Influence of the Driving Waveform on the Open-Loop Frequency Response of MEMS Resonators With Nonlinear Actuation Schemes

This paper deals with the influence of the shape of the driving waveform on the frequency responses of microelectromechanical systems (MEMS) resonators under nonlinear actuation. Our models show that, at large oscillation amplitudes, these responses are strongly dependent on the shape of the actuati...

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Bibliographic Details
Published in:Journal of microelectromechanical systems 2016-08, Vol.25 (4), p.812-820
Main Authors: Brenes, Alexis, Juillard, Jerome, Bourgois, Laurent, Vinci Dos Santos, Filipe
Format: Article
Language:English
Subjects:
Actuation
Distortion
Electrostatic actuation
Electrostatics
Engineering Sciences
Frequency response
Harmonic analysis
Micro and nanotechnologies
Microelectromechanical systems
Microelectronics
Micromechanical devices
nonlinear dynamics
Nonlinearity
open-loop frequency response
Oscillators
pulses
Resonant frequency
Resonators
Shape
Signatures
Waveforms
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Summary:This paper deals with the influence of the shape of the driving waveform on the frequency responses of microelectromechanical systems (MEMS) resonators under nonlinear actuation. Our models show that, at large oscillation amplitudes, these responses are strongly dependent on the shape of the actuation waveform so that the nonlinear frequency response is not the system signature, but the system signature under a specific driving waveform. The case of a MEMS resonator electrostatically driven with a sine-, pulsed-, or square-wave voltage is specifically addressed. Our models and simulations, supported by experimental evidence, predict counterintuitive phenomena resulting from the distortion of the actuation waveform by the displacement-dependent electrostatic nonlinearity. This paper emphasizes that this issue should not be overlooked in order to perform quantitative MEMS characterization in the nonlinear regime.
ISSN:1057-7157
1941-0158
DOI:10.1109/JMEMS.2016.2560260