Architectural Engineering and Construction, Durham School of
Durham School of Architectural Engineering and Construction: Faculty Publications
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ORCID IDs
0000-0001-8134-4080
Document Type
Article
Date of this Version
2019
Citation
Sensors 2019, 19, 380
Abstract
Cantilever electrostatically-actuated resonators show great promise in sensing and actuating applications. However, the electrostatic actuation suffers from high-voltage actuation requirements and high noise low-amplitude signal-outputs which limit its applications. Here, we introduce a mixed-frequency signal for a cantilever-based resonator that triggers its mechanical and electrical resonances simultaneously, to overcome these limitations. A single linear RLC circuit cannot completely capture the response of the resonator under double resonance excitation. Therefore, we develop a coupled mechanical and electrical mathematical linearized model at different operation frequencies and validate this model experimentally. The double-resonance excitation results in a 21 times amplification of the voltage across the resonator and 31 times amplitude amplification over classical excitation schemes. This intensive experimental study showed a great potential of double resonance excitation providing a high amplitude amplification and maintaining the linearity of the system when the parasitic capacitance is maintained low.
Included in
Architectural Engineering Commons, Construction Engineering Commons, Environmental Design Commons, Other Engineering Commons
Comments
© 2019 by the authors.
Open access
doi:10.3390/s19020380