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The Closed-loop Driving Method of Microgyroscope

XIAO Ding-bang,HOU Zhan-qiang,MAN Hai-ou,WU Xue-zhong,LI Sheng-yi (College of Mechatronics Engineering and Automation,National Univ.of Defense Technology,Changsha 410073,China)  
In order to achieve high excitation efficiency,a resonance loop for microgyroscope is designed based on phase control technology to generate drive mode resonance.In order to improve the stability of microgyroscope,a PID controller with best ITAE criterion is designed to keep the drive oscillation amplitude invariable.A closed-loop drive circuit is fabricated and tested.The results show that the oscillation frequency of the fabricated drive loop is very close to the drive mode frequency.With the adoption of PID controller,the variance rate of the drive oscillation amplitude is merely 0.1% in the temperature range of-40℃~80℃.
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