引言在航天器的运动方面存在两个很重要的动力学问题。其中大家都明白的是航天器质心运动的轨迹,它服从经典的开普勒定律。但是航天器并非像开普勒在研究行星体运动时所假定的那样是质点。航天器具有一定的体积,因此它们具有一定的惯量。故一个卫星在其轨道运行中可能出现绕其质心的转动运动,即通常所 Introduction There are two important dynamics in spacecraft motion. One of the things that we all understand is the trajectory of the spacecraft’s mass-heart movement, which obeys the classical Kepler’s law. But the spacecraft is not a particle, as Kepler assumed when studying planetary motion. Spacecraft have a certain volume, so they have a certain inertia. Therefore, a satellite in its orbital motion may appear around its center of mass rotation, that is,