Fault tolerant control based on PID-type fuzzy logic controller for switched discrete-time systems: An electronic throttle valve application

This paper deals with the problem of Fault Tolerant Control (FTC) using PID-type Fuzzy Logic Controller (FLC) for an Electronic Throttle Valve (ETV) described by a switched discrete-time systems with input disturbances and actuator faults. In order to detect the faults, Unknown Input Observers (UIOs) are designed and formulated in terms of Lyapunov theory and Linear Matrix Inequalities (LMIs). This approach is designed in order to minimize the error between the desired flat trajectory generated using the flatness property and the estimated state provided from differents UIOs and to maintain asymptotic stability under an arbitrary switching signal, even in the presence of actuator faults. The simulation results have shown the effectiveness of the proposed approach.