摘要
为解决微系统的自供能问题,利用压电材料的压电效应将系统工作环境中的振动能转换成电能是一条有效途径。其中,压电悬臂梁具有结构简单、弹性好、能量传递能力强、易于加工等优点,因而成为压电能量采集器的一种理想选择。但设计过程中,由于结构响应特性与输出电压的未知性,造成了设计周期延长。为解决该问题,建立了压电式振动能量采集器机电耦合模型,并通过数值计算以完成结构输出位移和输出电压的求解。利用有限元软件对结构进行仿真分析,并得到不同几何尺寸对结构响应特性和输出性能的影响。加工了结构尺寸相同的原理样机,通过实验进一步验证数值计算与仿真分析的合理性、正确性和可靠性。最终实现设计过程的快速化、高效化。
The use of the piezoelectric effect of the piezoelectric material to change the vibration energy in the work environment into electrical energy is an effective way to solve the problem of self-powered for the micro-system. However, the unknown of the response characteristics and output vohage in the design process result in the extension of design cycle. The establishment of a electromechanical coupling model of the piezoelectric vibration energy harvester can solve this problem. The output displacement and voltage of the structure can be solved by numerical calculation. ANSYS can be used to simulate the structure and get the affection of different geometry to the response characteristics of the structure. The principle prototype machine with adjustable size is obtained by manufacture. Through experiments further verify the reasonableness, accuracy and reliability of numerical analysis and simulation. The ultimate realization of the design process fast and efficient.
出处
《机械设计与研究》
CSCD
北大核心
2015年第6期28-30,38,共4页
Machine Design And Research
基金
国家自然科学基金资助项目(51175395)
国家青年自然科学基金资助项目(51405357)
研究生自主创新基金资助项目(155218002)
关键词
压电效应
机电耦合模型
数值计算
ANSYS
piezoelectric effect
electromechanical coupling model
numerical calculation
ANSYS
