Method for eliminating acceleration effect of optic fiber gyroscope graduation factor

Abstract

The invention discloses a method for eliminating optical fiber gyro constant multiplier acceleration effect. The invention comprises the following steps: adding acceleration regulating connection in the output of optical fiber gyro, obtaining acceleration which is perpendicular to the optical fiber gyro sensitive axis plane by the accelerometer in the connection, obtaining the fitting acceleration effect polynomial function of optical fiber gyro constant multiplier from prior test, regulating the output of optical fiber gyro, eliminating the influence of optical fiber gyro constant multiplier acceleration effect; obtaining the fitting acceleration effect polynomial coefficient from the prior turning platform test, selecting a series of testing points with various axial direction valves, which deviate from the turning platform on the turning platform, obtaining constant multipliers and accelerations from every point by test and calculation, obtaining the fitting constant multiplier acceleration effect polynomial coefficient by the least squares technique. The method can effectively eliminate the effect of acceleration to the optical fiber gyro performance, improve resolve precision of the posture, position and others, and improve the dynamic property of the application system at last.

Description

technical field [0001] The invention relates to the optical fiber sensing technology in the optoelectronic technology, in particular to a method for eliminating the acceleration effect of the optical fiber gyroscope scale factor. Background technique [0002] Fiber optic gyro is a new type of angular velocity measuring instrument. Its working principle is a fiber optic interferometer based on the optical Segneck effect, that is, when the ring interferometer rotates, a phase difference proportional to the rotation rate is generated. By detecting the phase difference , the angular velocity of the system where the ring interferometer is located can be obtained. Due to the advantages of full solid-state, wide bandwidth and digital output with multiple protocols, the fiber optic gyroscope is widely used in navigation and attitude control and other application systems. [0003] The scale factor of the digital signal output by the fiber optic gyroscope and the proportional coeffic...

AI Technical Summary

Problems solved by technology

When the system is in static motion, the speed of the system remains unchanged, and the acceleration effect of the scale factor is zero; in practical applications, the system is more in a state of motion, and the inevitable acceleration and deceleration process will cause the scale factor of the output signal of the fiber optic gyroscope to vary with the system Acceleration changes, which affects the correct calculation of the acceleration signal and weakens the dynamic performance of the application system

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