Improved Disturbance Observer Based Control Structure

摘要：

This paper proposes an improved disturbance observer(DOB)based control configuration for non-minimum phase plants. The method introduces a high-pass filter in parallel with the plant. The filter is designed so that the parallel connection with the plant becomes of minimum phase. In the proposed control structure not only the output of nominal performance controller but also the feedback signal of system output are compensated by adding the another two controllers. Thus, the influences of the external disturbance and the measurement noise on the system output could be eliminated. Then, we discuss the internal stability and robust stability of this whole control system. At last, the design method of the high-pass filter is also given.

关键词： Robust Control Disturbance Observer(DOB) Non-minimum Phase Measurement Noise High-pass Filter

作者: Zhongliang He Wei Xie

作者单位: College of Automation Science and Engineering,South China University of Technology,Guangzhou, 510640 China

会议类型: 国际会议

会议名称: 2009年中国控制与决策会议(2009 Chinese Control and Decision Conference)

会议地点: 广西桂林

会议语种:英文

页码: 1015-1020

在线出版日期: 2009-06-17（万方平台首次上网日期，不代表论文的发表时间）