In order to improve the bias stability of the micro-electro mechanical system（MEMS） gyroscope and reduce the impact on the bias from environmental temperature,a digital signal processing method is described for impr...In order to improve the bias stability of the micro-electro mechanical system（MEMS） gyroscope and reduce the impact on the bias from environmental temperature,a digital signal processing method is described for improving the accuracy of the drive phase in the gyroscope drive mode.Through the principle of bias signal generation,it can be concluded that the deviation of the drive phase is the main factor affecting the bias stability.To fulfill the purpose of precise drive phase control,a digital signal processing circuit based on the field-programmable gate array（FPGA） with the phase-lock closed-loop control method is described and a demodulation method for phase error suppression is given.Compared with the analog circuit,the bias drift is largely reduced in the new digital circuit and the bias stability is improved from 60 to 19 °/h.The new digital control method can greatly increase the drive phase accuracy,and thus improve the bias stability.展开更多
TN252 2002064255菲涅耳波导的波导色散特性分析=Analysis on disper-sion characteristics of Fresnd waveguide[刊,中]/占恒正,扬方辉.王明华,江晓清(浙江大学信息与电子工程学系.浙江,杭州(310027))∥光电子·激光.—2002,13(1)....TN252 2002064255菲涅耳波导的波导色散特性分析=Analysis on disper-sion characteristics of Fresnd waveguide[刊,中]/占恒正,扬方辉.王明华,江晓清(浙江大学信息与电子工程学系.浙江,杭州(310027))∥光电子·激光.—2002,13(1).—16-19采用转移矩阵法对菲涅耳波导的波导色散特性进行了分析,讨论了波长。展开更多
基金The National Natural Science Foundation of China (No.60974116)the Research Fund of Aeronautics Science (No. 20090869007)Specialized Research Fund for the Doctoral Program of Higher Education(No. 200802861063)
文摘In order to improve the bias stability of the micro-electro mechanical system（MEMS） gyroscope and reduce the impact on the bias from environmental temperature,a digital signal processing method is described for improving the accuracy of the drive phase in the gyroscope drive mode.Through the principle of bias signal generation,it can be concluded that the deviation of the drive phase is the main factor affecting the bias stability.To fulfill the purpose of precise drive phase control,a digital signal processing circuit based on the field-programmable gate array（FPGA） with the phase-lock closed-loop control method is described and a demodulation method for phase error suppression is given.Compared with the analog circuit,the bias drift is largely reduced in the new digital circuit and the bias stability is improved from 60 to 19 °/h.The new digital control method can greatly increase the drive phase accuracy,and thus improve the bias stability.
文摘TN252 2002064255菲涅耳波导的波导色散特性分析=Analysis on disper-sion characteristics of Fresnd waveguide[刊,中]/占恒正,扬方辉.王明华,江晓清(浙江大学信息与电子工程学系.浙江,杭州(310027))∥光电子·激光.—2002,13(1).—16-19采用转移矩阵法对菲涅耳波导的波导色散特性进行了分析,讨论了波长。
