Radial basis function interpolation algorithm for constructing underwater gravity-aided navigation background field
A technology of auxiliary navigation and interpolation algorithm, applied in the field of electronic information, can solve problems such as unsuitable for long-term autonomous navigation of underwater submersibles, increase in positioning error, etc., and achieve the effect of highlighting substantive features, improving accuracy, and improving algorithm accuracy
Inactive Publication Date: 2017-09-15
湖南中森通信科技有限公司
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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
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[0029] The present invention is a new radial basis function interpolation method for constructing the background field of underwater gravity-assisted navigation in consideration of removal and restoration technology, which includes taking ocean gravity observations as basic data, combining the global gravity field model, and adopting the method of taking removal and restoration technology into consideration The radial basis function interpolation algorithm is used to construct the marine gravity background field that meets the needs of underwater gravity-assisted navigation.
[0030] The radial basis function interpolation algorithm for constructing the background field of underwater gravity-assisted navigation includes the following steps:
[0031] Step 1. Remove the model gravity anomaly in the gravity anomaly observation value, and obtain the residual gravity anomaly at the observation point,
[0032] δΔg i =Δg i -Δg iM
[0033] In the formula, Δg i is the actual measu...
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The invention relates to a radial basis function interpolation algorithm for constructing an underwater gravity-aided navigation background field and belongs to the technical field of electronic information for constructing the underwater gravity-aided navigation background field with consideration of remove-restore technology. The algorithm, through combination of a global gravity field model with marine gravity observed values as basic data, constructs a marine gravity background field that satisfies demands in underwater gravity-aided navigation by means of the radial basis function interpolation algorithm with consideration of the remove-restore technology. The algorithm can eliminate influence due to edge effect, increases precision by 8 times, greatly improves accuracy, and has outstanding substantive features and significant advantages.
Description
technical field [0001] The invention relates to a radial basis function 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 chara...
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Login to View More IPC IPC(8): G01C21/20
CPCG01C21/203
Inventor 张建
Owner 湖南中森通信科技有限公司