基于相位负反馈的振弦式陀螺驱动电路研究  

Research on Driving Circuit of Vibrating-string Gyro Based on Phase Negative Feedback

作　　者：陈志龙[1] 黄鸣 刘鹏 舒凯 CHEN Zhilong;HUANG Ming;LIU Peng;SHU Kai(College of Electronics and Information, Nanchang Institute of Technology, Nanchang 330044, China;School of Mechatronics & Vehicle Engineering, East China Jiaotong University, Nanchang 330013,China)

机构地区：[1]南昌理工学院电子与信息学院,江西南昌330044 [2]华东交通大学机电与车辆工程学院,江西南昌330013

出　　处：《压电与声光》2020年第4期533-539,共7页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(61663033)。

摘　　要：介绍了一种采用电磁驱动频率检测的振弦式陀螺。为了实现振弦式陀螺稳幅谐振,分析了振弦式陀螺驱动模态的动力学特性和电学特性。根据其特性设计了基于相位负反馈的闭环驱动系统,建立其Simulink系统模型,分析了驱动模态固有频率发生偏差时驱动系统的锁频稳幅性能。对闭环驱动系统进行了器件级电路实现与仿真。结果表明,陀螺稳幅起振时间约为1.5 s,稳定后频率抖动小于0.0206 Hz。最后对闭环驱动电路进行了实物制作与驱动测试,测试结果与仿真结果一致,验证了闭环驱动电路能够实现陀螺频率追踪与幅值稳定的控制要求。It introduces a vibrating-string gyro with electromagnetic driving frequency detection.In order to realize the amplitude stabilizing resonance of the vibrating-string gyro,the dynamic and electrical characteristics of the vibrating-string gyro driving mode are analyzed.The closed-loop drive system based on the phase negative feedback was designed according to the characteristics,and its Simulink system model was established,the frequency-locked amplitude stabilization performance of the drive system was analyzed when the natural frequency of the drive mode was deviated.The device-level circuit implementation and simulation of the closed-loop drive system were carried out.The results show that the gyro’s stable amplitude start-up time is about 1.5 s,and the frequency jitter after stabilization is less than 0.0206 Hz.Finally,the closed-loop drive circuit was fabricated and the drive test was carried out,the test results were consistent with the simulation results,which verified that the closed-loop drive circuit was able to achieve the control requirements of gyro frequency tracking and stable amplitude.

关 键 词：振弦式陀螺 相位负反馈 固有频率追踪 稳幅振动 

分 类 号：TN75[电子电信—电路与系统] TM15[电气工程—电工理论与新技术]