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Inertial navigation system with gravity disturbance autonomous compensation function and method thereof

An inertial navigation system and gravity disturbance technology, applied in the field of inertial navigation, can solve the problems of data information transmission delay, space inconsistency, poor reliability, etc., and achieve the effect of improving accuracy, reducing measurement error, and improving reliability

Active Publication Date: 2019-03-15
TIANJIN NAVIGATION INSTR RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inertial navigation system and the gravity information measurement system are separated, and there are problems such as complex system, poor reliability, high cost, and delay in data transmission
And because the two spaces are inconsistent, there is a certain measurement error

Method used

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  • Inertial navigation system with gravity disturbance autonomous compensation function and method thereof
  • Inertial navigation system with gravity disturbance autonomous compensation function and method thereof
  • Inertial navigation system with gravity disturbance autonomous compensation function and method thereof

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Embodiment Construction

[0051] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0052] An inertial navigation system with the function of self-compensation for gravity disturbance, such as figure 1 As shown, it includes a platform-type inertial navigation system, an inertial information measurement module 1 and a gravity gradient measurement module 2; the platform-type inertial navigation system includes a three-axis platform frame 3 that isolates carrier motion, and a platform body that is stable under the geographic coordinate system 4 and a platform base 5; the inertial information measurement module 1 includes an inertial measurement unit 1-1 and a gravity measurement module 1-2;

[0053] A platform frame is installed on the platform base, and a platform body is installed on the platform frame; an inertial measurement unit, a gravity measurement module, and a gravity gradient measurement module are fixedly installed on th...

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Abstract

The invention relates to an inertial navigation system with a gravity disturbance autonomous compensation function and a method thereof. The inertial navigation system is technically characterized bycomprising a gimbaled inertial navigation system, an inertial information measurement module and a gravity gradient measurement module; the gimbaled inertial navigation system comprises a tri-axial platform frame, a platform body and a platform base; the inertial information measurement module comprises an inertial measurement unit and a gravity measurement module; the inertial measurement unit outputs line motion information and angular motion information for navigation solution; the tri-axial platform frame stabilizes the platform body under a geographic coordinate and simultaneously outputscarrier position, speed, heading and attitude navigation information; and the gravity measurement module and the gravity gradient measurement module synchronously measure gravity anomaly informationof a current position of a carrier and full tensor gravity gradient information and calculate gravity vector information of the current position of the carrier, and the gravity vector information is used for the navigation solution of the inertial measurement unit. The precision of the inertial navigation system can be improved.

Description

technical field [0001] The invention belongs to the technical field of inertial navigation, and relates to an inertial navigation system, in particular to an inertial navigation system and method with the function of self-compensation for gravity disturbance. Background technique [0002] Inertial navigation is a navigation method based on Newton's inertial principle, using gyroscopes to establish a navigation coordinate system, using accelerometers to measure the acceleration of the carrier, and obtaining the velocity of the carrier after one integration, and then obtaining the geographic location of the carrier after another integration. The basic principle of the traditional fixed orientation semi-analytic inertial navigation system is as follows: image 3 As shown, a three-axis stable platform is formed by three single-degree-of-freedom gyroscopes and a frame system, and the angular motion information sensitive to the gyroscopes is used to apply instructions to drive the ...

Claims

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Application Information

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IPC IPC(8): G01C21/16
CPCG01C21/16
Inventor 李中李达王伟高巍
Owner TIANJIN NAVIGATION INSTR RES INST
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