本文主要对六自由度摇摆试验台的系统设计、运动学理论、位姿误差及控制方法四方面进行分析和研究。
The major research works completed in this dissertation includes: six free-degree swing platform system design, kinematics theory, pose error analysis and control methods.
方钻杆补心的内剖面与方钻杆的外部形状(四方钻杆或六方钻杆)完全匹配，但稍微要大于方钻杆补心的尺寸，以便方钻杆能够上下自由运动。
The kelly bushing has an inside profile matching the kelly's outside profile (either square or hexagonal), but with slightly larger dimensions so that the kelly can freely move up and down inside.
运动员智慧的提升，需从道德素质、文化素质、经验累积、自我内省四方面得以加强。
There are four aspects for developing the athlete's wisdom, moral quality, cultural quality, accumulation of experience and introspection.
校舍呈中空四方形，中央为运动场。
The school buildIngs formed a hollow square, with a playground In the middle.
校舍呈中空四方形，中央为运动场。
The school buildIngs formed a hollow square, with a playground In the middle.
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