Robust Proportional Integral Differential Controller Based on H∞Theory Design for Active Magnetic Bearing
Liu Shuqin,Xu Hua,Yu Lie
(The Academy of Engineering and Sciences, Xi'an Jiaotong University, Xi'an 710049, China)

Abstract: The robust Proportional Integral Differential (PID) design method based on H∞ closed-loop gain shaping theory is developed and used in the active magnetic bearing. After discussing the design theory of the robust PID control system based on H∞ control theory, the robust PID control system was established. Then, the simulations of control system for the radial bearing were performed and good performances were obtained. The robu stness of the actual test rig has been verified by experiments. The robust performance with parameter variations in this test rig and the ability of disturbance rejection are relative to the system band, and they may be determined by S(s)-T(s)curve.
Keywords: robustness;H∞ control;electromagnetic bearings