Effect of potential shape and excitation spectrum on power harvested from ambient vibration
Author(s)Chan, Jasmine H. (Jasmine Hei)
Massachusetts Institute of Technology. Department of Mechanical Engineering.
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In recent years, there have been experimental developments in energy harvesting from ambient vibrations in small-scale sensing. The ultimate goal is to replace batteries in these sensors. Linear systems have a narrow bandwidth, but ambient vibrations occur over a potentially broad range of frequencies. Nonlinear systems-in particular, bistable systems have a wide bandwidth. The objective of this thesis is to understand the dependence of power harvested on the shape of the potential-in the transition from linear to bistable. A single degree-of-freedom mathematical model was developed and simulated in MATLAB over varying operating conditions and potential function parameters. The findings from this thesis support experimental results that nonlinearity improves the amount of power that is harvested.
Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, June 2015.Cataloged from PDF version of thesis. "February 2015."Includes bibliographical references (pages 24-25).
DepartmentMassachusetts Institute of Technology. Department of Mechanical Engineering.
Massachusetts Institute of Technology