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Mangneto null bias testing and system-level compensating method of laser gyro inertial navigation system

A technology of inertial navigation system and laser gyro, which is applied in the field of magnetically induced zero bias test and system level compensation of laser gyro inertial navigation system

Inactive Publication Date: 2017-02-01
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for testing and system-level compensation of the magnetically induced zero bias of the laser gyro inertial navigation system, in order to improve the laser gyro inertial navigation system. The accuracy of the system in a complex electromagnetic environment

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  • Mangneto null bias testing and system-level compensating method of laser gyro inertial navigation system

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Embodiment Construction

[0037] A system-level compensation method for magnetically induced zero bias of a laser gyro inertial navigation system according to the present invention will be described in detail below in conjunction with the accompanying drawings.

[0038] The laser gyro inertial navigation system used in the test is a self-developed 90-type two-frequency machine-shaking laser gyro inertial navigation system. The laser gyro inertial navigation system zero-bias acquisition system directly collects the original pulse output by the inertial device, the measurement of the system's magnetic zero-bias and the system-level compensation method, including the following steps:

[0039] S1 measures the magnetically induced zero bias of the 90-type two-frequency machine-dithered laser gyro inertial navigation system. The test equipment used includes: 90-type two-frequency machine-jittered laser gyro inertial navigation system 100, three-dimensional Helmholtz coil 200, and laser gyro inertial navigation ...

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Abstract

The invention relates to a mangneto null bias testing and system-level compensating method of a laser gyro inertial navigation system, and belongs to the field of inertial navigation, guidance and control. The method comprises the following steps: S1, measuring a mangneto null bias of a laser gyro inertial navigation system, and S2, performing system-level compensation on the mangneto null bias of the laser gyro inertial navigation system. The method provided by the invention can comprehensively measure the mangneto null bias of the laser gyro inertial navigation system, thereby completely assessing characteristics of the mangneto null bias of the laser gyro inertial navigation system. Moreover, for the laser gyro inertial navigation system applied to a complex electromagnetic environment, the method provided by the invention can effectively compensate the mangneto null bias thereof and increase accuracy of the laser gyro inertial navigation system.

Description

technical field [0001] The invention relates to a magnetically induced zero bias test and a system-level compensation method of a laser gyro inertial navigation system, which belongs to the field of inertial navigation, guidance and control. Background technique [0002] The laser gyro inertial navigation system is a completely autonomous navigation system that can achieve all-weather, concealed, continuous space positioning and orientation around the world. It has strong anti-interference ability, good confidentiality and good short-term stability. These unique advantages The laser gyro inertial navigation system has become the main navigation system in the fields of land, sea, air and space. Among the errors of the laser gyro inertial navigation system, the zero offset error of the inertial device is a comprehensive error related to factors such as machining, material properties, temperature and magnetic field. For inertial devices that have been processed, their zero bia...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
Inventor 王琦李耿龙兴武高春峰张鹏飞谢元平魏国于旭东
Owner NAT UNIV OF DEFENSE TECH
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