远程自主交会改进制导算法

给出了一种适用于中、远程自主交会的改进制导算法。建立了交会两飞行器的相对运动动力学模型;给出了可用于获取主、被动飞行器在惯性空间信息的轨道预报算法,并且本预报算法是基于轨道要素描述的,同时考虑了J2项引力摄动,具有较高精度。最后建立了用于优化制导指令速度的优化算法,和优化制导时间的燃料最优目标函数,优化后的指令速度可使主动飞行器更精确地到达预定交会点。给出的数值仿真算例显示,对于中、远程交会任务,单纯的C-W制导算法所带来的终端误差较大,而改进的交会制导算法可以十分明显地提高远程自主交会的制导精度。

Improved Guidance Algorithm for Remote Autonomous Rendezvous

This paper presents an improved guidance algorithm for remote autonomous rendezvous.The relative motion dynamics model is established to describe the relative motion of the two spacecrafts.Followed the dynamics model,an approach of the orbit prediction is introduced,which incorporates the effect of J2 perturbation.The improved guidance algorithm introduces two methods to optimize the transfer time and the necessary initial velocity respectively.The numerical simulation shows that the improved method can make the terminal error smaller for an active vehicle in the vicinity to a passive one from a long distance.