Disturbance Rejection Attitude Control For The Endoatmospheric Boost Glide Tactical Missile

The endoatmospheric boost glide tactical missile is characteristic of long range,excellent penetration ability and high precise strike,and has a significant development prospection in the modern high-tech local warfare.However,the attitude control is of great challenges with respect to the fast variability,strong nonlinear coupling,large model parameter uncertainties and external disturbances.In this paper,based on the idea of disturbance estimation and active rejection,the nonliear disturbance rejection attitude control strategies were systematically investigated in order to improve the capability of disturbance rejection and control precision.The main results achieved in this dissertation are summarized as follows:The closed-loop bandwidth based nonlinear dynamic inversion disturbance rejection control was investigated to realize the fast design of the attitude control.Based on the exact linearization,the lumped disturbances were estimated by the extended state observer.The nonlinear dynamic inversion disturbance rejection control was proposed by directly imposed the estimated lumped disturbances into the control.The control parameters were converted to the desired closed-loop bandwidth to realize the fast design of the attitude control.The simulations results have demonstrated that the proposed method can significantly enhance the disturbance rejection capability of the endoatmospheric boost glide tactical missile attitude control,and the control parameters can be tuned easily.The extended state observer based sliding mode disturbance rejection control was investigated to enhance the attitude control precision.Considering the effect of the mismatched disturbances,the extended state observer was applied to estimate the lumped disturbances for all channels.The high precision sliding mode disturbance rejection control was proposed by introducing the estimated mismatched disturbances into the sliding mode function,and the closed-loop stability was analyzed.The Monte Carlo simulation results have demonstrated that the proposed method can actively reject the mismatched disturbances,and significantly enhance the tracking precision of the endoatmospheric boost glide tactical missile attitude control.The SDRE output feedback disturbance rejection attitude control was investigated based on the generalized extended state observer and equivalent input disturbance.The nonlinear system was converted into the linear-like system with state-dependent coefficient matries via extended linearization.And then,the disturbance attenuation gain was designed to rejecte all the disturbances.Meanwhile,by converting all the disturbances as the equivalent input disturbance,together with the generalized extended state observer,the output feedback SDRE disturbance rejection control was proposed.The simulation results have demonstrated that the proposed SDRE output feedback disturbance rejection control methods can significantly resolve the disturbance rejection problem,and improve the tracking precision of the endoatmospheric boost glide tactical missile attitude control with just the measurable attitude information.The nonlinear disturbance observer based PFC disturbance rejection control was investigated,providing a new idea for the attitude control.The extended linearization method was used to design the nonlinear predictive model.And then,considering the lumped disturbances estimated by the nonlinear disturbance observer,the predictive functional control(PFC)based disturbance rejection attitude control was proposed.The simulation results have demonstrated that the proposed PFC disturbance rejection attitude control can significantly enhance the disturbance rejection capability,and is of higher computational efficiency,providing a new idea for the endoatmospheric boost glide tactical missile attitude control.In this paper,according to the idea of disturbance estimation and active rejetion,the nonliear disturbance rejection attitude control methods with various disturbance compensation manners were systematicaly investigated based on the exact linearization and extended linearization,respectively.This work made a great contribution for the high precision attitude control for the endoatmospheric boost glide tactical missile,and provided new ideas for the disturbance rejection control.At the same time,it also has important reference significance to the high precision attitude control for other flight vehicles.