一种基于PWM技术的微机械陀螺闭环驱动电路设计  

Design of closed-loop driving circuit for MEMS gyroscope based on PWM technology

作　　者：孙冬娇[1] 孟瑞丽[1] 刘恒[1] 

机构地区：[1]南京信息工程大学电子与信息工程学院,江苏南京210044

出　　处：《现代电子技术》2013年第16期98-100,104,共4页Modern Electronics Technique

基　　金：国家自然科学基金资助项目(41075026)

摘　　要：针对微机械振动陀螺驱动控制电路中的幅频控制要求,提出了在高品质因数下,基于PWM技术的陀螺自激驱动控制方案,并建立了系统行为分析模型。鉴于系统的高阶非线性,采用平均周期法分析了系统的行为,根据理论分析设计了闭环驱动电路。理论分析和实验表明:闭环系统是稳定的,改变占空比可以调节振动幅度;在上电随机噪声下,自激振动幅度在1 h内向上漂移约为0.02%。In order to meet the requirement of amplotude frequency control in the driving control circuit of MEMS gyroscope,a gyroscope self-oscillation driving control scheme based on PWM technology is proposed under the condition of high quality factor.An analysis model of the system behavior was built.Because of the high-order nonlinear for the whole system,the averaging method is adopted to analyze the system behavior.The closed-loop driving circuit was designed according to theoretical analysis.The theoretical analysis and experiment show the closed-loop system is stable and the vibration amplitude can be controlled by changing the duty ratio;in the power-on random noise,the maxim drift error of the self-oscillation vibration amplitude is about 0.02% in 1 h.

关 键 词：陀螺 自激 恒幅振动 PWM 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]