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Method for monitoring integrity of navigation system based on distributed sensor network

A distributed sensor, integrity monitoring technology, applied in radio wave measurement systems, satellite radio beacon positioning systems, instruments, etc., can solve problems such as inability to be directly applied, and achieve enhanced integrity performance, good real-time performance, and high reliability. Effect

Inactive Publication Date: 2012-12-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0006] The present invention proposes a navigation system integrity monitoring method based on a distributed sensor network for a new type of navigation system based on a distributed inertial sensor network, which overcomes the disadvantage that the existing integrity monitoring method cannot be directly applied to a distributed navigation system, Improving the integrity of distributed navigation systems

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  • Method for monitoring integrity of navigation system based on distributed sensor network
  • Method for monitoring integrity of navigation system based on distributed sensor network
  • Method for monitoring integrity of navigation system based on distributed sensor network

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Embodiment Construction

[0025] The invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] Implementation Route of Navigation System Based on Distributed Sensor Network

[0027] Such as figure 1 As shown, taking the aircraft motion carrier as an example (other motion carriers such as ships, large spacecraft, etc. are similar), k sensor network nodes composed of SRIMU, k is a natural number, distributed in multiple The location constitutes a distributed sensor network topology, which can not only provide redundant distributed measurement information for the navigation of the carrier, but also provide a local measurement system for the electronic equipment of the carrier, such as radar tracking and equipment load, and at the same time provide Inertial state information for local motion compensation of the carrier electronics. The navigation structure based on the distributed sensor network can improve the level of fault tolerance and dynamically c...

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Abstract

The invention discloses a method for monitoring the integrity of a navigation system based on a distributed sensor network and belongs to the technical field of navigation positioning. According to the method disclosed by the invention, the integrity of the navigation system based on the distributed sensor network is monitored by utilizing a staged treatment mode of sensor-stage integrity monitoring treatment and system-stage integrity monitoring treatment. During the sensor-stage integrity monitoring stage, the integrity of a GNSS (Global Navigation Satellite System) receiver is monitored by utilizing an RAIM (Receiver Automatic Integrity Monitoring) method, the integrity of k SRIMU network nodes is monitored by utilizing a comprehensive method based on a moving window-parity vector method and a discrete wavelet transform method; and during the system-stage integrity monitoring stage, the integrity is monitored by adopting an innovation-based processing method and a moving window information processing method. According to the method disclosed by the invention, in terms of a distributed sensor network node to a whole distributed navigation system, both phase step fault and slope fault can be effectively monitored, and the integrity performance of the navigation system based on the distributed sensor network can be comprehensively enhanced.

Description

technical field [0001] The invention relates to a navigation system integrity monitoring method based on a distributed sensor network, and belongs to the technical field of navigation system integrity monitoring. Background technique [0002] Integrity refers to the ability of the navigation system to provide timely and effective warning information when the error caused by failure or performance deterioration exceeds the acceptable limit value (warning threshold) during the use of the navigation system. In order to ensure the reliability of the navigation system, the integrity monitoring of the navigation system is required, and its main purpose is to detect and isolate faults. Integrity monitoring performs processing such as detection statistics and threshold judgment through the analysis of redundant information such as hardware and software. [0003] At present, there have been many studies on the integrity monitoring of navigation systems at home and abroad, which are ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/48G01S19/23G01C25/00
Inventor 刘海颖钱颖红叶伟松华冰陈志明许蕾
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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