Online calibration method for north-seeking rotation on basis of triaxial MEMS (Micro-Electromechanical System) gyroscope

A calibration method and gyroscope technology, applied in the north-seeking field in the north-seeking system, can solve the problems of low accuracy of gyroscopes, small size, and reduced measurement accuracy of instruments, avoiding experimental data errors, simple calculation methods, and reducing effect of influence

Inactive Publication Date: 2017-05-24
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Literature [1] proposed that the conventional method of well logging is to use geomagnetic measurement technology, which is easily disturbed by the external magnetic field, and the abnormal geological conditions and even special astronomical phenomena of the magnetic field will lead to a decrease in the m

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  • Online calibration method for north-seeking rotation on basis of triaxial MEMS (Micro-Electromechanical System) gyroscope
  • Online calibration method for north-seeking rotation on basis of triaxial MEMS (Micro-Electromechanical System) gyroscope
  • Online calibration method for north-seeking rotation on basis of triaxial MEMS (Micro-Electromechanical System) gyroscope

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[0051] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.

[0052] The technical scheme that the present invention solves the above-mentioned technical problem is,

[0053] Below in conjunction with accompanying drawing, the present invention will be further described:

[0054] (1) First select an inertial system that integrates a three-axis MEMS gyroscope attitude indicator;

[0055] (2) Select the two-axis electric turntable of the rotation control system, and perform zero-return operation on the main shaft and pitch axis of the electric turntable to make the turntable level;

[0056] (3) The horizontal axis (X-axis) and vertical axis (Y-axis) of the attitude indicator are parallel to the horizontal plane of the turntable, and the vertical axis (Z-axis) is perp...

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Abstract

The invention relates to an online calibration method for north-seeking rotation on the basis of a triaxial MEMS (Micro-Electromechanical System) gyroscope. The online calibration method comprises the following steps of: on a rotary control system, carrying out 'online' rotation control on an attitude instrument integrated with the triaxial MEMS gyroscope, measuring the attitude of the attitude instrument in real time by carrying out installation error calibration, filtering processing and temperature compensation on the triaxial MEMS gyroscope, outputting a course angle when the rolling angle and pitching angle of the attitude instrument are zero, applying a transformation matrix between a carrier coordinate system and a navigation coordinate system to carry out transformation, and after consideration for the local magnetic declination, finally obtaining a north-seeking value. The online calibration method adopts the MEMS gyroscope, is low in cost, high in north-seeking speed, high in accuracy and simple in calculation principle and is applicable to underground north seeking with high requirements.

Description

technical field [0001] The invention belongs to an online calibration method for north-seeking rotation of a three-axis MEMS gyroscope, in particular to a north-seeking method in a north-seeking system. Background technique [0002] In people's production and life, the determination of the orientation is essential, and the positioning technology is constantly being developed. However, the traditional positioning technology has poor environmental adaptability and low precision, and can no longer meet the needs of rapid development of life. With the rapid development of modern science and technology, the requirements for north-seeking technology in fields such as well logging, exploration, navigation and aviation are getting higher and higher. Inertial technology is a comprehensive technology integrating classical mechanics and physics, which can control the trajectory and motion attitude. Its appearance promotes the development of the north-seeking system in the direction of ...

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Application Information

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IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 刘宇向高军路永乐邸克郭俊启周敏张旭李俊林司学迁
Owner CHONGQING UNIV OF POSTS & TELECOMM
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