载人运载火箭干扰在线补偿制导方法研究

Real-time Estimation and Compensation of Disturbance for Manned Launch Vehicle

由于干扰引起大推力运载火箭入轨前箭体姿态与最佳推力方向产生偏离,致使降低了入轨精度。为实现精确入轨,需对未知干扰进行在线估计和补偿。提出了姿态角偏差反馈和舵偏角反馈两种补偿方案,论述了两种方案的可行性。然后以姿态角偏差反馈为例给出具体实现步骤和三种姿态角偏差的在线估值方式。最后,给出仿真结论。结果表明,采用姿态角偏差反馈方式实现干扰在线补偿能够显著提高火箭的入轨精度。

The deflection of attitude and direction of the manned launch vehicle caused by disturbance before it goes into orbit may lead to a loss of precision. Two compensation methods, namely the attitude angle error feedback method and rudder feedback method, are proposed to improve the precise attitude control of the launch vehicle. Taking the former one as an example, the realizing approach and three means of real-time compensation are presented. Simulation result shows that the attitude angle error feedback method can compensate the uncertain disturbance effectively, and improve the precision of launch vehicle.