Sensor fault estimation and compensation for time-delay switched systems

Abstract

In this article, the problems of sensor fault estimation and compensation approaches for time-delay switched systems are investigated based on a switched descriptor observer approach. First, a novel time-delay switched descriptor state observer is proposed to estimate both the state and sensor fault. The proposed observer technique is also extended to systems with nonlinearities. Then, based on the estimation of the sensor fault, an efficient fault-tolerant operation can be realised via sensor fault compensation. Finally, an example is given to show the efficiency of the developed techniques.

Keywords:

• fault compensation
• fault estimation
• switched system
• time delay

Acknowledgements

The authors thank the associate editor and the reviewers for their constructive comments and suggestions which have helped to improve the presentation of this article. This work was supported in part by the National Natural Science Foundation of P.R. China (Nos. 60874051, 60804011, 60904001), the Doctoral Dissertation Innovation and Excellence Foundation of Nanjing University of Aeronautics and Astronautics (BCXJ10-03) and the Engineering and Physical Sciences Research Council, UK (EP/F029195).