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Atomic clock, micro-inertia measurement combination and navigation system coupling method and system

A micro-inertial measurement and satellite navigation system technology, applied in the field of chip-level atomic clock, micro-inertial measurement combination and satellite navigation system coupling method and system, can solve the problems of reducing the accuracy of the navigation system, poor usability, etc., to improve the usability and Accuracy, the effect of improving accuracy

Active Publication Date: 2016-05-04
TSINGHUA UNIV
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Problems solved by technology

However, for the integrated navigation to function, the number of visible satellites must not be less than three. If the number of visible satellites is lower than three, the integrated navigation degenerates into inertial navigation, that is, GNSS information is unavailable. Satellites are visible, so this leads to poor usability of this integrated navigation, which reduces the accuracy of the navigation system

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  • Atomic clock, micro-inertia measurement combination and navigation system coupling method and system
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  • Atomic clock, micro-inertia measurement combination and navigation system coupling method and system

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Embodiment Construction

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0034] The coupling method and system of a chip-level atomic clock, a micro-inertial measurement combination and a satellite navigation system according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0035] figure 1 It is a coupling method of a chip-level atomic clock, a micro-inertial measurement combination and a satellite navigation system according to an embodiment of the present invention.

[0036] Such as figure 1 As shown, the coupling method of this chip-...

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Abstract

The invention discloses a chip-level atomic clock, micro-inertia measurement combination and satellite navigation system coupling method and system. The method comprises the steps: carrying out the initial temporal and space alignment of a chip-level atomic clock, a micro-inertia measurement combination and a satellite navigation system; starting the navigation cycle, respectively obtaining the data sequences of the chip-level atomic clock, the micro-inertia measurement combination and the satellite navigation system, and carrying out the time synchronization of the data sequences of the micro-inertia measurement combination and the satellite navigation system; taking a precise clock provided by the chip-level atomic clock as the assistance when the number of currently obtained satellites is judged to be greater than zero, constructing a coupling state equation and a coupling measurement equation, carrying out the combined filtering of the coupling state equation and the coupling measurement equation, and correcting the error of the micro-inertia measurement combination. The method can improve the usability of the information of the satellite navigation system, and further improves the precision of the navigation system.

Description

technical field [0001] The invention relates to the technical field of navigation, in particular to a coupling method and system of a chip-level atomic clock, a micro-inertial measurement combination and a satellite navigation system. Background technique [0002] Navigation technology is a strategic key technology for military and civilian use. Commonly used navigation technologies are radio-based global satellite navigation system and inertial navigation technology based on Newton's classical mechanics. [0003] GNSS (Global Navigation Satellite System, Global Satellite Navigation System) is the most widely used navigation and positioning technology. Many countries have established GNSS systems, including GPS (Global Positioning System, Global Positioning System) in the United States, GLONASS (Global Navigation Satellite System, Glonass) in Russia, EU's Galileo (Galileo) and China's Beidou-2. However, GNSS is vulnerable to occlusion, interference and low data refresh rat...

Claims

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Application Information

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IPC IPC(8): G01S19/47
CPCG01S19/47
Inventor 尤政马林刘天一师帅曹浪
Owner TSINGHUA UNIV
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