可重复使用航天器再入段复合控制方法研究

可重复使用航天器再入过程初期,反作用力控制系统是其姿态控制的主要手段,结合气动舵面可以减小飞行器对该系统的总冲需求,提高飞行器动态响应特性。给出了反作用力控制系统与气动舵面复合姿态控制系统的组成及三种复合控制指令分配策略,并进行了仿真计算,分析了三种策略的姿态控制效果及总冲需求。仿真结果表明,三种方法均能完成飞行器姿态控制,并各有其优缺点,研究结果为航天器飞行控制系统控制律设计提供了有效参考。

Research on Composite Control Method for Reusable Launch Vehicle

During the early stage of reusable launch vehicle(RLV) re-entry flight,reaction control system(RCS) is a major attitude control device.Combined with aero control surface,the total impulse requirement can be reduced and the vehicle's dynamic response characteristics can be improved.This paper describes the RCS,aero surface combined attitude control system infrastructure and three composite control command distribution policies.Based on simulation,the attitude control effects and total impulse requirements of the three policies were analyzed.The result shows that all three methods are capable of controlling the vehicle's attitude with respective advantage and disadvantage.This study provides a useful reference to the control law design of a RLV's flight control system.