogram Flexure Module based Flexure Mechanisms," ASME 2016 Dynamic Systems and Controls Conference (DSCC 2016), October 12-14, 2016, Minneapolis, MN. (Winner of Best Student Paper Award at DSCC 2016 and DSCD Best Conference Paper in Mechatronics). (pdf)
[C27] Ramani, K.S., Okwudire, C.E., 2016, "Regularized Filtered Basis Functions Approach for Accurate Tracking of Discrete-time LTI Systems with Bounded Random Uncertainties," ASME 2016 Dynamic Systems and Controls Conference (DSCC 2016), October 12-14, 2016, Minneapolis, MN. (pdf)
[C26] Duan, M., Okwudire, C.E., 2016, "Near Energy Optimal Control Allocation for Dual-input Over-actuated Systems," ASME 2016 Dynamic Systems and Controls Conference (DSCC 2016), October 12-14, 2016, Minneapolis, MN. (pdf)
[C25] Ramani, K.S., Okwudire, C.E., 2016, "A Comparison of Two Methods for Energy Efficient Tracking Control using Filtered Basis Functions," 2016 International Symposium on Flexible Automation (ISFA 2016), August 1-3, 2016, Cleveland, OH. (pdf)
[C24] Duan, M., Okwudire, C.E., 2016, "Modeling and Observer-based Compensation of Slip in a Friction Drive for Servo Positioning," 2016 International Symposium on Flexible Automation (ISFA 2016), August 1-3, 2016, Cleveland, OH. (pdf)
[C23] Ramani, K.S., Okwudire, C.E., 2016, "Contouring Control of Feed Drive Systems using Filtered B-splines," 5th International Conference on Virtual Machining Process Technology (VMPT 2016), May 22-25, 2016, Taipei, Taiwan.
[C22] Dong, X., Yoon, Liu, X., D., Okwudire, C.E., 2016, "Mitigation of Nonlinear Friction in Roller Bearing Motion Stages Using Compliant Joints," ASPE 2016 Spring Topical Meeting - Precision Mechatronic System Design and Control, April 20-22, Cambridge, MA. (pdf)
[C21] Yoon, D., Ramani, K., Okwudire, C.E., 2016, "Optimal Control of a Magnet Assisted Scanning Stage Considering the Machine Dynamics via Filtered Basis Functions," ASPE 2016 Spring Topical Meeting - Precision Mechatronic System Design and Control, April 20-22, Cambridge, MA. (pdf)
[C20] Lin, B., Okwudire, C.E., 2016, “Low-order Contact Load Distribution Model for Ball Nut Assemblies,” SAE 2016 World Congress and Exhibition, April 12-14, 2016, Detroit, MI. (pdf)
[C19] Duan, M., Ramani, K.S., Okwudire, C.E., 2015, “Tracking Control of Non-minimum Phase Systems using Filtered Basis Functions: A NURBS-based Approach,” ASME 2015 Dynamic Systems and Control Conference (DSCC 2015), October 28-30, 2015, Columbus, OH. (Winner of Best Student Paper Award at DSCC 2015). (pdf)
[C18] Ghasemi, A.H., Lee, J., Okwudire, C.E., 2015, “A Control Theoretic Framework for Optimally Locating Passive Vibration Isolators to Minimize Residual Vibration,” ASME 2015 Dynamic Systems and Control Conference (DSCC 2015), October 28-30, 2015, Columbus, OH. (pdf)
[C17] Yoon, D., Okwudire, C.E., 2015, “Active Assist Device for Heat and Vibration Reduction in Precision Scanning Stages,” 2015 ASPE Annual Meeting, November 1-6, 2015, Austin, TX. (pdf)
[C16] Dong. X, Zhang, X., Okwudire, C.E., 2015, “ A Novel Approach for Reducing the Settling Time of Roller Bearing Nanopositioning Stages using High Frequency Vibration,” 2015 ASPE Annual Meeting, November 1-6, 2015, Austin, TX. (Winner of Best Oral Presentation Award at ASPE 2015). (pdf)
[C15] Duan, M., Okwudire, C.E., 2015, “Energy Efficiency and Performance Optimized Control of a Hybrid Feed Drive,” ASME 2015 International Manufacturing Science and Engineering Conference (MSEC 2015), June 8-12, 2015, Charlotte, NC. (pdf)
[C14] Yoon, D., Pan, Y., Okwudire, C.E., 2014, “Magnet Assisted Stage for Efficient Wafer Scanning,” ASPE 2014 Annual Meeting, November 9-14, 2014, Boston, MA. (pdf)
[C13] Duan, M., Okwudire, C.E., 2014, “Minimum-time Cornering for Manufacturing Machines using Optimal Control,” ASME 2014 Dynamic Systems and Control Conference (DSCC 2014), October 22-24, 2014, San Antonio, TX. (pdf)
[C12] Lee, J., Okwudire, C.E., 2014, “Effects of Non-proportional Damping on the Residual Vibrations of Mode-coupled Ultra-precision Manufacturing Machines,” ASME 2014 Dynamic Systems and Control Conference (DSCC 2014), October 22-24, 2014, San Antonio, TX. (pdf)
[C11] Bağdatlı, S.M., Okwudire, C.E., Ulsoy, A.G., 2014, “Linear Quadratic Design of Passive Vibration Isolators,” ASME 2014 Dynamic Systems and Control Conference (DSCC 2014), October 22-24, 2014, San Antonio, TX. (pdf)
[C10] Kale, S., Dancholvichit, N., Okwudire, C.E., 2014, “Comparative LCA of a Linear Motor and Hybrid Feed Drive under High Cutting Loads,” 6th CIRP High Performance Cutting Conference, June 23-25, 2014, Berkeley, CA. (pdf)
[C9] Lin, C.-R., Chen, B., Okwudire, C.E., 2014, “Reduction of Rapid Positioning Time by Reference Path Modification: A Preliminary Investigation,” ASME 2014 International Manufacturing Science and Engineering Conference (MSEC 2014), June 9-13, 2014, Detroit, MI. (pdf)
[C8] Lee, J., Okwudire, C.E., 2013, “Optimal Damping for the Reduction of Residual Vibrations in Ultra-precision Manufacturing Machines,” ASPE 2013 Annual Meeting, October 20-25, 2013, St. Paul, MN. (pdf)
[C7] Okwudire, C.E., Lee, J., 2013, “Optimal Motor Location for the Reduction of Residual Vibrations in Mode-coupled Ultra-precision Manufacturing Machines,” ASME 2013 International Manufacturing Science and Engineering Conference (MSEC 2013), June 10-14, 2013, Madison, WI. (pdf)
[C6] Okwudire, C.E., Kim, C.-J., Kim, J., 2012, “Reduction of the Vibrations of Ultra-precision Manufacturing Machines via Mode Coupling,” ASPE 2012 Annual Meeting, October 21-26, 2012, San Diego, CA. (pdf)
[C5] Okwudire, C.E., Peng, Z., 2012, “Reduction of Vibrations in Ball Screw Driven Machine Tools by the Optimal Selection of Nut Parameters,” ASME 2012 International Manufacturing Science and Engineering Conference (MSEC 2012), June 4-8, 2012, Notre Dame, IN. (pdf)
[C4] Okwudire, C., 2012, “A Study on the Effects of Isolator, Motor and Work Surface Heights on the Vibrations of Ultra-precision Machine Tools,” 7th International Conference on Micro Manufacturing (ICOMM 2012), March 12-14, 2012, Evanston, IL. (pdf)
[C3] Okwudire, C.E., Altintas, Y., 2008, “Effective Control of Direct Drives using a Disturbance Adaptive Discrete-time Sliding Mode Controller,” 3rd CIRP High Performance Cutting Conference, June 12-13, 2008, Dublin, Ireland. (pdf)
[C2] Okwudire, C.E., Altintas, Y., 2008, “Effective Simulation of Ballscrew Drives Modeled using Finite Element Methods,” ASME International Mechanical Engineering Congress and Exposition (IMECE 2008), October 31-November 6, 2008, Boston, MA. (pdf)
[C1] Okwudire, C.E., Altintas, Y., 2007, “Modeling of the Screw-nut Interface Dynamics of Ballscrew Drives,” ASME International Mechanical Engineering Congress and Exposition (IMECE 2007), November 11-15, 2007, Seattle, WA. (pdf)
Theses
[T10] Edoimioya, N., 2023, Modeling and Feedforward Vibration Compensation of Advanced Manipulators for Extrusion-Based Additive Manufacturing, Doctoral Dissertation, University of Michigan. (pdf)
[T9] Ramani, K. S., 2020, Feedforward Tracking Control of Nonminimum Phase and Uncertain Linear Systems using Filtered Basis Functions – with Application to 3D Printing, Doctoral Dissertation, University of Michigan. (pdf)
[T8] Dong, X., 2020, Mechatronics Methods for Mitigating Undesirable Effects of Pre-motion Friction in Nanopositioning Stages with Mechanical Bearings, Doctoral Dissertation, University of Michigan. (pdf)
[T7] Lin, Bo., 2019, Low Order Modeling of Load Distribution and Friction in Ball Bearings and Ball Screws – with Application to Electric Power Assisted Steering, Doctoral Dissertation, University of Michigan. (pdf)
[T6] Yoon, D., 2019, Design and Optimal Control of a Magnet Assisted Scanning Stage for Precise and Energy Efficient Positioning, Doctoral Dissertation, University of Michigan. (pdf)
[T5] Duan, M., 2018, Energy-Optimal Control of Over-actuated Systems - with Application to a Hybrid Feed Drive, Doctoral Dissertation, University of Michigan. (pdf)
[T4] Zhang, D., 2017, Reduction of Steering Effort in the Event of EPAS Failure using Differential Braking Assisted Steering, Master's Thesis, University of Michigan. (pdf)
[T3] Lee, J., 2016, Vibration Reduction in Passively-isolated Ultra-precision Manufacturing Machines using Mode Coupling, Doctoral Dissertation, University of Michigan. (pdf)
[T2] Okwudire, C.E., 2009, Modeling and Control of High Speed Machine Tool Feed Drives, Doctoral Dissertation, University of British Columbia. (pdf)
[T1] Okwudire, C.E., 2005, Finite Element Modeling of Ballscrew Feed Drive Systems for Control Purposes, Master's Thesis, University of British Columbia. (pdf)
[T9] Ramani, K. S., 2020, Feedforward Tracking Control of Nonminimum Phase and Uncertain Linear Systems using Filtered Basis Functions – with Application to 3D Printing, Doctoral Dissertation, University of Michigan. (pdf)
[T8] Dong, X., 2020, Mechatronics Methods for Mitigating Undesirable Effects of Pre-motion Friction in Nanopositioning Stages with Mechanical Bearings, Doctoral Dissertation, University of Michigan. (pdf)
[T7] Lin, Bo., 2019, Low Order Modeling of Load Distribution and Friction in Ball Bearings and Ball Screws – with Application to Electric Power Assisted Steering, Doctoral Dissertation, University of Michigan. (pdf)
[T6] Yoon, D., 2019, Design and Optimal Control of a Magnet Assisted Scanning Stage for Precise and Energy Efficient Positioning, Doctoral Dissertation, University of Michigan. (pdf)
[T5] Duan, M., 2018, Energy-Optimal Control of Over-actuated Systems - with Application to a Hybrid Feed Drive, Doctoral Dissertation, University of Michigan. (pdf)
[T4] Zhang, D., 2017, Reduction of Steering Effort in the Event of EPAS Failure using Differential Braking Assisted Steering, Master's Thesis, University of Michigan. (pdf)
[T3] Lee, J., 2016, Vibration Reduction in Passively-isolated Ultra-precision Manufacturing Machines using Mode Coupling, Doctoral Dissertation, University of Michigan. (pdf)
[T2] Okwudire, C.E., 2009, Modeling and Control of High Speed Machine Tool Feed Drives, Doctoral Dissertation, University of British Columbia. (pdf)
[T1] Okwudire, C.E., 2005, Finite Element Modeling of Ballscrew Feed Drive Systems for Control Purposes, Master's Thesis, University of British Columbia. (pdf)
Patents
[P4] Dong, X., Yoon, D., Okwudire, C.E., Axially Compliant Bearing For Precision Positioning, US Patent # 10837492, Publication Date: November 17, 2020
[P3] Duan, M., Okwudire, C.E., Ramani, K.S., Use of Filtered Basis Splines to Compensate Servo-Induced Motion Errors, US Patent # 10585414, Publication date: March 10, 2020.
[P2] Okwudire, C.E., Dong, X., Vibration Assisted Nanopositioning Stage, US Patent # 10281829. Publication Date: May 7, 2019.
[P1] Okwudire, C.E., Yoon, D., Magnet Assisted Stage for Vibration and Heat Reduction in Wafer Scanning, 10077865. Publication Date: September 18, 2018
[P3] Duan, M., Okwudire, C.E., Ramani, K.S., Use of Filtered Basis Splines to Compensate Servo-Induced Motion Errors, US Patent # 10585414, Publication date: March 10, 2020.
[P2] Okwudire, C.E., Dong, X., Vibration Assisted Nanopositioning Stage, US Patent # 10281829. Publication Date: May 7, 2019.
[P1] Okwudire, C.E., Yoon, D., Magnet Assisted Stage for Vibration and Heat Reduction in Wafer Scanning, 10077865. Publication Date: September 18, 2018