Motion amplification using a flextensional compliant mechanism for enhanced energy harvesting

Mohammed Ali Abdelnaby; Mustafa Arafa

doi:10.1117/12.2215000

15 April 2016 Motion amplification using a flextensional compliant mechanism for enhanced energy harvesting

Proceedings Volume 9799, Active and Passive Smart Structures and Integrated Systems 2016; 97990M (2016) https://doi.org/10.1117/12.2215000
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2016, Las Vegas, Nevada, United States

Abstract

In vibration-based energy harvesting, ambient vibration often occurs in such small amplitudes that it cannot be used to drive electrical generators directly. To maximize the amount of output power, the input motion is usually amplified before being used for power generation. This work presents a non-resonant piezoelectric energy harvester that relies on a compliant mechanism to amplify a given persistent input motion in order to enhance the power output. The device can be used in situations where a small cyclic relative motion occurs between two surfaces, and where a device can be fitted to extract energy. The use of a compliant mechanism, as opposed to conventional gear drives or linkages, alleviates problems of excessive clearances, friction and power losses. A finite element model is developed to investigate the effect of the various design parameters on the system performance in terms of the amplification ratio, stiffness and output voltage. Findings of the present work are verified both numerically and experimentally on a cam-driven polymer mechanism. A parametric study is conducted to investigate the most influential variables in an attempt to optimize the design parameters for maximum power output. A magnetically bistable piezoelectric beam, driven by the compliant mechanism, is finally presented and provides substantially greater amounts of output power.

Citation Download Citation

Mohammed Ali Abdelnaby and Mustafa Arafa "Motion amplification using a flextensional compliant mechanism for enhanced energy harvesting", Proc. SPIE 9799, Active and Passive Smart Structures and Integrated Systems 2016, 97990M (15 April 2016); https://doi.org/10.1117/12.2215000

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