中文摘要：

为解决现有旋磁激励压电俘能器动磁铁与定磁铁正对激励时易发生碰撞的问题,提出一种错位旋磁激励的压电俘能器,并进行了磁力耦合仿真分析以及动磁铁转速/径向激励距离/压电振子端部附加质量等对俘能器发电性能影响的测试试验。结果表明：动定磁铁错位配置可实现压电振子的有效激励,且存在多个使输出电压出现峰值的最佳转速;径向激励距离对最佳转速无影响,但对峰值电压影响较大,正/负向分别存在不同的最佳激励距离使峰值电压最大;附加质量及动磁铁数量对俘能器性能影响较大,随着附加质量增大,各阶最佳转速降低、电压峰值增大;随着动磁铁数量增加,最佳转速的阶数、转速值及其所对应的电压值都依次减小。

英文摘要：

To avoid the mutual impacts between the exciting magnet and that on the end of piezocantilever,apiezoelectric harvester excited by malposed rotary magnets was presented.Simulation and analysis of the magnetic coupling characteristics of the malposed magnets were carried out.The influences of rotary-speed/exciting-distance/proof-mass on energy generation performance were tested.The results show that the piezoelectric harvester excited by malposition magnets is feasible.There are multiple optimal rotary speeds for the generated voltage to achieve peak.Radial exciting distance exerts no influence on the optimal speeds,but great influence on the peak voltage.There are different positive/negative exciting distances for output voltages to achieve peak.The proof mass and the number of exciting magnets have great influences on the performance of the energy harvester.With the increasing of proof mass,the optimal rotary speeds of each order decrease,and the relative peak voltage increases.The orders of optimal speeds,the values of the optimal speeds,and the relative peak voltage decrease with the increasing of the number of exciting magnets.