摘要
以减小全柔性并联机构中最大应力为目标,通过约束优化算法,并结合ANSYS仿真,研究了3-DOF 4 RRR过驱动并联机构中柔性铰链的优化问题.通过ANSYS建立了全柔性机构的有限元模型,并进行了力学性能分析,给出了机构的性能图谱;建立了全柔性机构中柔性铰链的参数优化模型,采用MATLAB对柔性铰链的最小铰链厚度t和铰链半径R进行优化,并通过ANSYS仿真对优化结果进行检验.检验结果证明,当输出位移一定时,对柔性铰链进行优化后的机构的最大应力比优化前的机构小.
The optimization of flexure hinges of a 3-DOF 4 RRR redundantly actuated parallel mechanism is investigated with restriction optimizing method and ANSYS simulation for reducing the maximum stress in the full compliant parallel mechanism. The paper sets up the finite element model of the full compliant mechanism, analyses dynamics performance and gives deforming and stress figures with ANSYS. Then, it sets up the optimization model of flexure hinges of the full compliants mechanism, optimize the minimum thickness t and the radius R of hinges with MATLAB and analyses the result with ANSYS simulation. The result demonstrates that the maximum stress in the optimized mechanism is smaller than the non-optimized one. All the methods shown above can be used in simulation and optimizing flexure hinges of other full compliant mechanisms.
出处
《北方工业大学学报》
2007年第1期20-27,共8页
Journal of North China University of Technology
关键词
全柔性
并联机构
柔性铰链
优化
full compliant
parallel mechanism
flexure hinges
optimization
