An Improved Adaptive Observer Design for a Class of Linear Time-varying Systems

摘要：

In previous studies on adaptive observers for linear time-varying (LTV) systems, the provided results were commonly based on a strong assumption that there exists a time-varying feedback gain matrix F(t) stabilizing the pair (A(t),C(t)). However, in general, it is a dif.cult task for LTV system (A(t),B(t),C(t)). In this note, we apply an improved high gain observer to the design of adaptive observers for a class of LTV systems with uncertain parameters. The proposed observer removes the difficulty of finding F(t) by using a time-varying high-gain matrix, where only a constant parameter and a constant matrix need to be designed. Through a transformation for the error dynamics, it shows that the estimated errors are globally exponentially convergent. Finally, an illustrative example is included to show the validity of the design approach.

关键词： Adaptive observer Linear time-varying systems High-gain

作者: Jian Zhang Dongyu Yin Hongbin Zhang

作者单位: School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu, School of Electronic and Information Engineering, Sichuan University, Chengdu, Sichuan, 610064, P. R

会议类型: 国际会议

会议名称: 2011 China Control and Decision Conference(2011中国控制与决策会议 CCDC)

会议地点: 四川绵阳

会议语种:英文

页码: 1395-1398

在线出版日期: 2011-05-23（万方平台首次上网日期，不代表论文的发表时间）