Designing, modelling and testing of vibration energy harvester with nonlinear stiffness

Ondrej Rubes; Zdenek Hadas

doi:10.1117/12.2264769

30 May 2017 Designing, modelling and testing of vibration energy harvester with nonlinear stiffness

Ondrej Rubes, Zdenek Hadas

Proceedings Volume 10246, Smart Sensors, Actuators, and MEMS VIII; 102460W (2017) https://doi.org/10.1117/12.2264769
Event: SPIE Microtechnologies, 2017, Barcelona, Spain

Abstract

This paper is focused on a design of a piezoelectric vibration energy harvester with an additional nonlinear stiffness. Common piezoelectric energy harvesters consist of a cantilever with piezoceramic layers and a tip mass for tuning up the operation frequency. This system is excited by mechanical vibrations and it provides an autonomous source of electrical energy. A linear stiffness of the cantilever has very narrow resonance frequency bandwidth which makes the piezoelectric cantilever sensitive to tuning up of the resonance frequency. It could be tuned only for one narrow vibration frequency bandwidth. The piezoelectric vibration energy harvester with nonlinear stiffness could provide the resonance frequency bandwidth wider and it allows energy harvesting from the wider bandwidth of excitation vibrations. The additional nonlinear stiffness is implemented by using a set of permanent magnets. A simulation and an experiment were performed and the results show a wider resonance bandwidth. However, it depended on direction of vibration frequency sweeping. The frequency bandwidth is more than three times wider but there is only a half resonance amplitude of oscillations. That means that the maximal harvested power is lower but the average harvested power around resonance frequency was higher which was the goal of this research.

Conference Presentation

Citation Download Citation

Ondrej Rubes and Zdenek Hadas "Designing, modelling and testing of vibration energy harvester with nonlinear stiffness", Proc. SPIE 10246, Smart Sensors, Actuators, and MEMS VIII, 102460W (30 May 2017); https://doi.org/10.1117/12.2264769

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available