The capacitance variation of capacitive accelerometer as a function of vibratory movement relative frequency is presented using a developed model validated by simulation and experimental tests. The damping rate effect on accelerometer capacitance variation is studied for four damping rate values. The first value is that of accelerometer used in the experimental tests, the second and third are taken from the recent works and the fourth is the value proposed in this work. A comparative study has been made to mount our improvements on the capacitive accelerometer performances by the comparison between the proposed accelerometers in the recent works. Finally, a new capacitive accelerometer with improved parameters is proposed having many benefits over the existing accelerometers. These benefits are: appropriate choice of damping rate (equal to 0.68), very low measurement error (limited to 0.5%), high accuracy (equal to 99.5%), low consumption of electrical energy and high sensitivity and reliability.
Analog Integrated Circuits and Signal Processing – Springer Journals
Published: Apr 11, 2017
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