A compliant electrothermal microgripper design and size optimization

method was proposed herein.First of all,the compliant mechanism of microgripper was selected based on type synthesis of kinematic chain and pseudo-rigid-body

method.Then,with the element division of the compliant mechanism,the stiffness model

 was established.Finally,the geometric size of the microgripper was optimized.

The design and size optimization of a compliant microgripper driven by a V-shaped electrothermal actuator was presented to describe this method.The optimal results analysed by the finite element software-ANSYS satisfy the design requirements.The comparisons

between optimal results and manual adjustment ones indicate that the former have better performance and the method is efficient and reliable.

microgripper, compliant mechanism, pseudo-rigid-body, size optimization

提出了一种柔性电热驱动微夹钳的设计与尺寸优化方法：首先基于机构的类型综合方法和伪刚体概念选择微夹钳的柔性机构,然后对柔性机构进行单元划分以建立其刚度模型,进而对其几何尺寸进行优化设计。对一种由V形电热驱动器驱动的柔性电热微夹钳进行了设计与尺寸优化。为了验证方法的合理性,利用ANSYS软件对优化结果进行仿真分析并对仿真结果进行了对比。分析表明,优化结果能够满足设计要求,从而证明了设计方法的高效率和可靠性。

微夹钳, 柔性机构, 伪刚体, 尺寸优化