平面双稳态柔性微机构的优化设计  

Optimal Design of In-Plane Bistable Compliant Micromechanisms

作　　者：李团结[1] 曹炎[1] 李世俊[1] 周小勇[1] 

机构地区：[1]西安电子科技大学,西安710071

出　　处：《机械科学与技术》2004年第6期709-711,756,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：陕西省自然科学基金项目;西安电子科技大学青年科研工作站基金项目资助

摘　　要：讨论了一种平面双稳态柔性微机构的设计问题。首先给出了机构稳定平衡位置的物理含义 ,建立了两种类型平面双稳态柔性微机构的伪刚体模型。提出了一种允许设计者随意指定稳定平衡位置点的具有较大自由度的优化设计方法 ,建立了优化数学模型及相应的约束准则 ,采用一种改进的遗传进化算法获得了全局最优解。根据所得的最优解对双稳态柔性微机构进行了分析 。This paper presents work on the design of a class of in plane bistable compliant micromecha nisms. Firstly, the physical nature of stable equilibrium positions of a mechanism is given. Then the pseudo rigid body models of the two classes of in plane bistable compliant micromechanisms are established. Based on these, an optimal method to design bistable compliant micromechanisms is presented, which provides more freedom and flexibility, allowing the designers to change the location of equilibrium points. Optimization model and guidelines of constraints are established, and a modified genetic algorithm is utilized to obtain the global optimal solution. The analysis of bistable compliant micromechanisms is done using the derived design parameters, the result verifies the effectiveness of the proposed method. Finally, some examples are given.

关 键 词：双稳态机构 柔性机构 微机构 遗传算法 

分 类 号：TH112.1[机械工程—机械设计及理论]