An adaptive observer for joint estimation of states and parameters in both state and output equations

作者：Li, Xiuliang; Zhang, Qinghua^*; Su, Hongye

来源：International Journal of Adaptive Control and Signal Processing, 2011, 25(9): 831-842.

DOI：10.1002/acs.1244

• adaptive observer
• state and parameter estimation
• linear time-varying system
• fault detection and isolation

An adaptive observer is a recursive algorithm for joint state-parameter estimation of parameterized state-space systems. Previous works on globally convergent adaptive observers consider unknown parameters either in state equations or in output equations, but not in both of them. In this paper, a new adaptive observer is designed for linear time-varying systems with unknown parameters in both state and output equations. Its global convergence for simultaneous estimation of states and parameters is formally established under appropriate assumptions. A numerical example is presented to illustrate the performance of this adaptive observer.

• 出版日期2011-9
• 单位INRIA; 浙江大学