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

A Fault-tolerant Navigation Method Based on Augmented Pseudo-Range Information Aid

A navigation method and pseudo-range technology, applied in the field of integrated navigation, can solve the problems of filter divergence, low navigation accuracy, and Kalman filter convergence deterioration, so as to improve the accuracy of navigation and positioning, reduce navigation errors, and improve real-time performance. Effect

Active Publication Date: 2022-07-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the satellite signal is lost and cannot obtain enough navigation information or the satellite fails and cannot provide enough navigation information after troubleshooting, the satellite / SINS integrated navigation system can only work in the pure inertial navigation mode at this time, and the navigation accuracy is not high
At the same time, inaccurate system mathematical models and noise statistics, sudden noise changes, etc. will also lead to poor convergence of the Kalman filter, and even filter divergence, greatly affecting the navigation accuracy of the combined 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
  • A Fault-tolerant Navigation Method Based on Augmented Pseudo-Range Information Aid
  • A Fault-tolerant Navigation Method Based on Augmented Pseudo-Range Information Aid
  • A Fault-tolerant Navigation Method Based on Augmented Pseudo-Range Information Aid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] The present invention will be further described below with reference to the examples in the accompanying drawings. It should be understood that the embodiments described in the accompanying drawings are exemplary and are only used to explain the present invention, but not to limit the scope of the present invention.

[0048] The present invention provides a fault-tolerant navigation method based on augmented pseudo-range information. When satellites fail or enough navigation satellites cannot be obtained under special circumstances, Roland C navigation is used to provide augmented pseudo-ranges combined with satellite navigation signals for satellite fault detection. , exclusion, and combined filtering with inertial navigation to improve the fault tolerance and positioning accuracy of the navigation system. The algorithm system diagram is as follows figure 1 The simulation results are shown in Fig. Figure 2 to Figure 10 As shown, the filtering method includes the follo...

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 fault-tolerant navigation method based on augmented pseudo-range information assistance, and belongs to the technical field of combined navigation. The navigation method includes: the establishment of the state equation of the navigation system, the establishment of the measurement equation of the navigation system, and the information fusion of the integrated navigation system based on Kalman filtering. The present invention uses the ephemeris data received by the satellite receiver, the pseudolite data received by the Roland C receiver, combined with the position and velocity given by the inertial navigation system, to perform Kalman filtering, and at the same time, the multi-solution separation algorithm under the Kalman filtering starts. work to detect satellite failure conditions. If a fault is found, the fault is isolated in time, and the Kalman filter is reset by using the isolated data, and the system enters the Kalman filtering and monitoring working state again. The invention applies the multi-solution separation algorithm to the Kalman filter, which increases the continuity, stability and robustness of the Kalman filter positioning.

Description

technical field [0001] The invention relates to a fault-tolerant navigation method based on augmented pseudorange information assistance, and belongs to the technical field of combined navigation. Background technique [0002] With the rapid development of science and technology, the application of navigation systems in many fields, especially in aviation, aerospace and other fields, continues to deepen, and integrated navigation technology has become an inevitable choice. The global satellite navigation system can carry out global, all-weather and real-time navigation, and has high positioning and speed measurement accuracy. Because global satellite navigation system and SINS (strapdown inertial navigation system) have strong complementarity, the use of satellite / SINS integrated navigation system can synthesize the advantages of the two, realize the complementary advantages, and make the system adapt to the complex and changeable environment. However, when the satellite si...

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): G01S19/49G01C21/16G01S19/20G01C25/00
CPCG01S19/49G01C21/165G01S19/20G01C25/00
Inventor 李传意王融刘建业熊智李荣冰杜君南陈欣马航帅王丹
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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