高超声速飞行器的多幂次滑模控制

In the presence of model parametric uncertainties and external disturbances,a sliding mode controller based on multi power reaching law is proposed for the cruising flight control of hypersonic flight vehicle (HFV).Firstly,the decoupling of HFV's velocity and altitude subsystem is realized via exact feedback linearization technique.Then,multi power reaching law based sliding controller,which adjusts the sliding surface reaching process through three exponential coefficients,is exploited.So the system convergence speed can be improved significantly.And a linear extended state observer (LESO) is used for the precise estimation and compensation of the model uncertainties and external disturbances,which enormously enhances the ability of disturbance rejection.Furthermore,it is demonstrated that the system can converge to neighborhood of equilibrium point quickly via Lyapunov stability theory.Finally,simulation results demonstrates the validity of the proposed method.