考虑复杂多响应问题的柔顺机构稳健优化设计

Robust Optimal Design of Compliant Mechanism of Considering Complex Multiple Response Problems

以细胞注射3-RRR柔顺并联微动平台为研究对象,针对柔顺并联机构多响应设计存在不稳定的难题,根据3-RRR柔顺并联微动平台沿X向、Y向平动和绕Z轴转动时的柔度关系,采用田口设计及蒙特卡洛仿真方法,在满足X向柔度具备较强稳健性的情况下,对微动平台Y向平动和绕Z轴转动时转动中心的柔度分别进行了迭代寻优,揭示了柔性铰链各种设计因子对微动定位平台多响应柔度的影响规律,找出了柔性铰链最佳的几何尺寸,为考虑不确定性扰动情形下柔顺机构复杂多响应问题的稳健优化设计提供了一种新的解决途径。最后通过实例验证了该方法的有效性。

Using the cell injection 3-RRR compliant parallel micromotion platform as the research object, in view of compliant parallel mechanism multiple response design that exists the problem of unstable, according to the flexibility relationships of the 3-RRR compliant parallel micromotion platform along the X,Y direction and the rotation around the Z axis, it used the taguchi design and monte carlo simulation methods, to meet the flexibility of the X direction has strong robustness, and revealed the influence law of multiple response flexibility with flexure hinge various design factors on micro motion positioning platform, the flexibility iterative optimization of micromotion platform along the Y direction translation and the rotation around the Z axis had did respectively, and the best geometry sizes of flexible hinge were find out, provided a new solution of robust optimization design with multiple response problems of compliant mechanism considering uncertainty disturbance situation. Finally the correctness and validity of the method was verified with an example.