The dynamics characteristics and harvesting efficiency of parallel bi-stable nonlinear piezoelectric energy harvesters are studied.The coupling model of electromechanical system is established, and the simulations are carried out.The comparisons between the no-parallel and parallel energy harvesters in the edge of chaos and the harvesting efficiency are made.The results show that parallel bi-stable nonlinear piezoelectric energy harvester possesses higher efficiency and the bandwidth of efficient working frequency has obvious relationship with the bandwidth between the edges of chaos.%对并联的双稳态非线性悬臂压电俘能器的动力学和俘能特性进行了研究.建立了并联双稳态非线性悬臂压电俘能器的机电耦合方程.利用数值仿真方法,对非并联和并联的双稳态俘能器的混沌边缘及俘能效果进行了分析和比较.研究结果表明:并联双稳态非线性悬臂压电俘能器可以提高俘能效率;而其工作频带宽度与混沌边缘间的周期运动区域宽度相关.
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