15 April 2016 Electromagnetic energy harvesting from a dual-mass pendulum oscillator
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Abstract
This paper presents the analysis of a type of vibration energy harvester composed of an electromagnetic pendulum oscillator combined to an elastic main structure. In this study, the elastic main structure connected to the base is considered as a single degree-of-freedom (DOF) spring-mass-damper subsystem. The electromagnetic pendulum oscillator is considered as a dual-mass two-frequency subsystem, which is composed of a hollow bar with a tip winded coil and a magnetic mass with a spring located in the hollow bar. As the pendulum swings, the magnetic mass can move along the axial direction of the bar. Thus, the relative motion between the magnet and the coil induces a wire current. A mathematical model of the coupled system is established. The system dynamics a 1:2:1 internal resonance. Parametric analysis is carried out to demonstrate the effect of the excitation acceleration, excitation frequency, load resistance, and frequency tuning parameters on system performance.
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Hongyan Wang, Jiong Tang, "Electromagnetic energy harvesting from a dual-mass pendulum oscillator", Proc. SPIE 9799, Active and Passive Smart Structures and Integrated Systems 2016, 979924 (15 April 2016); doi: 10.1117/12.2219198; https://doi.org/10.1117/12.2219198
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