Research on Dynamic Response of Bistable Vibration Energy Power Generation System Excited by Impulse
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摘要: 将双稳态振动发电系统与单自由度质量弹簧系统串联，建立了两自由度双稳态振动能量发电系统的力学模型和控制方程，借助数值仿真分析了矩形脉冲和半正弦脉冲激励的幅值和占空比对该发电系统动态响应的影响。绘制了两种脉冲激励下发电系统输出功率与非线性刚度比的关系曲线，得到了较大输出功率下的最佳非线性刚度比，并通过改变发电系统的质量比和调频比，分别获得了矩形和半正弦脉冲激励下发电系统可产生较大输出功率的结构参数配置范围。Abstract: The mechanical model and governing equations of the 2DOF bistable vibration energy electromagnetic power generation system are obtained by combining bistable vibration energy harvester and 1DOF mass spring damping system in a series pattern in this paper. The effects of the excitation amplitude and duty cycle of rectangular impulse and half sine impulse on the dynamic response are analyzed by simulations. The relation curves of the output power and nonlinear stiffness ratio under the two types of impulse excitation are got, and their optimal nonlinear stiffness ratios are obtained. The structural parameter configuration ranges of the mass ratio and tuning frequency ratio of the bistable vibration energy power generation system are obtained to generate more usable output power by varying the values of the mass ratio and tuning frequency ratio.
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