SINS and DVL roll 180-degree calibration method suitable for polar region

By performing the roll 180-degree calibration of SINS and DVL in low-latitude areas, the problems of invalid DVL speed output and difficulty in calibration in polar environments are solved, and the accuracy of speed correction coefficient and installation error angle is achieved, which improves the reliability and stability of the navigation system.

CN119737974APending Publication Date: 2025-04-01HEBEI HANGUANG HEAVY IND
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Patent Information

Application Number
CN202411696369.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-25
Publication Date
2025-04-01

AI Technical Summary

Technical Problem

In polar environments, the depth base of DVL is limited, resulting in invalid velocity output in sea ice-covered areas, and there is difficulty in rolling 180 degrees of SINS and DVL.

Method used

A SINS and DVL roll 180 degree calibration method suitable for polar regions is adopted. By calibrating in low latitude areas, the integrated SINS and DVL system is rolled 180 degrees, so that the DVL roll angle is 0 degrees and the SINS roll angle is 180 degrees. Combined with the differential GPS and inertial navigation combination navigation mode, the speed correction coefficient and installation error angle are calculated to complete the calibration.

Benefits of technology

DVL calibration in low-latitude areas is realized, accurate speed correction coefficients and installation error angles are obtained, the difficulty of direct calibration in complex environments in extreme areas is avoided, the accuracy of calibration results is ensured, the difficulty and cost of calibration is reduced, and the reliability and stability of navigation systems are improved.

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Abstract

The SINS and DVL roll 180-degree calibration method suitable for the polar region provided by the invention can be used for calibration in a low-latitude region, avoids calibration far away from the polar region, and is suitable for calibration of the SINS and DVL roll 180-degree in the polar region. According to the method, the DVL can be calibrated in a low-latitude ice-layer-free environment, corresponding processing is carried out after calibration parameters are obtained, application in a polar region ice layer environment is achieved, the calibration precision of the DVL is guaranteed, the trouble of polar region calibration is omitted, and the practical value is high. Therefore, calibration can be carried out in a low-latitude region, calibration far away from a polar region is avoided, and the method has important significance in practical application of SINS and DVL combined navigation in the polar region of a strapdown inertial navigation system.
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