This paper presents, an analytical model of piezoelectric vibration energy harvester consists of Brinson shape memory alloy (SMA) plate which can tune the resonant frequency. As the energy harvester should be tuned to excitation frequency in order to drive the maximum power, the temperature of SMA is varied to tune the natural frequency of the composite beam. In addition to SMA it also consists of piezoelectric layer and substructure layer. Using Euler–Bernoulli beam assumption, the expressions for frequency response of voltage, current and power outputs with temperature are obtained. From parametric study, it is observed that the tuning of natural frequency is 25–26%, for first three modes of vibration in short and open circuit conditions.

本文提出了一种压电振动能量收集器的解析模型，该模型由Brinson形状记忆合金（SMA）板组成，可以调谐谐振频率。由于应将能量采集器调整到激励频率以驱动最大功率，因此SMA的温度会发生变化以调整复合梁的固有频率。除SMA外，它还由压电层和子结构层组成。使用Euler–Bernoulli束假设，可获得电压，电流和功率输出随温度的频率响应表达式。从参数研究中可以看出，对于短路和开路条件下的前三种振动模式，固有频率的调谐率为25–26％。