中国空间科学技术

中国空间科学技术

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载人飞船轨道舱泄压半经验动力学模型建立及分析

唐歌实;陈明;   

  1. 北京航空航天大学宇航学院;北京航天飞行控制中心;
  • 发布日期:2009-02-25

Empirical Dynamic Model for Deflation Process of Shen-Zhou Manned Spacecraft

Tang Geshi1,2 Chen Ming2(1 Beijing University of Aeronautics and Astronautics,Beijing 100191)(2 Beijing Aerospace Flight Control Center,Beijing 100094)   

  • Online:2009-02-25

摘要： 轨道舱泄压过程产生的扰动力是载人飞船轨道动力学模型中的主要误差源之一,泄压扰动的影响在沿迹方向上的误差可达几千米。针对轨道舱泄压过程建立了半经验动力学模型,并结合船载微重力加速度计测量数据及导航数据对三个模型参数进行求解。计算结果表明,返回制动开始点的轨道预报精度提高了一个量级,这说明模型的建立对于解决轨道舱泄压扰动的影响是合理有效的。

关键词: 轨道舱泄压, 轨道动力学, 轨道预报, 载人飞船

Abstract: One of the main error sources in orbit dynamic model of the ShenZhou manned spacecraft is due to the effect of deflation,which gives an extra force on the spacecraft.This effect introduces an error in orbit by the order of several kilometers at maximum in the transversal direction.An empirical dynamical model for the deflation process was developed and three model parameters were estimated based on onboard microgravity accelerometer and navigation data.It shows that the precision of orbit prediction is enhanced by over an order of magnitude,indicating that the model is a reasonable solution to the deflation process.