关键词:
launch vehicle
actuator fault
super-twisting sliding mode control(SMC)
fault-tolerant control
fuzzy logic control
摘要:
A fault-tolerant control law based on adaptive super-twisting sliding mode control(SMC)is designed for the attitude command tracking problem of a launch vehicle with actuator faults,considering the uncertainties arising from unknown external disturbances,fuel consumption of the launch vehicle,and the perturbation due to the change in rotational inertia caused by tank sloshing,as well as the potential system model changes due to actuator fault and unmodeled *** control algorithm integrates the super-twisting SMC,the fuzzy logic control,and the adaptive ***,a super-twisting sliding surface is selected to mitigate the“chattering”phenomenon inherent in SMC,ensuring that the system tracking error converges to zero within a finite ***,building upon this sliding surface,the fuzzy logic control is used to approximate the unknown system function,which includes fault *** parameters are used to approach the system parameters and enhance disturbance *** stability and finite-time convergence of the launch vehicle attitude tracking control system are verified by the Lyapunov *** simulations demonstrate the effectiveness and robustness of the proposed adaptive super-twisting SMC algorithm.