Actuator fault detection and isolation method with adaptation law for nonlinear systems

作者：Zhu Fang Lai^*; Li Xiao Feng; Cen Feng

来源：Control and Decision, 2010, 25(3): 333-338.

• Actuator fault
• Actuator fault detection
• Adaptation law
• Lipschitz
• Lipschitz constant
• Robust observers
• Self-adaptability
• Sliding model
• Uncertain nonlinear systems

The problems of actuator fault detection and isolation based on observers are discussed for uncertain nonlinear systems. By introducing an adaptation law which can adjust the Lipschitz constant of Lipschitz term, self-adaptability of the developed observer is derived, and the Lipschitz constant can be unknown. By using a sliding model control law, the uncertain is controlled, which makes the observer robust. Futhermore, multi-observers are used to reach the actuator fault isolation purpose. Finally, the results of the simulation to a real model of a seventh-order aircraft show the feasibility of the proposed method.

• 出版日期2010
• 单位同济大学