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Method and system for reducing influence of speed error on integrated navigation precision in lock losing process

An integrated navigation and speed error technology, applied in the field of integrated navigation, can solve the problems of high real-time data requirements, high dynamic global satellite positioning system speed output error, and reduced precision of inertial navigation/global satellite positioning integrated navigation system. Mature and reliable, good real-time performance, and the effect of improving accuracy

Active Publication Date: 2014-02-19
THE GENERAL DESIGNING INST OF HUBEI SPACE TECH ACAD
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Problems solved by technology

[0003] In the process of integrated navigation of the inertial navigation / global satellite positioning integrated navigation system, when the satellite is out of lock, due to the continuous reduction of the number of satellites and the high real-time data requirements of the high dynamic global satellite positioning system, the high dynamic global The speed output of the satellite positioning system will produce a large error
For the inertial navigation / global positioning integrated navigation system, the inertial navigation / global positioning integrated navigation system cannot distinguish this kind of error, so the error of satellite loss will be directly introduced into the inertial navigation / global positioning integrated navigation system, resulting in inertial navigation / The accuracy of the global satellite positioning integrated navigation system is significantly reduced

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  • Method and system for reducing influence of speed error on integrated navigation precision in lock losing process
  • Method and system for reducing influence of speed error on integrated navigation precision in lock losing process

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0023] Such as figure 1 The system shown can reduce the influence of the loss-of-lock speed error on the integrated navigation accuracy, which includes a global satellite positioning system receiver 1, a micromechanical inertial set 4, a programmable logic controller 5, a digital signal processor 3 and a CAN bus 6, Wherein, the signal output end of the global satellite positioning system receiver 1 is connected to the signal input end of the programmable logic controller 5, and the signal output end of the micromechanical inertial group 4 is connected to the signal input end of the digital signal processor 3, and the The signal output end of the PLC 5 is connected to the signal input end of the digital signal processor 3 , and the signal output end of the digital signal processor 3 is connected to the CAN bus 6 . A Kalman filter algorithm is em...

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Abstract

The invention discloses a method and system for reducing the influence of a speed error on integrated navigation precision in a lock losing process. The system comprises a global positioning system receiver, a micromechanical inertial measurement unit, a programmable logic controller, a digital signal processor and a CAN bus, the signal output end of the global positioning system receiver is connected with the signal input end of the programmable logic controller, the signal output end of the micromechanical inertial measurement unit is connected with the signal input end of the digital signal processor, the signal output end of the programmable logic controller is connected with the signal input end of the digital signal processor, and the signal output end of the digital signal processor is connected with the CAN bus. The method and system can obviously improve the navigation precision of an inertial navigation / global positioning satellite integrated navigation system in the lock losing state of a satellite.

Description

technical field [0001] The invention relates to the technical field of integrated navigation, in particular to a method and system for improving the accuracy of integrated navigation by reducing the speed error when losing lock. Background technique [0002] The inertial navigation system is an autonomous navigation system, which has the characteristics of not relying on any external navigation equipment when working, and has good concealment and high data update rate. But the navigation error of the inertial navigation system will accumulate over time. Satellite navigation GPS (Global Positioning System, Global Satellite Positioning System) can provide high-precision three-dimensional position, speed and time reference information around the clock, and has the functions of static positioning, dynamic navigation and precise timing, but satellite navigation is susceptible to interference and short-term stability Low, the update rate is low. Aiming at the advantages and disa...

Claims

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Application Information

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IPC IPC(8): G01S19/47
CPCG01C21/165G01S19/49
Inventor 何健伟吕江涛陆俊清
Owner THE GENERAL DESIGNING INST OF HUBEI SPACE TECH ACAD
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