Accession Number : ADA584786


Title :   MEMS-Based Waste Vibrational Energy Harvesters


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Hogue, Daniel B ; Gregory, Sarah M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a584786.pdf


Report Date : Jun 2013


Pagination or Media Count : 75


Abstract : The piezoelectric effect is a phenomenon where strain on a piezoelectric crystal structure causes potential difference at its ends. By merging piezoelectric materials and microelectromechanical systems (MEMS), mechanical vibration could cause the necessary displacement in MEMS to create a potential difference that could be used to power electronic devices. Developing new sustainable energy sources and using energy more efficiently is at the forefront of several research initiatives and is a clear priority for the Department of the Navy s strategic planning. This thesis aims to design a vibrational energy harvesting MEMS device to harness vibrational waste energy with the goal of producing power for naval applications. The development and widespread use of vibrational harvesting MEMS would aid the effort to meet each of these goals in the Department of the Navy. Any shore based, seagoing, or expeditionary mechanical platform could serve as a kinetic energy source for vibration energy harvesting MEMS. This thesis investigates the physics, materials, design, optimization, and microfabrication process in the creation of such a device. Time-dependent finite element models for two designs have been developed, simulating electrical power output. Microfabrication processes for the designs have also been developed.


Descriptors :   *MICROELECTROMECHANICAL SYSTEMS , *VIBRATION , ENERGY , FINITE ELEMENT ANALYSIS , HARNESSES , PIEZOELECTRIC MATERIALS


Subject Categories : Electrical and Electronic Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE