In this study, a novel compact energy harvesting dynamic vibration absorber (EHDVA) with quasi-zero-stiffness (QZS) characteristics is engineered for both vibration suppression and energy harvesting under low frequency. The QZS EHDVA is composed of a negative stiffness magnetic spring (NSMS), a spiral flexure spring (SFS) and coils. Firstly, the analytical expressions of the force and stiffness of the NSMS are derived by using the equivalent magnetic charge method, and the restoring force of the SFS is analyzed with finite element method. The electromechanically coupled equations are then solved using the Harmonic Balance Method (HBM), and the effect of system parameters on both the performances of vibration suppression and energy harvesting is investigated in detail. Finally, the prototype of the QZS EHDVA is fabricated, and an experiment is carried out to verify the theoretical model. According to the testing findings, the QZS EHDVA is able to suppress vibration in the low frequency region between 3.7 Hz and 6.1 Hz. In addition, the maximum output power of 1.51 mW is achieved under a load resistance of 300Ω at a driving frequency of 4.5 Hz.

在这项研究中，设计了一种具有准零刚度 (QZS) 特性的新型紧凑型能量收集动态吸振器 (EHDVA)，用于低频下的振动抑制和能量收集。QZS EHDVA 由负刚度磁力弹簧 (NSMS)、螺旋挠性弹簧 (SFS) 和线圈组成。首先，利用等效磁荷法推导了NSMS的力和刚度的解析表达式，并利用有限元方法分析了SFS的恢复力。然后使用谐波平衡法 (HBM) 求解机电耦合方程，并详细研究系统参数对振动抑制和能量收集性能的影响。最后制作了QZS EHDVA的样机，并进行实验验证理论模型。根据测试结果，QZS EHDVA 能够抑制 3.7 Hz 至 6.1 Hz 之间的低频区域的振动。此外，在4.5 Hz的驱动频率下，负载电阻为300Ω时，可实现1.51 mW的最大输出功率。