柔性铰链运动性能多目标优化设计

Multi-objective optimization for rotation capacity of flexure hinges

分析了表示柔性铰链运动性能的柔度矩阵.以影响其性能的关键因素即柔性铰链的结构参数为设计变量,提高柔性铰链的转动性能为目标,建立了其多目标优化模型,并给出了基于Powell内点惩罚函数法的直圆型柔性铰链优化设计实例;优化结果说明该方法的有效性和实用性.对优化前后柔性铰链的运动性能进行了分析比较;结果表明,当施加一确定力时,优化后柔性铰链的运动性能比优化前有了明显提高,达到了改善直圆型柔性铰链运动性能的目的.

The compliance matrix describing the rotation capacity of flexure hinges was analyzed. A multi-objective optimization model was established to enhance the rotation capacity of flexure hinges with the important factors influencing the rotation capacity of flexure hinges as design variables. The optimal design model by using Powell inner point penalty function method was presented, and the design example of a circular flexure hinge was optimized based on the model. The optimal result indicates that the method is valid and practicable. The comparison of rotation capacity between before and after optimization shows that the performance of the flexure hinge after optimization is better.