Modeling of a magnetic levitation energy harvesting system attaching a linear oscillator under multi-frequency excitation and its output power’s influencing parametric analysis
WANG Zuyao1,DING Hu2,CHEN Liqun2,3
1. School of Science, Zhejiang Institute of Science and Technology, Hangzhou 310023, China;
2, Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China;
3, Department of Mechanics, Shanghai University, Shanghai 2004444, China
Abstract：Here,nonlinear dynamic behaviors of a magnetic levitation energy harvesting system attaching a linear oscillator were studied under multi-frequency excitation. The nonlinear dynamic equations of this electromagnetic-mechanical coupled model were approximately solved using the harmonic balance method and the arc-length extension method. In addition,the approximate analytical results were verified with a direct numerical simulation. The results showed that with increase in the mass ratio of this energy harvesting system,resonance peaks of its middle magnet’s average power amplitude-frequency response under multi-frequency excitation increase from two peaks to four ones,the resonance peaks’amplitudes decrease,but their bandwidths are wider; adjusting the system’s parametric damping ratio and coupling coefficient can optimize intensities and bandwidths of resonance peaks to enhance the vibration energy harvesting effect.
王祖尧1，丁虎2，陈立群2, 3. 多频激励下添加线性振子磁悬浮能量采集系统建模及其输出功率影响参数分析[J]. 振动与冲击, 2018, 37(17): 225-229.
WANG Zuyao1,DING Hu2,CHEN Liqun2,3. Modeling of a magnetic levitation energy harvesting system attaching a linear oscillator under multi-frequency excitation and its output power’s influencing parametric analysis. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(17): 225-229.
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