A three-axis integrated fiber optic gyroscope inertial measurement device based on light source cold backup and its compensation and installation method

Abstract

The invention discloses a triaxial integrated optical fiber gyroscope inert measurement device based on optical source cold standby, and a compensation and installation method. The triaxial integrated optical fiber gyroscope inert measurement device comprises a body, two triaxial shared optical sources, an optical source driving and refrigerating circuit, three framework-free optical fiber loop meter heads, three optical fiber gyroscope signal processing and interference circuit digital boards, a system signal processing and interface circuit digital plate, a secondary power supply module, a frequency and voltage conversion simulation circuit, three electric connectors and a reference mirror. The three optical fiber loops share an optical source, and a standby cold optical source is provided, thus the reliability is high; the installation error correction method used by the invention can effectively reduce the triaxial cross coupling; the circuit boards are installed on a lateral cover and an upper cover for the convenience of radiation protection design; meanwhile, the favorable heat radiation is realized; framework-free optical fiber loops are used, the adaptability of a magnetic environment and a radiation environment is improved.

Description

Technical field [0001] The invention relates to a three-axis integrated long-life miniaturized fiber optic gyroscope inertial measurement device, in particular to a miniaturized, highly reliable, and long-lifetime vehicle used for spacecraft navigation, guidance and control, and adopts zero offset compensation and installation error correction methods An optical fiber gyroscope inertial measurement device belongs to the technical field of inertial measurement. Background technique [0002] As a symbol of high-tech development, spacecraft plays an extremely important role in my country's national defense construction. In the future, local warfare under high-tech conditions puts forward high requirements on the ability to obtain information. The attitude stability of aerospace is the prerequisite and guarantee for the effective execution of various tasks such as aiming and docking. Among them, the inertial instrument is the attitude control system. Key equipment, which directly af...

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Problems solved by technology

[0004] In the prior art, the fiber optic gyro inertial measurement device mostly adopts the design scheme of three-axis independent work, which can measure the attitude of the spacecraft's three axes relative to the inertial space, but this design scheme does not use redundant design, especially the attenuation of the light source will affect the gyro performance, when any one of the axes fails, it cannot provide the attitude of the three axes relative to the inertial space, and the reliability is low; in addition, the existing optical fiber ring structure adopts a skeleton structure, and this design can be used at high In the low temperature environment, the performance of the fiber ring will be affected due to the asynchronous deformation of the skeleton and the fiber

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