DocumentCode :
425586
Title :
Fault tolerant control for unstable systems: a linear time varying approach
Author :
Stoustrup, Jakob ; Niemann, Henrik
Author_Institution :
Dept. of Control Eng., Aalborg Univ., Denmark
Volume :
2
fYear :
2004
fDate :
June 30 2004-July 2 2004
Firstpage :
1794
Abstract :
In (passive) fault tolerant control design, the objective is to find a fixed compensator, which maintains a suitable performance - or at least stability - in the event that a fault should occur. A major theoretical obstacle to obtain this objective, is that even if the system models corresponding to the occurrence of various faults are simultaneously stabilizable by a linear, time-invariant compensator, this compensator might have to be of a very high order, as shown in a recent publication. In this paper, we propose a design procedure for a time-varying compensator, which overcomes the obstacle for any finite number of faults with a controller order of no more than the plant order. The performance of this compensator might be poor, but a heuristic procedure for improving the performance is also shown, and an example demonstrates that this improvement can be truly significant.
Keywords :
compensation; control system synthesis; fault tolerance; linear systems; stability; time-varying systems; fault tolerant control design; heuristics; linear time varying approach; stabilization; system models; time invariant compensator; unstable systems;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
American Control Conference, 2004. Proceedings of the 2004
Conference_Location :
Boston, MA, USA
ISSN :
0743-1619
Print_ISBN :
0-7803-8335-4
Type :
conf
Filename :
1386840
Link To Document :
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