Inverse distance weighted interpolation algorithm for constructing underwater gravity assisted navigation background field

An inverse distance weighted, assisted navigation technology, applied in the field of electronic information, can solve the problems of unsuitable underwater submersibles for long-term autonomous navigation and increase of positioning errors, and achieve the characteristics of highlighting substantive characteristics, improving accuracy, and improving algorithm accuracy. Effect

Inactive Publication Date: 2017-08-18
湖南中森通信科技有限公司
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Problems solved by technology

The most widely used method in underwater navigation technology is inertial navigation. This method has the advantages of high precision and good reliability. However, when performing trajectory calculat...

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  • Inverse distance weighted interpolation algorithm for constructing underwater gravity assisted navigation background field
  • Inverse distance weighted interpolation algorithm for constructing underwater gravity assisted navigation background field
  • Inverse distance weighted interpolation algorithm for constructing underwater gravity assisted navigation background field

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Embodiment Construction

[0028] The present invention is a new inverse distance weighted interpolation method for constructing the background field of underwater gravity-assisted navigation in consideration of removal and recovery technology, which includes taking the ocean gravity observation value as basic data, combining with the global gravity field model, and adopting the inverse distance weighted interpolation method in consideration of removal and recovery technology. The distance-weighted interpolation algorithm constructs the ocean gravity background field that meets the needs of underwater gravity-assisted navigation.

[0029] The inverse distance weighted interpolation algorithm for constructing the underwater gravity-assisted navigation background field includes the following steps:

[0030] Step 1. Remove the model gravity anomaly in the gravity anomaly observation value, and obtain the residual gravity anomaly at the observation point,

[0031] δΔg i =Δg i -Δg iM

[0032] In the form...

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Abstract

The invention relates to a reverse distance weighted interpolation algorithm for constructing an underwater gravity assisted navigation background field, and belongs to the technical field of underwater gravity assisted navigation background field electronic information constructing taking account of the remove-restore technique. The ocean gravity observation value is used as basic data, combined with a global gravity field model, and the inverse distance weighted interpolation algorithm taking account of the remove-restore technique is used, to build an ocean gravity background field which meets the underwater gravity navigation needs. The reverse distance weighted interpolation algorithm has the following technical advantages of eliminating the influence of the edge effect, and improving the algorithm accuracy by sixteen times.

Description

technical field [0001] The invention relates to an inverse distance weighted interpolation algorithm for constructing the background field of underwater gravity-assisted navigation, and belongs to the electronic information technology field of constructing the background field of underwater gravity-assisted navigation in consideration of removal and restoration technology. Background technique [0002] With the advancement of the national deep sea strategy, underwater navigation technology has received more and more attention. The most widely used method in underwater navigation technology is inertial navigation. This method has the advantages of high precision and good reliability. However, when performing trajectory calculation and positioning calculation, system errors accumulate over time. , the positioning error will increase without limit, and it is not suitable for underwater submersibles to sail autonomously for a long time. Gravity belongs to the inherent physical ...

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Application Information

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IPC IPC(8): G01C21/20
CPCG01C21/203
Inventor 张建
Owner 湖南中森通信科技有限公司
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