Adaptive neural sensor and actuator fault-tolerant control for discrete-time unknown nonlinear systems

Abstract

This paper proposes a novel methodology for trajectory tracking of unknown discrete-time nonlinear systems under sensor and actuator faults. The proposed approach combines a recurrent neural identifier trained online with well-known characteristics of sliding mode technique. This paper includes a stability analysis based on Lyapunov theory. Finally applicability of the proposed scheme is shown through simulation results for a three-phase induction motor whose mathematical model is considered unknown. Furthermore, the system is operated in the presence of unknown disturbances as well as sensor and actuator faults.

Keywords

• Artificial neural networks
• Fault-tolerant control
• Actuator fault
• Rotatory induction motor
• Sensor fault