微机械陀螺仪解调相角在线自补偿方法  

On-line self-compensation of demodulation phase angle in micro-machined gyroscope

作　　者：丁柏会 贾佳 李宏生[1,2] DING Baihui;JIA Jia;LI Hongsheng(School of Instrument Science and Engineering,Southeast University,Nanjing 210096,China;Key Laboratory of Micro-Inertial and Advanced Navigation Technology of Ministry of Education,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学仪器科学与工程学院,江苏南京210096 [2]东南大学微惯性仪表与先进导航技术教育部重点实验室,江苏南京210096

出　　处：《传感器与微系统》2021年第10期24-26,31,共4页Transducer and Microsystem Technologies

基　　金：中央高校基本科研业务费专项资金项目。

摘　　要：提出了一种针对低品质因数、小频差微机械陀螺仪的解调相角在线自补偿方法,以降低正交误差对陀螺仪性能的影响。对陀螺仪输出信号进行分析,展示了解调相角误差对陀螺仪零偏性能的不利影响。对此设计了基于外部激励信号的解调相角在线自补偿方法,该方法可在线辨识解调相角,从而对解调参考信号进行相角调整。仿真和实验结果表明该相角补偿方法可有效提升微机械陀螺仪的零偏性能,零偏稳定性由补偿前115.257°/h降低到补偿后31.406°/h,降幅达到72.7%。An in-run demodulation phase angle compensation method for micro-machined gyroscope with low-quality factor and small frequency split is proposed,to reduce the effect of quadrature error on the gyroscope bias performance.Based on the analysis of the gyroscope signal output,the demodulation phase angle error and quadrature error have harmful contribution on the gyroscope bias performance.Therefore,an in-run self-compensation method based on an external excitation signal is utilized to compensate demodulation phase angle,which detects the in-run demodulation phase angle.The simulation and experimental results show that the phase angle compensation method significantly improves the bias performance of the micro-machined gyroscope.The bias stability is reduced from 115.257°/h to 31.406°/h after compensation with about 72.7%improvement.

关 键 词：微机械陀螺仪 解调相角 在线自补偿 零偏性能 

分 类 号：TN384[电子电信—物理电子学]