Abstract

This work developed a piezoelectric micro-beam based energy harvester laminated with light activated shape memory polymer (LASMP). With noncontact mechanism and dynamic Young’s modulus of LASMP, natural frequency of the energy harvester can be tuned during light exposure. Based on modified couple stress theory, the governing equation of the size-dependent micro-beam is derived via Hamilton’s principle. Analytic solution of natural frequency and power output of the micro-beam is presented. Influence of size effect and dynamic Young’s modulus of LASMP on natural frequency and power output is investigated. Present research suggested that application of LASMP in micro-engineering is potential and effective.

摘要

这项工作开发了一种层压有光活化形状记忆聚合物（LASMP）的基于压电微束的能量收集器。借助非接触机制和LASMP的动态杨氏模量，可以在曝光期间调整能量收集器的固有频率。基于改进的耦合应力理论，通过汉密尔顿原理推导了尺寸相关的微束的控制方程。提出了微束固有频率和功率输出的解析解。研究了LASMP的尺寸效应和动态杨氏模量对固有频率和功率输出的影响。目前的研究表明，LASMP在微工程中的应用是潜在和有效的。