考虑压电驱动元件布局的作动器拓扑优化设计

Topology optimization of actuators considering the distribution of piezoelectric driven components

工程中常需要设计各种各样的作动器以满足一定的驱动要求。本文采用拓扑优化的方法设计以压电材料为驱动的作动器。通过拓扑描述方法和RAMP(Rational Approximation of Material Properties)材料插值模型相结合的建模方式,建立了压电驱动元件布局与柔性机构构型协同设计的优化模型;以电压的作用下作动器在某一方向的输出位移最大为目标,设计压电驱动元件的最优布局以及与之相连接柔性机构的最优拓扑构型。文中算例的成功实现验证了本文方法的有效性。

It is desirable and important to des engineering applications. In this paper,a topo gna variety of actuators for certain driven requirements in ogy optimization method is presented for designing actuators driven by piezoelectric materials. By combining topology description function method and RAMP （Rational Approximation of Material Properties） material model, an optimization model simultaneously optimizing the distribution of piezoelectric driven component and layout of flexible mechanical structure is formulated. The goal is to design the layout of the flexible structure coupled to piezoelectric driven component and the position of the driven components that maximizes the output displacement in some specified direction. Numerical examples are presented to demonstrate the validity of the proposed approach.