Institute of Robotics and Automatic Information System
Tianjin Key Laboratory of Intelligent Robotics
Seminar Series：Advanced Robotics & Artificial Intelligence
报告题目：Multi-objective Optimal Control Design for Nonlinear Dynamic Systems with Time Delay
报告嘉宾：Jian-Qiao Sun 孙建桥（Professor and Chair, Ph.D., P.E., ASME Fellow Department of Mechanical Engineering School of Engineering University of California Merced, CA 95343, U.S.A.）
The first part of this talk will introduce briefly introduce the on-going projects systems in the Applied Controls laboratory at UC Merced. These include energy harvesting from highway traffic and application of machine learning to mechanical. We then focus on the discussion of recent studies of multi-objective optimal control design for nonlinear dynamic systems with time delay. The first and most important step in the control design for nonlinear dynamic systems with time delay is to guarantee the stability. The performance of the closed-loop system as a function of various system and control parameters is the next step. When there are multiple parameters and control objectives, such a quantitative design step is highly challenging. Very often, the control performance objectives are conflicting to each other, meaning that the improvement of one objective can cause other objectives to degrade. In this talk, we present the results of quantitative design of controls for nonlinear dynamic systems by using the advanced algorithms of multi-objective optimization. The controls can be of linear PID type or nonlinear feedback such as sliding mode. The advanced algorithms of multi-objective optimization consist of parallel cell mapping methods with sub-division techniques. Interesting examples of linear and nonlinear controls will be presented with both numerical simulations and experimental validations.
Dr. Jian-Qiao Sun earned a BS degree in Solid Mechanics from Huazhong University of Science and Technology in Wuhan, China in 1982, a MS and a PhD in Mechanical Engineering from University of California at Berkeley in 1984 and 1988. He worked for Lord Corporation at their Corporate R&D Center in Cary, North Carolina. In 1994, Dr. Sun joined the faculty in the department of Mechanical Engineering at the University of Delaware as an Assistant Professor, was promoted to Associate Professor in 1998 and to Professor in 2003. He joined University of California at Merced in 2007, and is currently a professor and chair of the Department of Mechanical Engineering in School of Engineering. Besides many other editorial experiences, he is the Editor-in-Chief of International Journal of Dynamics and Control published by Springer.
His research interests include time-delayed dynamic systems, stochastic non-linear dynamics and control, cell mapping methods, multi-objective optimization, high-density piezoelectric energy harvesting from highway traffic, data-driven energy management of office building HVAC systems and machine learning applications to mechanical systems.