Abstract: This talk gives the output-error-constrained tracking control problem of an electrostatic torsional micromirror beyond the pull-in limit. This problem can be formulated as a robust output regulation problem and it further boils down to a robust regulation problem with output-constrained by adaptive internal model design, the solution of which would in turn lead to the solution of the original problem. Then a regulation controller is designed for such a regulation problem by using the barrier Lyapunov function technique. The proposed adaptive control law ensures the electrostatic torsional micromirror with an enhanced tracking performance in the sense that the moveable micromirror can achieve the sinusoidal wave scanning of any frequency up to a full gap operation without contacts of the fixed bottom electrode, and furthermore, the estimated sinusoidal wave frequency converges to its real value. 

CV: Weijie Sun received his M.S. degree in Control Theory and Control Engineering from Fuzhou University, China, and his Ph.D. degree in Control Theory and Control Engineering from South China University of Technology, China, in 2006 and 2009, respectively. He is currently an Associate Professor in the College of Automation Science and Engineering,South China University of Technology, China. 

Weijie Sun is the author of over 30 technical publications. His research interests include control theory and applications, robotics and automation, dynamical analysis and design of micro/nano devices.