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建立了自旋稳定卫星姿态摄动的数值分析方法及模型,对重力梯度力矩作用下自旋卫星自旋轴相对于地心惯性系进动和章动以及赤经和赤纬的变化进行了仿真分析。对重力梯度力矩引起的自旋稳定卫星姿态摄动的演化规律进行了研究。指出在重力梯度力矩的作用下:自旋轴指向绕轨道面法线进动;章动角速度远小于进动角速度;轨道角速度越大,星体相对于地心惯性系的进动角速度和章动角速度越大,赤经和赤纬的变化率越大;自旋角速度越大,星体相对于地心惯性系的进动角速度和章动角速度越小,赤经和赤纬的变化率越小。
The numerical analysis method and model for the spin-stabilized satellite attitude perturbation are established. The effects of the gravity gradient moment on the precession and the nutation of the satellite in the geocenter and the changes of the right ascension and the declination are simulated analysis. The evolution of the spin-stable satellite attitude perturbation caused by the gravity gradient moment is studied. It is pointed out that under the action of the gravitational gradient moment, the spin axis points forward normal to the orbital plane. The angular velocity of the nutation is far less than the precession angular velocity. The larger the orbital angular velocity, the precession angular velocity and the nutation angular velocity The greater the rate of change of the AOD and the declination, the larger the spin angle is. The smaller the rate of change of the ROD and the declination is, the smaller the precession angular velocity and the nutation angular velocity of the satellite relative to the geocentric inertial system.