摘要
2016年,中国将要执行空间站与货运飞船的快速交会对接试验,该试验要求飞船起飞后6 h完成与空间站的交会对接。工程实践中需要对飞船进行多次远导控制,其间留给快速定轨的数据时长最少可能只有5 min,这对短弧定轨精度提出了较高要求。利用天宫一号在轨运行期间实测数据开展了快速测定轨试验,试验频繁轨控条件下5 min数据时长的快速测定轨精度。试验结果表明,不同条件下短弧定轨精度差异较大,这为快速交会对接试验带来了较大风险。为了提高短弧定轨精度,制定了利用轨控前后数据联合解算轨控从而增加定轨数据弧段的方法提高短弧定轨精度的定轨策略。分析结果表明,该定轨策略有效提高了短弧定轨精度,可满足快速交会对接试验轨道维持控制要求。
The rapid space rendezvous and docking experiment of the cargo spaceship with the space station will be carried out in 2016 in China. It requires that the whole rendezvous and docking process be finished within six hours after the lift-off of the cargo spaceship. It is challenging to use as little as 5 minutes arcs data to determine the precise orbit of the cargo vessel during the frequent long distance navigation controls. In this paper, a series of orbit determination accuracy analysis works were done by using 5 minutes Tiangong-1 measured data of various arcs. The results showed that the orbit determination accuracy varied greatly as the computing condition changed, this uncer- tainty is risky in our real task. In order to enhance the orbit determination accuracy, a new strategy using the whole arc data to solute orbit parameters during the course of orbit control was proposed. The analysis result shows it is a valid method to satisfy the orbit control and maintenance accuracy standard in the rapid rendezvous and docking task.
出处
《载人航天》
CSCD
2015年第1期44-47,共4页
Manned Spaceflight
关键词
天宫一号
快速测定轨
定轨策略
快速交会对接
Tiangong-1
rapid orbit determination
orbit determination strategy
rapid rendezvousand docking
