State-Triggered Fault-Tolerant Control Strategy for Performance Recovery in Nonlinear Interconnected Systems
针对非线性互联系统，提出一种状态触发的容错控制策略，通过事件触发链式滤波器处理状态不可微性，并利用动态冗余方法约束误差、恢复性能，适用于多种执行器故障。
This article develops the performance recovery-based state-triggered fault-tolerant control (FTC) strategy for nonlinear interconnected systems (NISs). Under discontinuous state transmission, a novel set of event-triggered chainlike filters is introduced to reconstruct the error coordinate transformation, effectively addressing the challenge of state-triggered nondifferentiability. Then, a dynamic redundancy fault-tolerant control method is presented, which is tailored to constrain full errors and ensure prescribed performance, even in the face of actuator faults. It is capable of handling different types of faults, including moderate faults and extreme faults, and explicitly takes deferred actuator switching into account. By exploiting the performance function, the exceeding errors can be recovered into the safe constraints even after complete actuator failure. Besides, the globally uniformly ultimately bounded of closed-loop signals is realized without dependence on any unknown initial conditions. Finally, the validity of the proposed method is confirmed by a practical example.