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Method and device for correcting inertial navigation equipment

A technology of inertial navigation equipment and correction method, which is applied in the field of correction method and device of inertial navigation equipment, can solve the problem of low navigation accuracy and achieve the effect of improving work accuracy

Active Publication Date: 2019-07-23
THE PLA NAVY SUBMARINE INST
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the technical defect that there is no solution for accurate correction of inertial navigation equipment in the prior art, which leads to low navigation accuracy of inertial navigation equipment when it works underwater for a long time, thereby providing a method that can correct inertial navigation equipment. Accurate correction, correction method and device for inertial navigation equipment improving its navigation accuracy when working underwater for a long time

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  • Method and device for correcting inertial navigation equipment
  • Method and device for correcting inertial navigation equipment
  • Method and device for correcting inertial navigation equipment

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[0053] According to the following detailed description of specific embodiments of the application in conjunction with the accompanying drawings, those skilled in the art will be more aware of the above and other objectives, advantages and features of the application.

[0054] As we all know, underwater navigation and positioning mainly rely on inertial navigation equipment (referred to as "inertial navigation"), but the inertial navigation positioning error accumulates with time, and the inertial navigation needs to be corrected regularly or irregularly, that is, during the long-term work of the inertial navigation, It is necessary to measure and compensate the main error factors that cause inertial positioning errors on a regular or irregular basis, and to readjust the inertial navigation parameters. However, in order to maintain the concealment of the underwater vehicle (that is, the underwater vehicle), it is difficult for the underwater vehicle to obtain accurate correction...

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Abstract

The invention discloses a method and device for correcting inertial navigation equipment. The method comprises the steps that the inertial navigation equipment is controlled to operate in a horizontaldamping state during correction of the inertial navigation equipment to suppress a Schuler cycle oscillation error component modulated by a Foucault cycle in longitude errors of the inertial navigation equipment, then a cumulative longitude error between two different moments is obtained, an estimated value of equivalent gyro drift of the inertial navigation equipment is obtained based on the cumulative longitude error between the two different moments, an earth cycle oscillation error component and a constant error component in the inertial navigation longitude errors are eliminated, and finally the longitude errors of the inertial navigation equipment are compensated based on the estimated value of the equivalent gyro drift. According to the method and device for correcting the inertialnavigation equipment, an error source which causes the inertial navigation cumulative longitude error components is estimated, the compensation for the inertial navigation cumulative longitude errorsis realized, and the underwater long-time navigation accuracy of the inertial navigation equipment is improved.

Description

technical field [0001] The present application relates to the technical field of underwater navigation of underwater vehicles, in particular to a calibration method and device for inertial navigation equipment. Background technique [0002] With the advancement of technology, the time for underwater vehicles to sail continuously underwater is getting longer and longer, and the requirements for navigation and positioning accuracy are getting higher and higher. However, due to environmental conditions, underwater correction methods are very limited. At present, underwater navigation and positioning mainly rely on inertial navigation equipment (hereinafter referred to as "inertial navigation"). Inertial navigation is the core navigation equipment to ensure the concealed navigation of underwater vehicles. However, inertial navigation and positioning errors accumulate over time. Underwater vehicles It is necessary to surface regularly or irregularly to obtain correct position inf...

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Application Information

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IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 王超郭正东蔡鹏丁文强王光辉高大远栾禄雨姜暖高胜峰
Owner THE PLA NAVY SUBMARINE INST
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