Roll control analysis for the long-rang reentry vehicle under composite control

A combination BTT control mode with the single moving mass and differential aileron is proposed in this paper for some engineering problems of long-range reentry maneuverable vehicle controlled by only one actuator. This control mode can not only avoid the elevator and rudder ablation to improve the efficiency of attitude control, but also reduce the quantity of moving mass actuator. According to the dynamics model of the proposed control mode, the extended state observer is used to estimate the states of system, the external disturbances and parameter uncertainties disturbance based on an integrated manner, then the roll channel control system is designed by using LQR controller. Lastly, the simulation results are presented to demonstrate the efficacy of the extended state observer in estimation of the uncertainties and states, and the proposed design is robust to the disturbances caused by the moving mass lateral movement and the asymmetric ablation of vehicle, parameter uncertainties, unmodeled dynamics.