波纹梁夹持型双平行四边形柔性机构性能分析

为解决传统双平行四边形柔性机构中二级运动平台欠约束问题,设计了一种波纹梁夹持型对称双平行四边形柔性机构.首先,提出了一种基于正弦曲线的波纹梁结构,并将其安装在对称双平行四边形机构的2个二级平台之间;其次,建立了机构静力学解析模型,并利用拉格朗日方程建立了动力学模型;最后,利用有限元和实验方法对其静、动力学性能进行了仿真...

Performance analysis of parallelogram flexible mechanism clamped by corrugated beam

In order to solve the under-constraint problem of the secondary motion platform in the traditional double parallelogram flexible mechanism,a corrugated beam clamping symmetrical double parallelogram flexible mechanism is designed.First,a corrugated beam structure based on a sine curve is proposed and installed between the two secondary platforms of the symmetrical double parallelogram mechanism;secondly,an analytical model of mechanism statics is established,and a dynamic model is established using Lagrangian equations;finally,finite element and experimental methods are used to simulate and test its static and dynamic performance.The results show that the mechanism effectively restrains the secondary platform without changing the stiffness of the mechanism and the first-order frequency,and improves the high-order natural frequency of the double parallelogram mechanism,thereby effectively improving dynamic characteristics and ability to suppress vibration of the traditional double parallelogram mechanism.