电容式微陀螺自适应闭环驱动系统的研究  

Research on adaptive closed-loop drive system for capacitive micro-gyroscopes

作　　者：谭晓昀[1] 雷龙刚[1] 刘晓为[1] 

机构地区：[1]哈尔滨工业大学MEMS中心,黑龙江哈尔滨150001

出　　处：《传感器与微系统》2009年第10期35-38,共4页Transducer and Microsystem Technologies

基　　金：国家"863"计划资助项目(2008AA042201)

摘　　要：对微陀螺闭环驱动系统理论进行分析讨论,结合微陀螺结构特性和自适应锁相环特点,设计一种微陀螺自适应闭环驱动系统。利用数学工具Matlab分别建立Simulink传统的自动增益控制器(AGC)方式闭环驱动系统模型和自适应闭环驱动系统模型,对其进行系统性能对比分析。分析结果表明:微陀螺自适应闭环驱动系统建立时间比传统AGC方式闭环驱动系统建立时间缩短69%,系统频率偏差仅为1 Hz,频率稳定性是传统闭环驱动系统的38.46%,系统抗噪声能力优于传统闭环驱动系统。因此,采用自适应闭环驱动系统可以提高微陀螺的检测灵敏度。The closed-loop drive system theory of micro-gyroscope is discussed. Considering the characteristics of the micro-gyroscope＇ s structure and adaptive phase-locked loop, the adaptive closed-loop drive system for microgyroscope is designed. Based on the traditional AGC closed-loop drive system model and adaptive closed-loop drive system model,the performances of the closed-loop drive system are simulated and analysed by the Matlab math tools Simulink software. The analysis results show that compared with the traditional AGC closed-loop drive system, setting time of the adaptive closed-loop drive system shorten 69 %. The frequency difference between driving frequency and resonant frequency is only 1 Hz. The frequency stability is 38.46 % of the traditional closed-loop drive system. The SNR of the adaptive closed-loop system is better than the traditional closed-loop drive system. So the detection sensitivity of micro-gyroscope can be improved by using the adaptive closed-loop drive system.

关 键 词：自适应闭环驱动 微陀螺 锁相环 系统模型 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]