重庆大学学报：自然科学版2011，Vol.34Issue(10)：136-141,6.
微机械振动陀螺闭环自激驱动理论分析及验证
Theoretic analysis and verification of the closed-loop self-oscillation for an MEMS gyroscope
摘要
Abstract
By analyzing the requirement of the closed-loop control for the vibratory gyroscope,the behaviour of the self-oscillation system with automatic gain control was analyzed with averaging method to achieve system stability and stable equilibrium.The theoretic analysis and experiment show that the reference voltage must be larger than a critical value;the larger the reference voltage is,the larger the signal-noise-ratio is;the system phase error will cause the resonance frequency drift and decrease the vibrating amplitude;different constants of the low pass filters result in different time to achieve the stable states.The experiment shows the frequency accuracy of the close-loop self oscillation system is about ±8ppm in 10 minutes and vibration amplitude is about 0.1% error in an hour.关键词
陀螺/自激振荡/平均法/自动增益/相位偏差Key words
Gyroscope/Self-oscillation/Averaging method/Automatic gain control/Phase rebalance error分类
航空航天引用本文复制引用
刘恒,刘显学,张凤田,苏伟,张富堂..微机械振动陀螺闭环自激驱动理论分析及验证[J].重庆大学学报：自然科学版,2011,34(10):136-141,6.基金项目
国家自然科学基金资助项目 （）
中国工程物理研究院科学技术发展基金资助项目 （）
