Design of Compensator for Input Dead Zone of Actuator Nonlinearities
Weijie Chen*1,*2, Jundong Wu*3, and Jinhua She*4
*1School of Information Science and Engineering, Central South University, 932 Lushan South Road, Yuelu District, Changsha 410083, China
*2Hunan Engineering Laboratory for Advanced Control and Intelligent Automation, 932 Lushan South Road, Yuelu District, Changsha 410083, China
*3School of Electronics Engineering and Computer Science, Peking University, 45 Jia, Peking University, Haidian District, Beijing 100871, China
*4School of Computer Science, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0987, Japan
This paper considers the problem of tracking a periodic signal for a plant with an input dead zone in the actuator. The nonlinearity greatly degrades control performance. To solve this problem, we incorporate an equivalent-input-disturbance (EID) compensator into a repetitive control system (RCS), resulting in a new system configuration. We combine the linear-matrixinequality technique with singular-value decomposition to analyze the stability of the system and to devise a design method. Unlike other methods, this one does not require any information about the dead zone. Simulation results demonstrate its effectiveness.
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