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本文建立了考虑各种偏差和带有步进辐射计的一般双自旋卫星的动力学模型,并引入平主轴坐标系概念,由线性分析给出摆动运动及章动运动的规律。通过引入瞬时主轴系,并考虑了辐射计偏心的影响,导出了辐射计步进过程产生的章动运动的表达式,最后将线性分析结果与非线性模型数学仿真进行了对比,结果表明两者相当一致。
In this paper, the dynamics model of general double-spin satellites with various deviations and step radiometers is established and the concept of flat-spindle coordinate system is introduced. The laws of oscillatory motion and nutation motion are given by linear analysis. By introducing the instantaneous main shaft system and taking into account the influence of the radiometer eccentricity, the expression of the nutation movement induced by the radiometer’s step-in process is derived. Finally, the linear analysis results are compared with the nonlinear model mathematical simulation. The results show that both Pretty consistent.