NONLINEAR OSCILLATOR FOR VIBRATION ENERGY HARVESTING

摘要

An oscillator apparatus and method for vibration energy harvesting includes a nonlinear oscillator (e.g. piezoelectric, magnetic or liquid oscillator) configured in association with a potential energy profile to enhance a desirable nonlinear effect with a larger displacement and a wider spectrum response. A cantilever beam associated with a vibrating structure generates a mechanical energy in response to vibration forces. A mechanical-to-electrical power converter can be coupled to the nonlinear oscillator to convert the mechanical power into an electrical power. The frequency response of the nonlinear oscillator adapts to varying ambient vibrations and auto-tunes with respect to the ambient vibration change for wireless and MEMS applications.