112 自励発振特性を有する1自由度非線形振動子を用いた振動発電

概要

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This study concerns a electromagnetic vibration energy harvester with a nonlinear oscillator. The nonlinear oscillator can have multiple stable steady-state responses in resonance band typically the large and small amplitude solutions depending on the initial condition. We introduce a self-excitation circuitwith a variable resistance which varies from negative to positive as function of the induced voltage in order to enable the oscillator entrained by the excitation only in the large amplitude solution. This controlled resistance enables the oscillator to be entrained by the excitation in a large amplitude solution. In this paper, the matching condition of the load resistance for the nonlinear vibration energy harvester is mainly discussed. It is shown that the optimal load resistance is derived in a simplified form based on the approximated solution obtained by the averaging method.
一般社団法人日本機械学会の論文
2011-09-05