A closed-loop drive circuit for microgyroscopes with high amplitude stability

Xiaoyingu Li, Sujuan Nan, Honglong Chang, Guangmin Yuan, Bin Bai

科研成果: 期刊稿件文章同行评审

摘要

A common closed-loop driving scheme was improved to enhance the control precision of microgyroscope. Based on the theory of self-oscillation, the loop gain was calculated in a closed-loop driving system in which the phase angle and gain are decoupled. Furthermore the circuit parameters were optimized through the comparisons of the amplitude-frequency characteristics in different situations. After the optimization, the driving forces were able to be controlled by only one variable, which made the circuit debugging much more easier. Experimental results showed that the standard deviation of the amplitude and frequency were improved from 1.029 V and 0.014 6 Hz to 0.793 V and 0.003 3 Hz, respectively. It proved that the presented circuit scheme could improve the stability of drive frequency and the amplitude effectively.

源语言英语
页(从-至)1458-1461
页数4
期刊Chinese Journal of Sensors and Actuators
23
10
DOI
出版状态已出版 - 10月 2010

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