基于虚拟目标点和椭圆弹道理论，提出了一种在自由段机动变轨的新方法。
Based on the virtual target point and the ellipse trajectory theory, a new maneuver method in the free - flight phase is presented.
本文针对卫星在轨维护任务，建立了卫星自维护的地面遥操作演示平台，对基于虚拟现实和局部自主的空间机器人遥操作进行了研究。
In this dissertation, the ground demonstration platform of satellite self-serving teleoperation is built, and virtual reality and local autonomy based space robot teleoperation is investigated.
可以实现虚拟应答器、虚拟信号机，减少轨旁设备及维护工作量，大大降低系统成本。
It can reduce the cost of the train positioning system greatly by reducing trackside equipments and workload of maintenance.
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