压电悬臂梁振动能量收集仿真与试验验证

基于压电陶瓷的振动能量收集器以其结构简单、清洁环保及易于微型化等诸多优点受到广泛关注。利用压电陶瓷的正压电效应,根据机电理论和结构动力学理论,采用模态法建立了压电悬臂梁的双向耦合分布参数模型,仿真分析了外激励频率和外接负载对压电能量收集器输出电压特性的影响,设计制作了铝制悬臂梁,并进行了地面振动和能量收集试验,试验结果与理论仿真吻合较好,验证了理论建模的正确性。试验结果表明,单个压电片的能量收集电压最大为73 V/N。

Simulation and test verification of piezoelectric cantilever vibration energy harvester

Piezoelectric ceramic vibration energy harvester has attracted great attention for its simple structure,environment protection,easy miniaturization and other advantages.According to piezoelectric effect,a double-coupled distributed parameter model was established using mode method by combination of electromechanical theory and structural dynamics theory.Simulation analysis of effect of excitation frequency and load on output voltage of piezoelectric energy harvester was performed.Al-cantilever energy harvester was made to perform ground vibration and energy harvesting test.The experimental results are in good agreement with the numerical simulation,which verifies the correctness of theoretical modeling.Experimental results show that the max voltage output of a single piezoelectric patch is 73 V/N.