电容式微陀螺自适应闭环驱动系统的研究

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1Hz，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。

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

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 micro-gyroscope 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.