Three axis optical fibre gyro system integrated mounting cage

Abstract

The invention relates to an integral mounting skeleton of a triaxial fiber optic gyro scope system. A plurality of groups of mounting holes are arranged on the mounting skeleton, each group of mounting holes are respectively used to install fiber optic gyro scopes, an accelerometer, a light source, a circuit board and a vibration damper. The fiber optic gyro scopes are three, form mutual space, and are orthogonally arranged on the outer surface of the mounting skeleton, the mounting skeleton adopts a hollow hexahedron frame structure, each group of mounting holes are symmetrically arranged, and mounting lug bosses are arranged on the positioning end surface of the mounting holes. An accelerometer hole is arranged in the mounting skeleton. The quality of the mounting skeleton is very small when enough rigidity and strength are guaranteed; the degree of deviation between the mass center of an inertia measuring unit and a geometric mounting center is very small; simultaneously the temperature compensation and the control scheme of each component of the inertia measuring unit are enabled to be executed; and the manufacturing cost is lowered.

Description

technical field [0001] The invention relates to a supporting and fastening mounting frame, in particular to a mounting frame integrating a three-axis optical fiber gyroscope system. Background technique [0002] Fiber optic gyro is a new type of angular velocity sensor based on the Sagnac effect. Compared with mechanical gyroscopes, it has the advantages of all solid state, insensitivity to gravity, and fast startup; compared with ring laser gyroscopes, it has no high-voltage power supply. , no mechanical vibration and other advantages; in addition, it also has the advantages of light weight, long life and low cost, and has broad application prospects in military fields such as aviation, spaceflight, and navigation, as well as civil fields such as geology and oil exploration. The current typical structural form is: three independent single-axis fiber optic gyro subsystems are used to measure the angular velocity or position of the rotation axis of three orthogonal space coor...

AI Technical Summary

Problems solved by technology

The current integrated structure of the three-axis fiber optic gyro inertial measurement unit cannot meet the above requirements at the same time

That is, the existing technology has the following disadvantages: the overall mass is large, and the dynamic response characteristics are not good in shock and vibration environments; the center of mass of the entire inertial measurement unit deviates relatively from the geometric center, which seriously affects the dynamic measurement accuracy of the system; The complexity of the process and the arrangement of each component affect the temperature field distribution of the inertial measurement unit, which is not conducive to the temperature compensation and control of each component

[0004] The installation skeleton of the three-axis fiber optic gyro inertial measurement unit is a very important part for the whole system. The existing installation skeleton of the three-axis fiber optic gyro inertial measurement unit is a board-wall structure with a large mass. Its dynamic response characteristics are not good

The arrangement of the installation holes of each component makes the overall center of mass of the entire inertial measurement unit after installation deviate greatly from the geometric installation center, which seriously affects the dynamic test accuracy of the system

Moreover, each fiber optic gyroscope is in full contact with the installation surface of the installation frame, and the installation is complicated, which affects the temperature field distribution of the inertial measurement unit, which is not conducive to the temperature compensation and control of each component

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