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Course error compensation method for platform compass on ship

A heading error and compensation method technology, applied in the field of navigation, can solve the problems of horizontal attitude error, heading error adjustment results outweigh the benefits, cumbersome operation, etc., and achieve the effect of wide application conditions and accurate compensation

Active Publication Date: 2014-04-09
CSSC MARINE TECH CO LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

This will inevitably lead to problems such as cumbersome operation, low efficiency, lack of flexibility, and high requirements for test guarantee conditions.
[0004] In addition, the existing heading error compensation method is likely to introduce horizontal attitude error during the adjustment process of the main instrument installation position, so that the result of heading error adjustment is not worth the gain.
Another important problem is that in the case of emergency support, the existing methods of heading error compensation and azimuth cannot be effectively implemented at all or difficult

Method used

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  • Course error compensation method for platform compass on ship

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Embodiment Construction

[0020] Below we combine the accompanying drawings and specific embodiments to further elaborate on the compensation method for the compass course error of the platform on the ship of the present invention, in order to understand the design ideas and implementation process of the patent of the present invention more clearly, but cannot use This limits the protection scope of the present invention.

[0021] The present invention is a compensating method for the compass course error of the platform on the ship under the condition of external course reference information. The north gyroscope and the east gyroscope installed orthogonally are arranged on the inertial platform of the ship. The error compensation The method includes the following steps:

[0022] The first step is to warm up the inertial devices on the platform compass including the north gyroscope and east gyroscope for half an hour, so that the motors in the gyroscopes are in a fully floating state, and then start th...

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Abstract

The invention relates to a course error compensation method for a platform compass on a ship under a circumstance that external course standard information exists. An error compensation program can be started if a course error |delta k| is more than 0.15 degree and external course standard information exists after the platform compass stably works for 2 hours as normal, so as to control the |delta k| within 0.15 degree through rapid correction; temporary increment current is continuously applied on a bearing torquer of a north gyroscope, and simultaneously increment current is continuously applied on a horizontal torquer of the north gyroscope, wherein duration of applying the increment current and the temporary current is t; the error compensation is up to a requirement when the duration t meets a formula delta T=delta k / 3 / h, and then the temporary current on the bearing torquer of the north gyroscope is canceled. The course error compensation method for the platform compass disclosed by the invention can rapidly, stably and accurately realize course error compensation in an automatic manner with change in azimuth of main shaft of the gyroscope only; the compensation process is free from influence on variation of an attitude angle, so as to avoid a horizontal attitude error.

Description

technical field [0001] The invention belongs to the field of navigation, in particular to a heading error compensation method for a platform compass in a navigation device. Background technique [0002] In the course of the ship, the platform compass mainly provides the heading information, which is an important part of the ship's instrument, and plays a vital role in the process of the ship's course. During the initial installation and later use of the platform compass, there are often heading errors due to various reasons. If the heading error exceeding the standard exists for a long time, it will directly affect the navigation accuracy of the system, thus affecting the navigation safety of the ship. [0003] In the prior art, the method of eliminating the heading error is all carried out by adjusting the main instrument, and the purpose of adjusting the main instrument is to make the bow and stern line of the base consistent with or parallel to the bow and stern line of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C17/38
CPCG01C17/38
Inventor 蔡忠仁沈旻雅徐军
Owner CSSC MARINE TECH CO LTD
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