Nonlinear Output Feedback Control of A 5DOF AMB System

Authors:	Liu Kang-Zhi, Chiba University, Japan He Rong, Chiba University, Japan Saito Osami, Chiba University, Japan
Topic:	4.2 Mechatronic Systems
Session:	Mechatronic Sensing and Actuation
Keywords:	Magnetic bearing system, Nonlinear output feedback, Quadratic-like Lyapunov function, Power consumption

Abstract

A nonlinear dynamic output feedback control method for a 5-degree-of-freedom AMB (active magnetic bearing system) is presented in this paper. This method is based on the system structure of AMB and a quadratic-like Lyapunov function. It is shown that backstepping and completing square techniques enable the construction of the voltage input by using measured output only. The control law guarantees the asymptotic stability of the closed loop system.