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VIBRATION ELEMENT COUPLED WITH NON-LINEAR FORCE TO IMPROVE NON-RESONANT FREQUENCY RESPONSE

United States Patent Application

20110048133
A1
View the Complete Application at the US Patent & Trademark Office
Embodiments of the invention couple a non-linear force to a vibration element such as a piezoelectric cantilever to introduce chaotic, i.e., non-resonant vibration in the vibration element and thereby improve the non-resonant response of the vibration element. By doing so, the vibration element is responsive to a wider frequency range of vibrations and thus may be more efficient in scavenging energy in environments where the vibration frequency is not constant, e.g., in environment subject to multi-mode or random vibration sources.
Lin, Ji-Tzuoh (Louisville, KY), Alphenaar, Bruce (Louisville, KY)
UNIVERSITY OF LOUISVILLE RESEARCH FOUNDATION, INC. (Louisville KY)
12/ 871,524
August 30, 2010
GOVERNMENT RIGHTS [0002] The invention was supported in whole or in part by Contract/Grant No. DE-FC26-06NT42795 from the Department of Energy and Contract/Grant No. DAAB07-03-D-B010/TO-0198 from the United States Navy. The Government has certain rights in the invention.