一类参数不确定的线性时变系统的故障调节  

Fault accommodation for a class of linear time-varying systems with parametric uncertainties

作　　者：高志峰[1] 姜斌[1] 

机构地区：[1]南京航空航天大学自动化学院,江苏南京210016

出　　处：《系统工程与电子技术》2009年第12期2924-2928,共5页Systems Engineering and Electronics

基　　金：国家自然科学基金(90816023)资助课题

摘　　要：基于H∞控制思想,通过引入H∞性能指标,针对一类带参数不确定的多输入多输出线性时变系统,利用李雅普诺夫方法设计了一种新颖的鲁棒自适应观测器。通过两种不同自适应故障估计律的设计和比较,得到了影响这类鲁棒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用于一类带参数不确定的线性时变系统的故障调节问题,故障估计误差能够最终一致有界且满足事先所给定的H∞性能指标。最后,对一个飞控系统进行仿真,验证了所得结论的有效性和可行性。Based on the H∞ control theorem, by introducing the H∞ performance index, a novel roubst adaptive observer using Lyapunov approach is designed for a class of MIMO linear time-varying systems with parameter uncertainties. By designing two differenent adaptive fault estimation laws and comparing with each other, several factors influencing the performance of fault estimation for the class of adaptive observer are obtained. The designed adaptive observer is used to the problem of fault accommodation for a class of linear time-varying systems with parameter uncertainties, and the fault estimation error is ultimately bounded uniformly and satisfies the prescribed H∞ performance index. The simulation result for a flight control system illustrates the effectiveness and feasibility of the proposed method.

关 键 词：故障估计 故障调节 鲁棒自适应观测器 H∞性能指标 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]