Stabilization of a wide-band nonlinear vibration energy harvester by using a nonlinear self-excitation circuit

Arata Masuda; Atsuko Senda

doi:10.1117/12.915443

27 March 2012 Stabilization of a wide-band nonlinear vibration energy harvester by using a nonlinear self-excitation circuit

Arata Masuda, Atsuko Senda

Author Affiliations +

Proceedings Volume 8341, Active and Passive Smart Structures and Integrated Systems 2012; 83411B (2012) https://doi.org/10.1117/12.915443
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

In this paper, a wide-band vibration energy harvester using a nonlinear hardening oscillator with self-excitation circuit is presented. A vibration energy harvester is one of the energy-harvesting devices that collects unused energy from vibrating environment. For the conventional linear vibration energy harvester, the resonance frequency is matched to the source frequency, and the mechanical Q factor is designed as large as possible to maximize the oscillator's amplitude. The large Q factor, however, bounds the resonance in a narrow frequency band, and the performance of the vibration energy harvester can become extremely worth when the frequency of the vibration source fluctuates. As is well known, the resonance frequency band can be expanded by introducing a hardening (or softening) nonlinear oscillator. However, it is difficult for the nonlinear vibration energy harvester to maintain the regenerated power constant because such nonlinear oscillator can have multiple stable steady-state solutions in the resonance band. In this paper, a control law that switches the load resistance between positive and negative values according to the instantaneous displacement and the velocity is proposed to give the oscillator a self-excitation capability, which ensures the oscillator entrained by the excitation only in the largest amplitude solution. Moreover, an adaptive adjustment of the control law is proposed to quicken the entrainment process. Numerical analysis shows that the nonlinear vibration energy harvester with resistance switching can maintain the large amplitude response even when the excitation frequency abruptly changes.

Citation Download Citation

Arata Masuda and Atsuko Senda "Stabilization of a wide-band nonlinear vibration energy harvester by using a nonlinear self-excitation circuit", Proc. SPIE 8341, Active and Passive Smart Structures and Integrated Systems 2012, 83411B (27 March 2012); https://doi.org/10.1117/12.915443

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