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Inertial navigation precision compensation method based on airspace moving average grid method

A moving average and precision compensation technology, applied in measuring devices, instruments, etc., to solve problems such as affecting accuracy

Pending Publication Date: 2021-04-20
CHANGSHA UNIVERSITY
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AI Technical Summary

Problems solved by technology

The traditional airspace moving average grid technology to obtain the disturbance gravity component only utilizes the spatial position information between the point to be estimated and the observation point, resulting in a grid error caused by the disturbance gravity during the interpolation process, thus affecting the accuracy

Method used

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  • Inertial navigation precision compensation method based on airspace moving average grid method
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  • Inertial navigation precision compensation method based on airspace moving average grid method

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Embodiment Construction

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0021] refer to figure 1 , an embodiment of the present invention provides a kind of inertial navigation accuracy compensation method based on the airspace moving average grid method, comprising the following steps:

[0022] S100. Remove the low-frequency information model value of the three components of the disturbed gravity at the observation point calculated based on the global gravity field model from the observed values ​​of the three components of the disturbed gravity to obtain a residual value of the three components of the dist...

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Abstract

The invention discloses an inertial navigation precision compensation method based on an airspace moving average grid method, and the method comprises the steps: removing a low-frequency information model value, calculated based on a global gravity field model, of a disturbance gravity component of an observation point from an observation value of the disturbance gravity component, and obtaining a residual value of the disturbance gravity component of the observation point; on the basis of the residual value of the disturbance gravity component of the observation point, calculating the residual value of the disturbance gravity component of the to-be-estimated point by applying an airspace moving average grid algorithm; and combining the residual value of the disturbance gravity component of the to-be-estimated point with the low-frequency information model value of the disturbance gravity component of the to-be-estimated point calculated based on the global gravity field model to obtain a disturbance gravity component calculated value of the to-be-estimated point. The method can ensure that the low-frequency information of the disturbance gravity component is strict and correct in principle, considers the spectral characteristics of the disturbance gravity component to suppress the grid error influence in the medium-long wave band, and improves the model resolution by using the airspace moving average technology.

Description

technical field [0001] The invention relates to the technical field of disturbance gravity calculation, in particular to an inertial navigation precision compensation method based on a space-space moving average grid method. Background technique [0002] Disturbed gravity is the essential basic information for correcting the mechanical arrangement of the inertial navigation system, and is a key element for improving the navigation and positioning accuracy of the inertial navigation system. The traditional airspace moving average grid technology to obtain the disturbance gravity component only utilizes the spatial position information between the point to be estimated and the observation point, which leads to the grid error caused by the disturbance gravity during the interpolation process, thus affecting the accuracy. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
Inventor 吴鹏聂俊伟冯璐黄雅静肖学美王兴沈步凡童凯
Owner CHANGSHA UNIVERSITY
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