Actuator Fault Estimation Based on Proportional-Integral Observer for Delayed Continuous-Time Switched Systems

摘要

This paper deals with the problem of actuator fault estimation for continuous-time switched systems with state delay. The proposed fault estimation approach uses a switching proportional-integral observer which allows to obtain fast and exact fault information. Sufficient conditions are achieved by using a multiple Lyapunov-Krasovskii functional. These conditions are manipulated in a simple way in order to obtain a new linear matrix inequality different from the existing ones. To prove the effectiveness of the proposed results, an example of a switched electrical circuit is performed.