A heading error compensation method for a platform compass on a ship

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 method for compensating the heading error of a platform compass in a navigation device. Background technique [0002] In the course of the ship, the platform compass mainly provides heading and attitude information, which is an important part of the ship's instrument, which plays a vital role in the course of the ship. During the initial installation and later use of the platform compass, heading errors are often caused 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, thereby affecting the navigation safety of the ship. [0003] In the prior art, the method of eliminating heading errors is performed by adjusting the main instrument. The purpose of adjusting the main instrument is to make the base and the ship's fore and aft line coincide or parallel. This method is to compensate the he...

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

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