低轨重力卫星轨道的精确确定是获得精密地球重力场模型的前提，而精密重力场模型又是获得高精度定轨结果的保证。
On the other hand, the precision gravity model is important guarantees for obtaining high precision orbiting results using the dynamic or reduced-dynamic orbit determination method.
建立了小卫星相对轨道和姿态的误差动力学模型，根据作业任务和姿态指向要求确定了小卫星相对轨道和姿态的期望运动；
Positional and attitude error dynamics model of small satellite relative to a target satellite was derived, then the desired relative orbit and desired attitude of small satellite were designed.
解决了基于ANSYS软件的原子滑车轨道的强度分析的关键问题，如高速滑车的受力模型，轨道的建模方法、载荷和边界条件的确定。
The related key technologies are solved , such as the roller coaster force model, the track modeling method, the load and boundary determination.
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