Check patentability & draft patents in minutes with Patsnap Eureka AI!

Integrity monitoring method suitable for satellite lacking situation of global navigation satellite system (GNSS)

A technology for integrity monitoring and lack of stars, applied in the field of satellite navigation, it can solve the problem that the RAIM algorithm cannot realize fault monitoring, and achieve the effect of improving the integrity

Inactive Publication Date: 2010-10-20
BEIHANG UNIV
View PDF3 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The method proposed by the present invention solves the problem that the traditional RAIM algorithm cannot realize fault monitoring because the number of satellites in the satellite navigation system is less than 5. 2 The inspection method implements fault monitoring through the introduction of inertial navigation information to conduct consistency inspections on the observation information of satellite navigation system satellites at multiple times

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
  • Integrity monitoring method suitable for satellite lacking situation of global navigation satellite system (GNSS)
  • Integrity monitoring method suitable for satellite lacking situation of global navigation satellite system (GNSS)
  • Integrity monitoring method suitable for satellite lacking situation of global navigation satellite system (GNSS)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Since BD-1 has only 3 satellites, the lack of satellites for integrity monitoring is an inherent problem, and it has entered the aging stage, so the issue of integrity monitoring is particularly important. Therefore, taking BD-1 as a research example to further illustrate the method provided by the present invention, there are the following specific implementation steps:

[0078] Step 1. Select the sliding window size and determine the detection threshold according to the integrity performance requirements of the satellite navigation system and the inertial navigation accuracy;

[0079] In this example, the inertial navigation accuracy is high and is damped by the barometric altimeter. The gyroscope zero bias is 0.02 degrees / hour, and the accelerometer zero bias is 100mg.

[0080] Integrity performance parameters are selected according to the Minimum Operational Performance Standards (MOPS) for GPS integrity assurance in civil aviation flight formulated by the Radio Tec...

Embodiment 2

[0095] Select the BD-1 satellite as the faulty satellite, and set the faulty deviation from 0m to 150m with a step size of 10m. The user's location is set near Beijing (116° east longitude, 40° north latitude), and a 5-hour simulation is performed to obtain the fault detection rate curve as follows: image 3 As shown, the fault recognition rate curve is shown as Figure 4 shown.

[0096] Depend on image 3 It can be seen that after a fault deviation of 40 meters, the fault detection rate is approximately 100%. Depend on Figure 4 It can be seen that when the fault amplitude is greater than 100 meters, the recognition rate is approximately 100%. That is, after the fault amplitude is greater than 100 meters, this algorithm can complete the fault monitoring very well.

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 an integrity monitoring method suitable for the satellite lacking situation of a global navigation satellite system (GNSS) and belongs to the field of satellite navigation. The method comprises the following steps of: selecting the window size of a sliding window and determining a detection threshold according to the requirement on the integrity of the GNSS and in combination with inertial navigation accuracy; and performing fault detection on the GNSS by a slip accumulation-based multi-sample chi2 detection method so as to judge failure situation and determine a faulty satellite. The problem that fault monitoring cannot be realized in the GNSS under a satellite lacking condition is solved and the integrity of the GNSS is improved. Due to the adoption of the monitoring method provided by the invention, fault deviation is less than 40 meters, fault detection rate is approximately 100 percent, fault magnitude is more than 100 meters and recognition rate is approximately 100 percent.

Description

technical field [0001] The invention belongs to the field of satellite navigation, and specifically refers to a method for autonomous integrity monitoring of an inertial navigation aided receiver when a satellite navigation system lacks satellites. Background technique [0002] Global Navigation Satellite System (GNSS, referred to as satellite navigation system) has the ability to provide high-precision three-dimensional position and velocity information on a global scale. At present, the satellite navigation system has important applications in both military and civilian fields, and has been widely used in many fields such as aviation, aerospace, navigation, vehicle navigation, missile guidance, geodesy, and field rescue. [0003] Integrity is an important factor in evaluating the performance of navigation systems, and it is the guarantee of system safety. Especially in the field of aviation, integrity is directly related to life safety. The wide application of the satelli...

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
IPC IPC(8): G01S19/23
Inventor 李锐原彬张新源黄智刚
Owner BEIHANG UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com