东南大学学报（自然科学版）2011，Vol.41Issue(3)：526-532,7.DOI:10.3969/j.issn.1001-0505.2011.03.019
微机械陀螺仪反馈控制器鲁棒性分析及闭环接口检测电路设计
Robustness analysis of a type of feedback controller and design of closed-loop sensing circuit of micro-machined gyroscope
摘要
Abstract
Based on the analysis of micro-machined gyroscope force-balanced feedback sensing structure, a modification of the general Sigma-Delta force-balanced sensing scheme is proposed. Discretization of micro-machined gyroscope closed-loop sensing system is described. A type of output feedback controller, which can stabilize the system within finite time, is constructed based on Lyapunov stability theory, and the robustness of the controller is investigated. Overall system is realized with AMS 0.35 μm CMOS ( complementary metal oxide semiconductor) technology by Cadence tool. Main parts including front-end circuit, Sigma-Delta modulator and feedback controller are designed and simulated. Key characteristic of the system is compared with that of the force-balanced circuit improved by proportional-integral-derivative (PID) controller. The analysis results show that the modified closed-loop sensing system achieves a 106 dB SNR (signal to noise ratio) in gyroscope signal band, and restabilizing time after disturbance is within 130 ms, which is shorter than that of the sensing scheme with PID controller. Therefore, the closed-loop system optimized by output feedback controller demonstrates a better sensing performance than general type.关键词
微机械陀螺仪/静电力反馈检测/有限时间稳定/输出反馈控制/接口电路Key words
micro-machined gyroscope/ force-balanced feedback sensing/ finite-time stabilization/output feedback control/ interface circuit分类
交通工程引用本文复制引用
卢海曦,王寿荣,周百令..微机械陀螺仪反馈控制器鲁棒性分析及闭环接口检测电路设计[J].东南大学学报（自然科学版）,2011,41(3):526-532,7.基金项目
国家自然科学基金资助项目(60974116). （60974116）
