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Fiber gyroscope north seeker indexing mechanism based on four-position north seeking method

A fiber optic gyro and indexing mechanism technology, applied in the inertial field, can solve the problems of large volume and mass, low and complicated rotation and positioning accuracy of the fiber optic gyro north finder, and achieve reduced volume and weight, enhanced stability, and improved positioning The effect of precision

Inactive Publication Date: 2012-06-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical structure design of the existing north finder is relatively complicated, the volume and mass are relatively large, and the rotation positioning accuracy of the fiber optic gyro north finder based on the four-position north finding method is not high

Method used

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  • Fiber gyroscope north seeker indexing mechanism based on four-position north seeking method
  • Fiber gyroscope north seeker indexing mechanism based on four-position north seeking method
  • Fiber gyroscope north seeker indexing mechanism based on four-position north seeking method

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Embodiment Construction

[0011] The principle of the four-position north-finding method is that the fiber optic gyroscope collects the earth's rotation angular rate components in four directions with a difference of 90 degrees, and eliminates the zero bias and drift trend of the fiber optic gyroscope through calculation, and finally calculates the reference axis and north direction of the fiber optic gyroscope north finder. angle.

[0012] To realize the north-seeking function based on the four-position method, the indexing mechanism is required to drive the fiber optic gyroscope to accurately rotate to the four positions of the test, and the positioning mechanism needs to be locked to ensure the stability and consistency of the test position. Therefore, the fiber optic gyroscope north finder The indexing mechanism needs to have accurate positioning and stable locking functions. This design is based on the self-designed mechanical structure, which uses the transmission gear of the rotating motor and t...

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Abstract

The invention discloses a fiber gyroscope north seeker indexing mechanism based on four-position north seeking method. According to the invention, functions, such as indexing, locking, unlocking and the like, of the indexing mechanism are realized by controlling a rotation motor and a locking motor and detecting signals of a rotation motor encoder and a photoelectric sensor, thus, accurate location of the indexing mechanism at four special positions is implemented, and the fiber gyroscope north seeking function based on the four-position method is implemented consequently; the fiber gyroscope north seeker indexing mechanism is small in volume and low in weight, meets the requirements on accurate location of the four-position north seeking method and improves the stability and the repeatability of the fiber gyroscope north seeker indexing mechanism.

Description

technical field [0001] The invention belongs to the technical field of inertia, and in particular relates to an optical fiber gyroscope north-finder indexing mechanism based on a four-position north-finding method. Background technique [0002] The geographic north at a point on the earth is the north tangent direction of the meridian at that point, that is, the tangent direction on the horizontal plane pointing to the North Pole at that point on the earth. The north angle of a certain direction at a certain point on the earth's surface or in the earth or above the earth refers to the angle between the projection of the direction on the horizontal plane at that point and the geographic north. The process of determining the north angle by some method is called north finding. [0003] The north finder is generally designed with the principles of magnetic north finding (electronic compass), gyro north finding, accelerometer north finding, radio north finding, etc. The fiber op...

Claims

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Application Information

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IPC IPC(8): G01C19/72
Inventor 于俊杨建华彭星星戴昊周一览刘承
Owner ZHEJIANG UNIV
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