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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Erturk, Alper Daniel, J. Inman |
| Abstract | The idea of supplying energy for low-power devices such as MEMS and remote sensors by converting the ambient vibrations to electrical energy through energy harvesters has been subject to many papers in recent years. One typical energy harvester is a cantilevered beam with one or more layers of piezoelectric material (PZT) connected to a harvesting circuit by means of electrodes. The literature includes attempts to provide the electromechanical model of this type of energy harvesters and one frequently used approach is the single-degree-of-freedom (SDOF) modeling which is only applicable for the case of excitation around the resonance frequency. In this work, the exact analytical solution of the base excitation problem is given for a clamped-free Euler-Bernoulli beam since the excitation of the harvester is generally due to its base motion in real life applications. The base motion is described by translation and small rotation and is not restricted to be harmonic in time. The general solution is then reduced to the case of harmonic base excitation for comparison with the corresponding SDOF model. It is shown that the commonly accepted form of the SDOF model may yield highly inaccurate results. A correction factor, which should also appear in the electromechanically coupled equations, is introduced for improving the SDOF model. |
| Sponsorship | Design Engineering Division and Computers and Information in Engineering Division |
| Starting Page | 769 |
| Ending Page | 778 |
| Page Count | 10 |
| File Format | |
| ISBN | 0791848027 |
| DOI | 10.1115/DETC2007-35440 |
| e-ISBN | 0791838064 |
| Volume Number | Volume 1: 21st Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C |
| Conference Proceedings | ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference |
| Language | English |
| Publisher Date | 2007-09-04 |
| Publisher Place | Las Vegas, Nevada, USA |
| Access Restriction | Subscribed |
| Subject Keyword | Electrodes Microelectromechanical systems Vibration Piezoelectric materials Circuits Resonance Excitation Sensors Energy harvesting Modeling Rotation |
| Content Type | Text |
| Resource Type | Article |
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