Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method of continuous navigation in case of satellite signal blockage

A technology of satellite signal and navigation method, applied in satellite radio beacon positioning system, navigation, surveying and navigation and other directions, can solve the problem of not being long, unable to locate the duration of positioning, etc., and achieve the effect of reducing the deterioration of positioning accuracy

Active Publication Date: 2016-01-13
SPACE STAR TECH CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem of the present invention is to overcome the shortcomings of the prior art positioning solution algorithm that less than 4 stars cannot be positioned or the positioning duration is not long, and provide a continuous navigation method in the case of satellite signal blockage. In the case of high-dynamic and low-dynamic users, different continuous navigation solutions are proposed

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
  • A method of continuous navigation in case of satellite signal blockage
  • A method of continuous navigation in case of satellite signal blockage
  • A method of continuous navigation in case of satellite signal blockage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0155] A continuous navigation method in the case of satellite signal blockage, where the satellite signal blockage means that the number of visible satellites will be less than 4, such as figure 1 As shown, the implementation steps are as follows:

[0156] (1) Establish the navigation solution state equation, select the position, velocity and acceleration of the user's three-axis direction as the state quantity and establish the user motion model, and combine the user motion model and the clock model together and discretize it as the state equation; the details are as follows

[0157] ①Carrier motion model

[0158] Using the Singer model as the carrier motion model, assuming the sampling period is T, the discretized carrier motion model is:

[0159] x u (k)=Φ u (k,k-1)X u (k-1)+W u (k-1) (Equation 1)

[0160] In the formula

[0161] Φ u ( k , k - 1 ...

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 continuous navigation method implemented under a satellite signal blocking condition. Satellite signal blocking refers to the fact that the quantity of visible satellites is lower than 4. The continuous navigation method includes a step of (1), creating a navigation calculation state equation, in other words, selecting positions, speeds and accelerations of users in three axial directions as state parameters, creating user movement models, combining the user movement models with clock modules to obtained combinations, and discretizing the combinations to obtain the state equations. The continuous navigation method has the advantage that different continuous navigation solutions can be respectively provided for the high-dynamic and low-dynamic users under the condition that the quantity of the satellites is lower than 4.

Description

technical field [0001] The invention proposes a continuous navigation method in the case of satellite signal blockage, which is mainly applied to continuous positioning in the case of satellite signal blockage. Background technique [0002] Among the satellite navigation and positioning algorithms, the most common algorithm is the least squares or weighted least squares method. These two algorithms cannot be positioned in the case of signal blockage, and the positioning results are usually rough and messy in the case of non-blocking. When satellite navigation equipment is used in civil aviation, drones and missiles, these unfixed and jumping points may have unpredictable effects on users. In the existing satellite navigation and positioning algorithms, the LS and WLS methods can seek an optimal point among the observations containing errors and noises, so that the residual sum of squares of the observations is the smallest, but due to the measurement errors and noise solutio...

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): G01S19/49
CPCG01C21/165G01S19/49
Inventor 刘欢魏玉峤褚鹏飞侯春青
Owner SPACE STAR TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com