Adaptive fuzzy fault-tolerant output feedback control of uncertain nonlinear systems with actuator faults

作者：Huo Baoyu; Tong Shaocheng^*; Li Yongming

来源：International Journal of Systems Science, 2013, 44(12): 2365-2376.

DOI：10.1080/00207721.2012.704092

• uncertain nonlinear systems
• fuzzy tolerant-control
• actuator faults
• state observer
• stability analysis

This article develops an adaptive fuzzy control method for accommodating actuator faults in a class of unknown nonlinear systems with unmeasured states. The considered faults are modelled as both loss of effectiveness and lock-in-place (stuck at unknown place). With the help of fuzzy logic systems to approximate the unknown nonlinear functions, a fuzzy adaptive observer is developed for estimating the unmeasured states. Combining the backstepping technique with the nonlinear tolerant-fault control theory, a novel adaptive fuzzy faults-tolerant control approach is constructed. It is proved that the proposed control approach can guarantee that all the signals of the resulting closed-loop system are bounded and the tracking error between the system output and the reference signal converges to a small neighbourhood of zero by appropriate choice of the design parameters. Simulation results are provided to show the effectiveness of the control approach.

• 出版日期2013-12-1
• 单位辽宁工业大学