测量时滞系统的故障诊断和动态自修复控制  

Fault Diagnosis and Dynamic Self-Restore Control for Systems with Delayed Measurements

作　　者：李娟[1] 叶若红[1] 

机构地区：[1]青岛农业大学机电工程学院,青岛266109

出　　处：《系统仿真学报》2009年第9期2634-2637,共4页Journal of System Simulation

基　　金：青岛市科技计划项目(06-2-2-9-jch);青岛农业大学高层次人才启动基金项目(630815)

摘　　要：研究含有测量时滞的线性系统的故障诊断和自修复控制问题。提出了一种测量时滞系统基于降维状态观测器的故障诊断方法。通过构造含有故障状态的增广系统并进行增广系统测量时滞的无时滞转换,将测量时滞系统的故障诊断问题转化为无时滞增广系统的状态观测问题。通过构造增广系统的降维状态观测器,设计了在线诊断故障的故障诊断器。利用故障诊断的结果,设计了故障的动态自修复控制律使系统在故障情况下能够正常运行。最后,通过一个仿真算例来验证本文所提出的方法的可行性和有效性。The problems of fault diagnosis and self-restore control were studied for linear systems with delayed measurements. A reduced-order observer-based fault diagnosis approach was proposed for systems with delayed measurements in this note. By constructing an augmented system which comprises the states of faults and doing the delay-free transformation of delayed measurements for the augmented system, the problem of fault diagnosis for systems with delayed measurement was transformed into the problem of state observation of a delay-free augmented system. A fault diagnoser was designed which could on-line diagnose faults by constructing a reduced-order state observer of the augmented system. By using the results of fault diagnosis, two dynamic self-restore control laws were designed to make the system work normally with faults. Finally, a numerical example validates the feasibilitv and effectiveness of the proposed approaches.

关 键 词：测量时滞 故障诊断 降维状态观测器 动态自修复控制 无时滞转换 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]