Abstract
In this paper, a robust finite-time fault-tolerant control (FTC) scheme is developed for uncertain linear systems in the presence of actuator faults. Since the system uncertainties and actuator faults are unknown, the controller parameters are updated online by the adaptive laws without the need for fault detection and isolation. It is proved that the proposed state-feedback model reference adaptive finite-time FTC scheme can guarantee that the tracking error converges to a small neighborhood of the origin in finite time. An application example for an aircraft lateral-directional dynamic system is presented to show the effectiveness of the proposed control scheme.
Highlights
In a practical system, e.g., networked control system and ight control system, the actuator component usually su ers from a partial loss of e ectiveness (LOE) or even a total loss of control (LOC) due to the increasing complexity of system itself and operating environment [1,2,3,4,5]
Motivated by the above discussion, this paper will study the finite-time tracking control of uncertain linear systems with unknown actuator faults. e main contributions are given as follows: (1) A robust model reference adaptive fault-tolerant tracking control scheme with finite-time convergence property for linear systems is developed to compensate for time-varying system matrix uncertainty and unknown actuator faults without requiring fault detection and isolation
Simulation studies on a lateral-directional dynamic model of the F-18 high-angle-of-attack research vehicle (HARV) system [47] are given to illustrate the effectiveness of the proposed robust adaptive finite-time fault-tolerant control (FTC) scheme
Summary
E.g., networked control system and ight control system, the actuator component usually su ers from a partial loss of e ectiveness (LOE) or even a total loss of control (LOC) due to the increasing complexity of system itself and operating environment [1,2,3,4,5]. By considering that the stuck fault is bounded, a robust adaptive FTC scheme was proposed for uncertain linear systems in [16]. In [17], a direct adaptive control scheme was designed to compensate for spacecraft systems with multiple actuator faults and inertia matrix uncertainties. (1) A robust model reference adaptive fault-tolerant tracking control scheme with finite-time convergence property for linear systems is developed to compensate for time-varying system matrix uncertainty and unknown actuator faults without requiring fault detection and isolation (2) e unknown parameters caused by system uncertainty and actuator faults can be estimated by the designed tracking error-driven adaptive laws, which promises the adaptivity of the proposed controller (3) e proposed control law is chattering-free, which is more practical for engineering applications e rest of this paper is organized as follows.
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