Analysis and Design of Disturbance Observer for Piezoelectric Hysteresis Nonlinear System

摘要：

　　Disturbance observer(DOB)is widely used in high accurate control of servo systems.But hysteresis nonlinearity of the piezoelectric actuator in the system decreases the performance of the system and even causes oscillation.The focus of this paper is on three areas.First,Hammerstein hysteresis model is proposed to describe the dynamic hysteresis effects of piezoelectric actuator.Then,the influences of the hysteresis in the piezoelectric actuator on the DOB performances are analyzed using describing function method.Finally,a DOB combined with hysteresis compensator is designed for piezoelectric actuator.The simulation and experimental results show that,compared with control case without hysteresis compensation,the hysteresis inverse compensator improves the performance of the system and decreases oscillation in high frequency.

关键词： Disturbance observer Hysteresis nonlinearity Hammerstein model Describing function method Hysteresis compensator

作者: Hefei Sun Zhen Zhang

作者单位: Beijing University of Aeronautics and Astronautics,Beijing 100191,China

会议类型: 国际会议

会议名称: The 2015 Chinese Intelligent Automation Conference(2015中国智能自动化会议)

会议地点: 福州

会议语种:英文

页码: 521-532

在线出版日期: 2015-05-08（万方平台首次上网日期，不代表论文的发表时间）