球状关节是的人类上肢骨骼可以在肩部自由旋转，这也是汽车车轮在转向柱的操控下转向的关键所在。
Ball and socket joints let your arm bones rotate at the shoulders and also allow the wheels of your car to be turned through the steering column.
与自由驾驶相比，上肢制动使得乡村和城市路段上的驾驶过程更加小心，对于速度和横向移位的调整能力减弱。
Limb immobilisation led to more cautious rural and urban driving, with less adjustment of speed and lateral road position than when unrestricted.
结论上肢中28个自由度中，当合理地选择其中8 ~9个自由度时，即可恢复上肢的大部分功能。
Conclusion By properly choosing 8-9 among 28 freedoms of arm, an artificial limb can mainly restore the function of arm.
本文采用类人气动肌肉，设计了一种双自由度的类人上肢。
The design of a 2 degrees of freedom imitating human upper extremity is proposed in this thesis.
本文采用类人气动肌肉，设计了一种双自由度的类人上肢。
The design of a 2 degrees of freedom imitating human upper extremity is proposed in this thesis.
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