Fluctuation Error of Double Deflection Angle of Elliptical Parameters of Hemispherical Resonant Gyroscope
LIU Xue
CAO Huiliang
HE Shaowei
CHEN Gang
LIU Yupeng
Abstract：The whole angle mode hemispherical resonant gyroscope has extremely high dynamic characteristics,but the distur-bance error of the elliptical parameters of the harmonic oscillator is caused by the uneven circumferential damping of the harmonic oscillator and the mismatch of circuit channel gain caused by the processing technology.In order to solve this problem,a distur-bance error compensation method is proposed.Firstly,the ellipse parameter model of harmonic oscillator with uneven circumferen-tial damping and the influence of demodulation program on ellipse parameters are derived when the channel gain is mismatched.Sec-ondly,a time-sharing circuit and compensation scheme which can suppress the disturbance error of ellipse parameters of harmonic oscillator are proposed.Finally,the method is used to compensate the disturbance error of ellipse parameters of harmonic oscillator,and the effectiveness of the method is verified by experiments.The experimental results show that the long-axis energy fluctuation of the gyro is reduced from 5％to 0.875％,which is 82.5％lower than the same period last year.The output nonlinearity is reduced from 907.44 ppm to 168.04 ppm,which is 81.47％lower than the same period last year.And the scale factor nonlinearity is reduced from 998 ppm to 215.56 ppm,which is 78.4％lower than the same period last year.
Keywords：hemispherical resonant gyroscopevirtual Coriolis forcerate integration gyroscopeself-compensationcir-cumferential damping error
Publication Date：2025-12-20
Online Publishing Date：2026-03-23(First online date of this platform, not the publication date of the document)
Pages：5( 51-55 )