摘要
多自由度柔顺机构在微动精密定位和精密操作等领域有广泛的应用,因而研究多自由度柔顺机构的拓扑优化方法就显得十分必要。给出了一种多输入多输出柔顺机构拓扑优化设计的新方法。首先,推导了描述多输入多输出柔顺机构柔性的互应变能公式和描述机构刚性的应变能公式,研究了抑制耦合输出的策略,进一步给出了描述输出耦合效应的计算公式,在此基础上建立了考虑抑制输入输出耦合效应时柔顺机构的多目标拓扑优化设计模型。其次,基于改进的优化准则法给出了优化模型的有效求解算法。最后,通过算例说明了该方法的正确性和有效性,研究结果表明,拓扑优化后柔顺机构可以按照预定的要求运动,其输出耦合现象得到了有效抑制。
Multiple degree-of-freedom compliant mechanisms are widely used in the fields of micro-positioning and micro-manipulation. So it is highly necessary to study the topology optimization method for this kind of mechanism. A new topology optimization method of compliant mechanisms with multiple inputs and multiple outputs are presented. Firstly, the expressions of the mutual potential energy and the strain energy which indicate the flexibility and the stiffness of the multiple inputs and multiple outputs mechanism, respectively, are developed. The suppression strategy of input and output coupling terms is studied, and the expression of the output coupling terms is further developed. On the basis of the expressions, a multi-objective optimization model with input and output coupling terms suppression is developed. Secondly, based on the modified optimal criteria method, a computational procedure for the solution of the optimization model is presented. Finally, a numerical example is presented to show the validity of the new method. Simulation results show that the compliant mechanism can be deformed in the desirable manner and the coupling output displacements are suppressed significantly by using the presented method.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2006年第3期162-165,共4页
Journal of Mechanical Engineering
基金
国家自然科学基金(50375051)
高等学校优秀青年教师教学科研奖励计划
广东省自然科学基金(036548
05006494)
教育部科学技术重点项目(104149)
广东省科技攻关(2004B10201026)
广州市科技攻关(053J208001)
出国留学人员起动基金资助项目
关键词
柔顺机构
拓扑优化
输出耦合
多输入多输出
Compliant mechanism
Topology optimization
Output coupling terms
Multiple inputs and outputs