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Multiple Internal Resonances in MEMS Arch Resonators.pdf
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ArticleKAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) DivisionMechanical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2018-10-03Online Publication Date
2018-10-03Print Publication Date
2018-11Permanent link to this record
http://hdl.handle.net/10754/628881
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Micromachined shallow arch resonant beams have attracted significant attention thanks to their rich dynamical behavior, inherent nonlinearities, and the potential to excite various internal resonances. Currently, there is a lack of comprehensive experimental studies for the various types of internal resonances in arches and particularly at the micro and nano scales. Here, we aim to investigate and identify different types of internal resonances of an initially curved beam, electrothermally actuated and electrostatically driven, by electrical characterization techniques. Upon changing the electrothermal voltage of silicon micromachined arches, the second symmetric natural frequency of an arch is adjusted to near twice, three times, and four times the fundamental natural frequency, which gives rise to 2:1, 3:1, and 4:1 autoparametric resonances between the two modes. These resonances are demonstrated experimentally. We show various frequency-response curves of the total response around the excitation frequency and highlight the contribution of each mode before, during, and after the internal resonances. Allan-deviation results are also shown indicating enhanced frequency stabilization of the arch oscillation when experiencing internal resonances. These studies motivate further research in this direction to exploit internal resonances of micromachined resonators for practical applications, such as sensors and mechanical amplifier.Citation
Hajjaj AZ, Jaber N, Hafiz MAA, Ilyas S, Younis MI (2018) Multiple internal resonances in MEMS arch resonators. Physics Letters A. Available: http://dx.doi.org/10.1016/j.physleta.2018.09.033.Sponsors
This research has been supported through King Abdullah University of Science and Technology (KAUST) fund.Publisher
Elsevier BVJournal
Physics Letters AAdditional Links
https://www.sciencedirect.com/science/article/pii/S0375960118309939ae974a485f413a2113503eed53cd6c53
10.1016/j.physleta.2018.09.033