逆压电效应对串联非线性压电俘能系统的影响

逆压电效应将电量转变为机械运动。将多个俘能器以串联电路相连接，逆压电效应会使各个俘能器的运动状态发生变化，从而影响到整个俘能系统的性能。在建立了两个俘能器串联系统的机电耦合数学模型基础上，利用数值仿真的方法，研究了逆压电效应对系统动力学及俘能效果的影响。研究表明，只有当所有俘能器均为周期运动时，才能保证各个俘能器为周期运动，并在大振幅周期激励下，系统的平均输出功率达到最大，系统的俘能效果最好。如果有一个俘能器为混沌运动，则其他俘能器要么为混沌运动，要么为伪周期运动，系统的俘能效果会受到不同程度的影响。串联电路的参数对系统的俘能效果有明显的影响。

The Influence of Converse Piezoelectric Effect on Serial Nonlinear Piezoelectric Energy Harvesting System

The converse piezoelectric effect transforms the electricity into the mechanical motion. By connecting several energy harvesters in series circuit, the inverse piezoelectric effect will change the motion state of each energy harvester, thus influencing the performance of the entire energy harvesting system. Based on the electromechanical coupling model of two series systems of energy harvesters, the influence of the converse piezoelectric effect on the system dynamics and energy harvesting efficiency is analyzed by numerical simulation. The results show that the motion of each harvester is periodic provided that the motions of all the harvesters in the system are periodic, and the best performance will be achieved under the circumstance that all the harvesters are excited with larger amplitude. When the motion of one harvester is chaotic, the motions of other harvesters are either chaotic or pseudo periodic motion, and the performance of the system is affected to some different extents. The parameter of the series circuit has significant impacts on the performance of the system.