Title :
A Setup for Active Fault Diagnosis
Author_Institution :
Tech. Univ. Denmark, Lyngby
Abstract :
A setup for active fault diagnosis (AFD) of parametric faults in dynamic systems is formulated in this note. It is shown that it is possible to use the same setup for both open loop systems, closed-loop systems based on a nominal feedback controller as well as for closed-loop systems based on a reconfigured feedback controller. This will make the proposed AFD approach very useful in connection with fault tolerant control (FTC). The setup will make it possible to let the fault diagnosis part of the fault tolerant controller remain unchanged after a change in the feedback controller. The setup for AFD is based on the Youla-Jabr-Bongiorno-Kucera (YJBK) parameterization of all stabilizing feedback controllers and the dual YJBK parameterization. It is shown that the AFD is based directly on the dual YJBK transfer function matrix. This matrix will be named the fault signature matrix when it is used in connection with AFD
Keywords :
closed loop systems; fault diagnosis; feedback; open loop systems; stability; time-varying systems; transfer function matrices; active fault diagnosis; closed-loop systems; dynamic systems; fault tolerant control; nominal feedback controller; open loop systems; parametric faults; transfer function matrix; Adaptive control; Automatic control; Closed loop systems; Control systems; Fault detection; Fault diagnosis; Fault tolerance; Feedback control; Open loop systems; Transfer functions; Active fault diagnosis (AFD); controller reconfiguration; dual Youla–Jabr–Bongiorno–Kucera (YJBK) parameterization; feedback control systems;
Journal_Title :
Automatic Control, IEEE Transactions on
DOI :
10.1109/TAC.2006.878724
