Virtual Polar Region Method Based on Horizontal Geographical Coordinate System

A geographic coordinate system and horizontal technology, applied in the field of virtual polar regions based on the horizontal geographic coordinate system, can solve problems such as poor applicability, achieve the effect of improving modeling accuracy and expanding the applicable area

Active Publication Date: 2022-07-05
NORTHWESTERN POLYTECHNICAL UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of poor applicability of the existing virtual polar region method, the present invention provides a virtual polar region method based on the horizontal geographic coordinate system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Virtual Polar Region Method Based on Horizontal Geographical Coordinate System
  • Virtual Polar Region Method Based on Horizontal Geographical Coordinate System
  • Virtual Polar Region Method Based on Horizontal Geographical Coordinate System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] refer to Figure 1-3 . The specific steps of the virtual polar area method based on the horizontal geographic coordinate system of the present invention are as follows:

[0031] 1. Reconstruction of polar trajectory data.

[0032] Define b as the carrier coordinate system, the coordinate axis points to the upper right direction of the carrier; i and e systems are the traditional inertial coordinate system and the earth coordinate system; g is the geographic coordinate system, the coordinate axis points to the northeast sky direction of the local location, the coordinate system The position coordinates of the lower position use p g =[λLh] T express. define e t It is a horizontal earth coordinate system, which is orbited by the e system and ox e Rotate the shaft -90°, then around oz e Obtained after turning -90°; g t It is a horizontal geographic coordinate system, and the coordinate axes respectively point to the northeast sky direction of the horizontal pseudo-l...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a virtual polar area method based on a horizontal geographic coordinate system, which is used to solve the technical problem of poor applicability of the existing virtual polar area method. The technical solution is to keep the attitude matrix, velocity and altitude information in the lateral geographic system unchanged, and reconstruct the polar position trajectory by integrating the lateral velocity after compensating the ellipsoid correction coefficient; In the horizontal geographic coordinate system, the local earth rotation angular rate and gravity acceleration are deducted, and the earth rotation angular rate and gravity vector of the virtual polar region are superimposed to complete the polar region reconstruction of inertial sensor data. The present invention reconstructs the polar area trajectory data and inertial sensor data in the horizontal geographic coordinate system, so that the motion characteristics of the carrier relative to the local horizontal plane remain unchanged, the applicable area is enlarged, and it can be applied to any position on the earth's surface except the horizontal pole; The spherical approximation is avoided by the ellipsoid correction coefficient, and the modeling accuracy is improved.

Description

technical field [0001] The invention relates to a virtual polar area method, in particular to a virtual polar area method based on a horizontal geographic coordinate system. Background technique [0002] Due to the unique geographical location of the earth's poles, it is difficult for navigation algorithm researchers to have the opportunity to conduct practical experiments in the polar regions, and pure mathematical simulation methods are difficult to truly reflect the motion characteristics of the carrier and inertial sensor errors. Therefore, it is of great significance to study the virtual polar region technology based on real test data, which can convert the test data in the middle and low latitudes to the polar region by mathematical methods for equivalent navigation test verification. [0003] The paper "Research on the Method of Verification of Polar Region Navigation Algorithms Based on Virtual Pole, IEEE China Guidance, Navigation and Control Academic Conference, 20...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/36G06F17/16
CPCG06F17/16
Inventor 付强文李四海严恭敏刘士明朱帅魏栋
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap