Fault Tolerant Control Design Based on Takagi-Sugeno Fuzzy Logic: Application to a Three-Tank System

This paper deals with a novel Fault-Tolerant Control (FTC) strategy for non-linear systems without hardware redundancy in case of actuator and system component failures. These failures correspond to blocking or loss of effectiveness of an actuator, leakage of tank bottom and pipes which could lead to a large degradation in performances. The abrupt and increasing nature faults are introduced into the system, followed by the simulation results. The proposed method is based on a conventional PID controller and T-S Fuzzy controller in order to maintain the acceptable performance subject to faults. The effectiveness of this approach is evaluated through the application to a non-linear pilot plant, a three-tank system. A simulation result is given with IAE and ISE error to illustrate the effectiveness of the proposed approach.