Approach to fault detection of time‐delay systems using functional observers. Issue 16 (1st July 2014)

• Record Type: Journal Article
• Authors: Huong, D.C.; Trinh, H.; Tran, H.M.; Fernando, T.
• Is Part Of: Electronics letters. Volume 50:Issue 16(2014)
• Page Start: 1132
• Page End: 1134
• Publication Date: 2014-07-01
• Subjects: delays -- fault tolerant control -- observers -- control system synthesis -- actuators -- vectors; time‐delay systems -- actuator fault detection -- generalised state transformation -- state vector -- minimum‐order functional observer -- residual function -- design approach; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2014.1480
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A new methodology is reported for designing functional observers to detect actuator faults of a class of time‐delay systems where the matrix pair ( A, C ) is not observable. First, a generalised state transformation is used to transform the system into new coordinates where the delay term associated with the state vector is injected into the system's output and input. Then, a minimum‐order functional observer is designed to construct a residual function that can trigger system faults. The finding is significant as it is now possible to detect faults of time‐delay systems where the pair ( A, C ) is not required to be observable. A numerical example is given to illustrate the effectiveness of the proposed design approach.