Adaptive Augmented Disturbance Rejection Attitude Control Method For Solid Launch Vehicle

Launch vehicle is the necessary guarantee to carry out space activities and implement space development strategy.As one of the important subsystems of launch vehicle,control system has very important research value.According to the design requirements of the control system of solid launch vehicle,this paper focuses on solving the high fidelity elastic vibration dynamic modeling method,elastic vibration adaptive control method and attitude control method under the condition of wind disturbance and insufficient execution efficiency.The main research contents include:Firstly,the development status of solid launch vehicle at home and abroad is investigated,and the attitude control methods of solid launch vehicle are analyzed and summarized.Then,the force of solid launch vehicle is analyzed.Based on Newton Euler method,the dynamic equations of mass center,rotation around the mass center and elastic vibration equation are established to reflect the real dynamic characteristics of the carrier with high fidelity,It lays the foundation for the subsequent control system design.Then,the dynamic model of elastic vibration is linearized with small disturbance,and PD controller is designed based on the small disturbance linearization model.In order to effectively suppress the elastic vibration signal,a correction network is designed based on quantum genetic algorithm.In order to further improve the control ability of the system in the presence of large deviation and disturbance,the adaptive gain adjustment module is designed,including the design of adaptive law,reference model and high-low-pass filter.The effectiveness and feasibility of the algorithm are verified by numerical simulation under typical conditions.Finally,aiming at the problem of roll channel stability control of launch vehicle under high altitude wind disturbance,a roll channel control strategy based on disturbance observation disturbance transformatio n disturbance compensation mode is designed,three kinds of observers are proposed and their performances are compared.Aiming at the problem of insufficient execution efficiency of roll channel,the command reference model is designed and the transition p rocess is arranged to ensure the attitude command response quality of roll channel under wind interference or omni-directional launching conditions.The effectiveness and rationality of the algorithm are verified by numerical simulation under typical working conditions.