太阳跟踪的方法主要有两种，光电跟踪和视日运动轨迹跟踪。
There are mainly two ways to track the sun, photoelectricity track and sun angle track.
研究了其中两个自由度的运动轨迹跟踪控制策略，并将其应用于电机样机的控制。
Control strategies for the two DOF trajectory following are studied and applied to the prototype USM.
机器人通过奇异位形时的可行运动求解及如何准确地跟踪和实现给定的运动轨迹是机器人技术中急待解决的关键技术问题。
Resolution of the feasible motions of manipulators at singular configurations and accurately tracking the specified trajectory is one of the important technical problems in robotics.
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