An Acceleration Sensing Method Based on the Mode Localization of Weakly Coupled Resonators

Hemin Zhang, Boyang Li, Weizheng Yuan, Michael Kraft, Honglong Chang

科研成果: 期刊稿件文章同行评审

168 引用 (Scopus)

摘要

This paper reports an acceleration sensing method based on two weakly coupled resonators (WCRs) using the phenomenon of mode localization. When acceleration acts on the proof masses, differential electrostatic stiffness perturbations will be applied to the WCRs, leading to mode localization, and thus, mode shape changes. Therefore, acceleration can be sensed by measuring the amplitude ratio shift. The proposed mode localization with the differential perturbation method leads to a sensitivity enhancement of a factor of 2 than the common single perturbation method. The theoretical model of the sensitivity, bandwidth, and linearity of the accelerometer is established and verified. The measured relative shift in amplitude ratio (∼ 312162 ppm/g) is 302 times higher than the shift in resonance frequency (∼ 1035 ppm/g) within the measurement range of ±1 g. The measured resolution based on the amplitude ratio is 0.619 mg and the nonlinearity is ∼ 3.5% in the open-loop measurement operation.

源语言英语
文章编号7383224
页(从-至)286-296
页数11
期刊Journal of Microelectromechanical Systems
25
2
DOI
出版状态已出版 - 4月 2016

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