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根据工程多维振动模拟的需要,设计了一种非对称全柔性3-RRRP微动并联激振台机构。在普通非对称3-RRRP并联机构基础上,将机构中的普通关节全柔性化,形成新型全柔性微动并联机构,在全柔性并联机构的主动件处施加单自由度的压电陶瓷激振器,设计出全柔性的多维微动激振台,经理论分析,发现该振动台具有三平移的微振动模拟输出。最后,对之进行了ADAMS软件仿真模拟,模拟结果显示,此种全柔性多维微动激振台可以以单层结构实现不同方向单自由度的平动振动模拟,也可以实现多维(二自由度或三自由度)微动振动的模拟输出,且激振输入与振动输出运动学完全解耦,具有相同的振动规律与振动频率,容易控制。
According to the requirement of engineering multi-dimensional vibration simulation, an asymmetric fully flexible 3-RRRP micro-parallel shunt excitation mechanism was designed. Based on the common asymmetric 3-RRRP parallel mechanism, the common joints in the mechanism are fully flexibilized to form a new all-flexible micro-motion parallel mechanism. A single degree of freedom piezoelectric ceramics excitation is applied to the active parts of the all-flexible parallel mechanism Designed a fully flexible multidimensional fretting vibration excitation platform, the theoretical analysis found that the vibration table has three translational micro-vibration analog output. Finally, the simulation of ADAMS software is carried out. The simulation results show that this fully flexible multidimensional fre- quency vibration platform can simulate single-degree-of-freedom translational motion with single-layer structure and multi-dimensional (two degrees of freedom Or three degrees of freedom) fretting vibration analog output, and the excitation input and vibration output kinematics completely decoupled, with the same vibration and vibration frequency, easy to control.