摘要
本文根据交会相对运动方程，给出动力学方程的解析解，推导出安全接近的最佳方位，并给出轨迹选择的数学表达式和计算步骤，从而为今后空间交会对接接近轨迹和保持点的选择提供理论依据．
Desplats ct al in 1989 [1], Wang et al in 1992 [2] and Upadhyay et al in 1992 [3] each presented a fault-tolerent navigation and control method to meet the requirments of safety during Rendezvous and Docking (RVD) mission. Their schemes require not only knowledge of rendczous dynamics and accurate gUidance information, but also continued working of propulsion system. The authors propose a different method to ensure safety in RVD mission. This method requires no continued working of propulsion system nor guidance information. The authors envision that spaceship may drift freely in a' safe trajcctory' without colliding with the space station. The authors present RVD dynamics equations (8a￣ 8c) and its analytic solution equations (15a-15f), from which we draw the conclusion: the spaceship may safely approach the space station from either the station's lower front side or from its upper rear side. From equations (15a￣ 15f), we can determine if the initial position and initial velocity will lead to safe trajectory' or not. In the paper six steps arc given for such a determination. If docking condition is not satisfied, the way to avoid collision is simply shutting off the propulsion system provided that' safe trajectory' is certain. As a result, the fuel consumption is reduced and the design of the Guidance Navigation Control (GNC) system for spaceship is greatly simplified.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
1994年第3期365-369,共5页
Journal of Northwestern Polytechnical University
基金
国家教委博士点基金
关键词
对接
安全轨迹
航天器
空间交会
rendezvous and docking, safe trajectory, guidance navigation and control
