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Proceedings Papers

Dynamic Geometric Modeling for Directed Energy Deposition Process

Wenze Zhang, Siqi Chen, Boge Dong, Yuanzhi Chen, Xiaoke Deng, Molong Duan, Kai Tang
Proc. ASME. MSEC2024, Volume 1: Additive Manufacturing; Advanced Materials Manufacturing; Biomanufacturing; Life Cycle Engineering, V001T01A049, June 17–21, 2024
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2024-125486
https://doi.org/10.1115/MSEC2024-125486
View Paper titled, Dynamic Geometric Modeling for Directed Energy Deposition Process
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Topics: Additive manufacturing, Dynamic models, Geometric modeling, Geometry, Manufacturing, Metals, Printing, Process control, Signals, Simulation
Proceedings Papers

Continuous Fiber Path Optimization in Composite Additive Manufacturing via a Finite Element Model With B-Spline Fiber Parameterization

Molong Duan, Shuaiyin He
Proc. ASME. MSEC2023, Volume 1: Additive Manufacturing; Advanced Materials Manufacturing; Biomanufacturing; Life Cycle Engineering, V001T01A017, June 12–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2023-104775
https://doi.org/10.1115/MSEC2023-104775
View Paper titled, Continuous Fiber Path Optimization in Composite Additive Manufacturing via a Finite Element Model With B-Spline Fiber Parameterization
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Topics: Additive manufacturing, B-splines, Composite materials, Fibers, Finite element model, Optimization, Parametrization
Proceedings Papers

Thermal-Image-Enabled Additive Manufacturing Process Monitoring and Extrusion Trajectory Compensation

Molong Duan, Siqi Chen, Yuexin Yang
Proc. ASME. MSEC2023, Volume 1: Additive Manufacturing; Advanced Materials Manufacturing; Biomanufacturing; Life Cycle Engineering, V001T01A018, June 12–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2023-104786
https://doi.org/10.1115/MSEC2023-104786
View Paper titled, Thermal-Image-Enabled Additive Manufacturing Process Monitoring and Extrusion Trajectory Compensation
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Topics: Additive manufacturing, Extruding, Process monitoring, Trajectories (Physics)
Journal Articles

Optimal Selection of Basis Functions for Minimum-Effort Tracking Control of Nonminimum Phase Systems Using Filtered Basis Functions

Keval S. Ramani, Molong Duan, Chinedum E. Okwudire, A. Galip Ulsoy
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. November 2019, 141(11): 111009.
Paper No: DS-18-1094
https://doi.org/10.1115/1.4044355
Published Online: September 18, 2019
View Article titled, Optimal Selection of Basis Functions for Minimum-Effort Tracking Control of Nonminimum Phase Systems Using Filtered Basis Functions
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Topics: B-splines, Control equipment, Dynamics (Mechanics), Errors, Tracking control, Trajectories (Physics), Engineering simulation, Simulation, Feedforward control, System dynamics
Journal Articles

Analytical and Low-Order Numerical Modeling of Ball-to-Ball Contact Friction in Linear Ball Bearings and Ball Screws

Bo Lin, Molong Duan, Chinedum E. Okwudire
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. July 2019, 141(7): 071401.
Paper No: TRIB-18-1443
https://doi.org/10.1115/1.4043630
Published Online: May 17, 2019
View Article titled, Analytical and Low-Order Numerical Modeling of Ball-to-Ball Contact Friction in Linear Ball Bearings and Ball Screws
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Topics: Ball bearings, Computer simulation, Friction, Screws, Finite element analysis
Proceedings Papers

An Improved Analytical Model of Friction and Ball Motion in Linear Ball Bearings With Application to Ball-to-Ball Contact Prediction

Bo Lin, Molong Duan, Chinedum E. Okwudire, Jason S. Wou
Proc. ASME. IMECE2018, Volume 4A: Dynamics, Vibration, and Control, V04AT06A054, November 9–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2018-88033
https://doi.org/10.1115/IMECE2018-88033
View Paper titled, An Improved Analytical Model of Friction and Ball Motion in Linear Ball Bearings With Application to Ball-to-Ball Contact Prediction
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Topics: Ball bearings, Friction, Machine components
Journal Articles

Boosting Speed and Accuracy in Precision Motion Control

Keval S. Ramani, Molong Duan, Deokkyun Yoon, Chinedum E. Okwudire, A. Galip Ulsoy
Journal: Mechanical Engineering
Publisher: ASME
Article Type: Select Article
Mechanical Engineering. September 2018, 140(09): S17–S23.
Paper No: ME-2018-SEP7
https://doi.org/10.1115/1.2018-SEP7
Published Online: September 1, 2018
View Article titled, Boosting Speed and Accuracy in Precision Motion Control
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Topics: Dynamics (Mechanics), Errors, Feedback, Feedforward control, Manufacturing, Mechanical engineering, Semiconductor wafers, Sensors, Sustainability, Tracking control
Proceedings Papers

A Simplified Analytical Model of Rolling/Sliding Behavior and Friction in Four-Point-Contact Ball Bearings and Screws

Bo Lin, Molong Duan, Chinedum E. Okwudire, Jason S. Wou
Proc. ASME. IMECE2017, Volume 4A: Dynamics, Vibration, and Control, V04AT05A054, November 3–9, 2017
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2017-72486
https://doi.org/10.1115/IMECE2017-72486
View Paper titled, A Simplified Analytical Model of Rolling/Sliding Behavior and Friction in Four-Point-Contact Ball Bearings and Screws
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Topics: Ball bearings, Friction, Screws, Machine components, Coulombs, Errors, Geometry, Manufacturing
Proceedings Papers

Proxy-Based Optimal Dynamic Control Allocation for Multi-Input, Multi-Output Over-Actuated Systems

Molong Duan, Chinedum Okwudire
Proc. ASME. DSCC2017, Volume 1: Aerospace Applications; Advances in Control Design Methods; Bio Engineering Applications; Advances in Non-Linear Control; Adaptive and Intelligent Systems Control; Advances in Wind Energy Systems; Advances in Robotics; Assistive and Rehabilitation Robotics; Biomedical and Neural Systems Modeling, Diagnostics, and Control; Bio-Mechatronics and Physical Human Robot; Advanced Driver Assistance Systems and Autonomous Vehicles; Automotive Systems, V001T03A005, October 11–13, 2017
Publisher: American Society of Mechanical Engineers
Paper No: DSCC2017-5343
https://doi.org/10.1115/DSCC2017-5343
View Paper titled, Proxy-Based Optimal Dynamic Control Allocation for Multi-Input, Multi-Output Over-Actuated Systems
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Topics: Energy efficiency, Optimization, Simulation
Proceedings Papers

Near Energy Optimal Control Allocation for Dual-Input Over-Actuated Systems

Molong Duan, Chinedum Okwudire
Proc. ASME. DSCC2016, Volume 1: Advances in Control Design Methods, Nonlinear and Optimal Control, Robotics, and Wind Energy Systems; Aerospace Applications; Assistive and Rehabilitation Robotics; Assistive Robotics; Battery and Oil and Gas Systems; Bioengineering Applications; Biomedical and Neural Systems Modeling, Diagnostics and Healthcare; Control and Monitoring of Vibratory Systems; Diagnostics and Detection; Energy Harvesting; Estimation and Identification; Fuel Cells/Energy Storage; Intelligent Transportation, V001T01A011, October 12–14, 2016
Publisher: American Society of Mechanical Engineers
Paper No: DSCC2016-9905
https://doi.org/10.1115/DSCC2016-9905
View Paper titled, Near Energy Optimal Control Allocation for Dual-Input Over-Actuated Systems
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Topics: Optimal control, Control equipment, Approximation, Computation, Energy efficiency, Engineering simulation, Optimization, Simulation
Journal Articles

Tracking Control of Linear Time-Invariant Nonminimum Phase Systems Using Filtered Basis Functions

Keval S. Ramani, Molong Duan, Chinedum E. Okwudire, A. Galip Ulsoy
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. January 2017, 139(1): 011001.
Paper No: DS-15-1479
https://doi.org/10.1115/1.4034367
Published Online: September 8, 2016
View Article titled, Tracking Control of Linear Time-Invariant Nonminimum Phase Systems Using Filtered Basis Functions
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Topics: Errors, Stability, Tracking control, Trajectories (Physics), Filters, Dynamics (Mechanics)
Proceedings Papers

Tracking Control of Non-Minimum Phase Systems Using Filtered Basis Functions: A NURBS-Based Approach

Molong Duan, Keval S. Ramani, Chinedum E. Okwudire
Proc. ASME. DSCC2015, Volume 1: Adaptive and Intelligent Systems Control; Advances in Control Design Methods; Advances in Non-Linear and Optimal Control; Advances in Robotics; Advances in Wind Energy Systems; Aerospace Applications; Aerospace Power Optimization; Assistive Robotics; Automotive 2: Hybrid Electric Vehicles; Automotive 3: Internal Combustion Engines; Automotive Engine Control; Battery Management; Bio Engineering Applications; Biomed and Neural Systems; Connected Vehicles; Control of Robotic Systems, V001T03A006, October 28–30, 2015
Publisher: American Society of Mechanical Engineers
Paper No: DSCC2015-9859
https://doi.org/10.1115/DSCC2015-9859
View Paper titled, Tracking Control of Non-Minimum Phase Systems Using Filtered Basis Functions: A NURBS-Based Approach
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Topics: Tracking control, Errors, B-splines, Control equipment, Dynamics (Mechanics), Trajectories (Physics)
Proceedings Papers

Energy Efficiency and Performance Optimized Control of a Hybrid Feed Drive

Molong Duan, Chinedum E. Okwudire
Proc. ASME. MSEC2015, Volume 2: Materials; Biomanufacturing; Properties, Applications and Systems; Sustainable Manufacturing, V002T05A007, June 8–12, 2015
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2015-9498
https://doi.org/10.1115/MSEC2015-9498
View Paper titled, Energy Efficiency and Performance Optimized Control of a Hybrid Feed Drive
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Topics: Energy efficiency, Feedback, Machine tools, Control equipment, Engineering simulation, Linear motors, Screws, Simulation
Proceedings Papers

Minimum-Time Cornering for Manufacturing Machines Using Optimal Control

Molong Duan, Chinedum E. Okwudire
Proc. ASME. DSCC2014, Volume 1: Active Control of Aerospace Structure; Motion Control; Aerospace Control; Assistive Robotic Systems; Bio-Inspired Systems; Biomedical/Bioengineering Applications; Building Energy Systems; Condition Based Monitoring; Control Design for Drilling Automation; Control of Ground Vehicles, Manipulators, Mechatronic Systems; Controls for Manufacturing; Distributed Control; Dynamic Modeling for Vehicle Systems; Dynamics and Control of Mobile and Locomotion Robots; Electrochemical Energy Systems, V001T13A003, October 22–24, 2014
Publisher: American Society of Mechanical Engineers
Paper No: DSCC2014-6143
https://doi.org/10.1115/DSCC2014-6143
View Paper titled, Minimum-Time Cornering for Manufacturing Machines Using Optimal Control
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Topics: Machinery, Manufacturing, Optimal control, Corners (Structural elements), Tradeoffs, Dynamic programming, Kinematics, Splines