科研之友
微信
新浪微博
Facebook
分享链接
摘要
To improve the working efficiency of piezoelectric vibration energy harvester under various energy environments, the response and performance of piezoelectric vibration energy harvester under hybrid excitations of basic excitation and galloping were studied. According to the Euler - Bernoulli elastic beam vibration theory，the distributed parameter model of piezoelectric cantilever beam under hybrid excitations was established. By establishing the electromechanical coupling reduced order model, the system electromechanical control equation of the first mode was obtained, and the analytical solution of the system response was derived by electromechanical decoupling method. The coupling relationship between the two kinds of hybrid excitations was established. The effects of load resistance and wind speeds on the system natural frequency and electromechanical damping were discussed. And the effects of load resistance， acceleration and wind speeds on the power generation performance were analyzed. The correctness of the theoretical model was verified. The results show that compared with the basic excitation, the hybrid excitation not only increases the system energy collection power but also broadens the frequency band.
- 单位
