PROJECT TITLE :

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

ABSTRACT:

This paper reports an acceleration sensing technique based mostly on 2 weakly coupled resonators (WCRs) using the phenomenon of mode localization. When acceleration acts on the proof plenty, differential electrostatic stiffness perturbations can be applied to the WCRs, resulting in mode localization, and so, mode shape changes. Thus, acceleration will be sensed by measuring the amplitude ratio shift. The proposed mode localization with the differential perturbation methodology results in a sensitivity enhancement of a factor of 2 than the common single perturbation technique. 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 above the shift in resonance frequency (~1035 ppm/g) among the measurement vary of ±one g. The measured resolution primarily based on the amplitude ratio is 0.619 mg and the nonlinearity is ~three.fivep.c in the open-loop measurement operation.


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