Efficiency improvement of a cantilever-type energy harvester using torsional vibration

In-Ho Kim; Seon-Jun Jang; Jeong-Hoi Koo; Hyung-Jo Jung

doi:10.1117/12.2222019

15 April 2016 Efficiency improvement of a cantilever-type energy harvester using torsional vibration

In-Ho Kim, Seon-Jun Jang, Jeong-Hoi Koo, Hyung-Jo Jung

Proceedings Volume 9799, Active and Passive Smart Structures and Integrated Systems 2016; 97990N (2016) https://doi.org/10.1117/12.2222019
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2016, Las Vegas, Nevada, United States

Abstract

In this paper, a piezoelectric vibrational energy harvester utilizing coupled bending and torsional vibrations is investigated. The proposed system consists of a cantilever-type substrate covered by the piezoelectric ceramic and a proof mass which is perpendicularly connected to the free end of the cantilever beam by a rigid bar. While the natural frequency and output voltage of the conventional system are affected by bending deformation of the piezoelectric plate, the proposed system makes use of its twisting deformation. The natural frequency of the device can be significantly decreased by manipulating the location of the proof mass on the rigid bar. In order to validate the performance of the proposed energy harvester, numerical simulations and vertical shaker tests are carried out. It is demonstrated that the proposed energy harvester can shift down its resonant frequency considerably and generate much higher output power than the conventional system. It is, therefore, concluded that the proposed energy harvester utilizing the coupled bending and torsional vibrations can be effectively applied to low-frequency vibration situations.

Citation Download Citation

In-Ho Kim, Seon-Jun Jang, Jeong-Hoi Koo, and Hyung-Jo Jung "Efficiency improvement of a cantilever-type energy harvester using torsional vibration", Proc. SPIE 9799, Active and Passive Smart Structures and Integrated Systems 2016, 97990N (15 April 2016); https://doi.org/10.1117/12.2222019

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