可重复使用运载器复合控制研究

Research on Hybrid Control for Reusable Launch Vehicle

可重复使用运载器再入过程中飞行范围广,参数变化剧烈,具有不确定性问题,所以需要同时使用RCS和气动舵面对飞行器进行姿态控制。针对RLV再入和不同执行机构的特点,首先把RCS和气动舵两套执行机构简化一套控制系统,提高自动驾驶仪设计效率,之后提出了一种根据动压和攻角进行控制指令分配的方法,通过动压和攻角得到气动舵面的控制效率,从而完成气动舵和RCS之间控制指令分配,完成RCS到气动舵的控制过渡。最后在Matlab环境下建立了运载器俯仰通道仿真模型,通过仿真结果验证了此复合控制方法的可行性,实现了攻角指令的精确跟踪。

Based on characteristics of aero surface and RCS, a hybrid control allocation method was presented to specify aero surface deflections and jet firings according to dynamic pressure and the angle of attack. RCS and aero control surface were simplified to one kind of control system, which improves engineer＇s efficiency. The simulation model of the pitch channel of RLV was established with Matlab/Simulik. The simulation results show that this hybrid controller has high tracking performance and can meet the controller requirements.