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		机械臂臂杆刚度主动控制下的末端振动特性研究$^{\bf 1)}$
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			RESEARCH ON VIBRATION CHARACTERISTICS OF THE MANIPULATOR END UNDER ACTIVE CONTROL OF ARM STIFFNESS$^{\bf 1)}$
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| 图3. 机械臂运动过程中的受力分析图 | 
| Fig.3. The force analysis during the movement of the manipulator | 
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