一类自适应观测器的故障估计性能

Performance of Fault Estimation of a Class of Adaptive Observers

采用H∞跟踪性能指标,给出了一类自适应观测器的一种综合过程,通过对故障自适应律的设计和比较,得到了影响这类自适应观测器故障估计性能的几个因素·所设计的自适应观测器的故障估计误差与故障的幅值大小没有关系,而且可以通过调节H∞跟踪性能指数使故障估计误差达到任意小·仿真例子验证了理论分析的有效性·

Based on the H_∞ tracking performance, a synthesis procedure is given to the design of a class of adaptive observers. Designing the fault adaptive laws through comparison, several factors influencing the performance of fault estimation of the class of adaptive observers are obtained. The fault estimation error of an adaptive observer thus designed is irrelevant to the fault amplitude and it can be tuned to be as small as possible by adjusting H_∞ tracking performance index. A simulation exemplifies the effectiveness of the analysis results.