TY - JOUR
T1 - Multiple internal resonances in MEMS arch resonators
AU - Hajjaj, Amal
AU - Jaber, Nizar
AU - Hafiz, Md Abdullah Al
AU - Ilyas, Saad
AU - Younis, Mohammad I.
N1 - KAUST Repository Item: Exported on 2021-02-19
Acknowledgements: This research has been supported through King Abdullah University of Science and Technology (KAUST) fund.
PY - 2018/10/3
Y1 - 2018/10/3
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/628881
UR - https://www.sciencedirect.com/science/article/pii/S0375960118309939
UR - http://www.scopus.com/inward/record.url?scp=85054440815&partnerID=8YFLogxK
U2 - 10.1016/j.physleta.2018.09.033
DO - 10.1016/j.physleta.2018.09.033
M3 - Article
AN - SCOPUS:85054440815
VL - 382
SP - 3393
EP - 3398
JO - Physics Letters A
JF - Physics Letters A
SN - 0375-9601
IS - 47
ER -