Higher order modes excitation of electrostatically actuated clamped-clamped microbeams: Experimental and analytical investigation

Nizar Jaber, Abdallah Ramini, Armando A.A. Carreno, Mohammad I. Younis

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

In this study, we demonstrate analytically and experimentally the excitations of the higher order modes of vibrations in electrostatically actuated clamped-clamped microbeam resonators. The concept is based on using partial electrodes with shapes that induce strong excitation of the mode of interest. The devices are fabricated using polyimide as a structural layer coated with nickel from the top and chrome and gold layers from the bottom. Experimentally, frequency sweeps with different electro-dynamical loading conditions are shown to demonstrate the excitation of the higher order modes of vibration. Using a half electrode, the second mode is excited with high amplitude of vibration compared with almost zero response using the full electrode. Also, using a two-third electrode configuration is shown to amplify the third mode resonance amplitude compared with the full electrode under the same electrical loading conditions. An analytical model is developed based on the Euler-Bernollui beam model and the Galerkin method to simulate the device response. Good agreement between the simulation results and the experimental data is reported.

Original languageEnglish (US)
Article number025008
JournalJournal of Micromechanics and Microengineering
Volume26
Issue number2
DOIs
StatePublished - Jan 6 2016

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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