Assessment method for optimal installation configuration of inertial measurement unit with two-frequency mechanically-dithered laser gyroscopes

A technology of inertial measurement unit and machine-shaking laser gyro, which is applied in the field of guidance and control and inertial navigation, can solve the problems of reduced reliability, reduced precision, and easy-to-interference circuits, so as to improve the accuracy and reliability of use, prolong the service life, highly operable effect
CN105547294AActive Publication Date: 2016-05-04NAT UNIV OF DEFENSE TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NAT UNIV OF DEFENSE TECH
Publication Date
2016-05-04

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Abstract

The invention discloses a dithering sensitivity-based assessment method for the dithering sensitivities of two-frequency mechanically-dithered laser gyroscopes, and belongs to the field of inertial navigation, guidance and control. The method comprises the steps that 1, the target dithering amplitudes of the two-frequency mechanically-dithered laser gyroscopes are set; 2, the driving voltage of the two-frequency mechanically-dithered laser gyroscopes is collected; 3, the actual dithering amplitudes of the two-frequency mechanically-dithered laser gyroscopes are collected; 4, the dithering sensitivities of the two-frequency mechanically-dithered laser gyroscopes installed on an inertial measurement unit under the different installation configurations are calculated; 5, the dithering sensitivities of the two-frequency mechanically-dithered laser gyroscopes under the different configurations are compared, and then the optimal installation configuration scheme of the inertial measurement unit with the two-frequency mechanically-dithered laser gyroscopes is obtained. When the method is used for designing the inertial measurement unit composed of the two-frequency mechanically-dithered laser gyroscopes, the configuration scheme with the most suitable dithering frequency and installation positions is selected, it is guaranteed that the inertial measurement unit can work in the best state, the using precision of the two-frequency mechanically-dithered laser gyroscopes is improved, and the service life of the two-frequency mechanically-dithered laser gyroscopes is prolonged.
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Description

technical field

[0001] The invention relates to an evaluation method for optimal installation and configuration of a two-frequency machine-jittered laser gyro inertial measurement unit based on shaking sensitivity, and belongs to the field of inertial navigation, guidance and control. Background technique

[0002] The laser gyroscope is a device for measuring angular rate and angle based on the Sagnac effect and composed of a ring laser resonator. Among the error sources of laser gyroscopes, the region-locking effect is one of the main error sources that limit the practical application of laser gyroscopes. The lock-in effect refers to the phenomenon that the output of the laser gyroscope is zero under the condition of low input angular rate. There are many ways to overcome the lock-in effect, such as rate bias, mechanical jitter bias, Zeeman bias, magnetic mirror bias and Faraday bias, etc. The basic idea is to make the working state of the laser gyroscope quickly cross the...

Claims

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