Inertial navigation precision compensation method considering frequency domain characteristics based on radial basis function

A technology of precision compensation and frequency domain characteristics, applied in the field of disturbed gravity calculation, can solve problems such as affecting accuracy, achieve the effect of ensuring correctness, suppressing the influence of grid errors, and improving model resolution

Pending Publication Date: 2021-04-20
CHANGSHA UNIVERSITY
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Problems solved by technology

The traditional spatial radial basis function grid technology for obtaining the disturbance gravity component only uses 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

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  • Inertial navigation precision compensation method considering frequency domain characteristics based on radial basis function
  • Inertial navigation precision compensation method considering frequency domain characteristics based on radial basis function
  • Inertial navigation precision compensation method considering frequency domain characteristics based on radial basis function

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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 radial basis function-based inertial navigation accuracy compensation method in consideration of frequency domain characteristics, 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 thr...

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Abstract

The invention discloses an inertial navigation precision compensation technology compensation method considering frequency domain characteristics based on a radial basis function; the method comprises the following steps: removing a low-frequency information model value of a disturbance gravity component of an observation point calculated based on a global gravity field model from an observation value of the disturbance gravity component; 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 radial basis function 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 a medium-long wave band, and improves the model resolution by using the spatial domain radial basis function 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 radial basis function and considering frequency domain characteristics. 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 spatial radial basis function grid technology to obtain the disturbed gravity component only uses the spatial position information between the estimated point and the observed point, resulting in gridding errors caused by the disturbed gravity during the interpolation process, which affects 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. ...

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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陈雨莺伍艳龄靖守让
Owner CHANGSHA UNIVERSITY
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