Intelligent multivariable fault tolerant control systems

This paper presents an intelligent multivariable fault tolerant control method in the presence of actuator failures. This method employs multiple controllers for different operating environment and condition. Those controllers are designed to regulate system in normal condition and actuator failures, respectively, and can maintain closed loop system stability as well as system outputs within previous given limits under failures. In order to improve the system performance during the time of actuator failures, online manual control in combination with an pole placement controller is introduced. Simulation result demonstrate that the proposed fault tolerance control method can effectively improves control system behaviors.