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在内编队系统中,内卫星在外卫星的封闭腔体内自由飞行,其轨道是纯引力轨道.由于腔体内温度的不均匀和内卫星与腔体的相对运动,腔体内的残余气体对内卫星产生干扰作用.本文基于自由分子流理论推导了残余气体分子对内卫星的干扰作用表达式,包含了辐射计效应、气体阻尼作用.同时,对腔体和内卫星构成的系统进行传热分析,得到了腔体内壁和内卫星表面的温度分布;对内编队保持控制进行仿真,得到了内卫星的相对运动速度.根据较为真实的温度分布和相对运动速度,计算了内卫星受到的残余气体作用力.计算结果表明,在内编队当前设计下,辐射计效应量级为1011ms2,气体阻尼量级为1015ms2,残余气体的干扰作用主要表现为辐射计效应.
In the inner formation system, the inner satellite is free to fly in the enclosed cavity of the outer satellite, and its orbit is a pure gravitational orbit. Due to the uneven temperature in the cavity and the relative motion of the inner satellite and the cavity, the residual gas in the cavity is generated by the inner satellite Interference effect.In this paper, the expression of interference effect of residual gas molecules on internal satellites is deduced based on free molecular flow theory, which includes radiometer effect and gas damping effect.At the same time, the heat transfer analysis of the system composed of cavity and internal satellite is obtained, The temperature distribution on the inner wall of the cavity and the surface of the inner satellite was simulated.The simulation of inner formation keeping control was performed to get the relative velocity of the inner satellite.The residual gas force on the inner satellite was calculated based on the more accurate temperature distribution and the relative velocity The calculation results show that under the current design of internal formation, the effect of the radiometer is 1011ms2 and the gas damping is 1015ms2. The interference of the residual gas mainly manifests as radiometer effect.