A multiple-degree-of-freedom piezoelectric energy harvesting model

• DOI: 10.1177/1045389x12449920
• Publication Date: 2012-06-08T01:51:02Z
• Authors: Lihua Tang; Yaowen Yang
• Keywords: Degree (music); Proof mass

Conventional vibration energy harvesters have been usually studied as single-degree-of-freedom models. The fact that such are only efficient near sole resonance limits their applicability in frequency-variant or random scenarios. In this article, a novel multiple-degree-of-freedom piezoelectric harvesting model is presented. First, two-degree-of-freedom analyzed, and its two configurations characterized. the first configuration, element placed between one mass base, second it masses. It shown former advantageous over latter since with slight increase of overall weight to model, we can achieve close effective peaks power response peak significantly enhanced magnitude. configuration then generalized an n-degree-of-freedom analytical solution derived. This provides convenient tool for parametric study design model. Finally, equivalent circuit proposed developed via analogy mechanical electric domains. With system-level simulation be performed evaluate system performance when sophisticated interface circuits attached.