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A six-position system-level calibration method for fiber optic gyroscope sins

A system-level calibration, fiber-optic gyroscope technology, applied in the field of calibration, can solve the problems of low turntable accuracy, long calibration time, and complex principles.

Active Publication Date: 2021-04-06
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is based on navigation calculation, and the accuracy requirements for the turntable are very low, but the principle of this method is complicated, and generally the calibration time is long

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  • A six-position system-level calibration method for fiber optic gyroscope sins
  • A six-position system-level calibration method for fiber optic gyroscope sins
  • A six-position system-level calibration method for fiber optic gyroscope sins

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Embodiment Construction

[0123] Such as figure 1 The schematic diagram of the rotation path arrangement of the turntable shown in the present invention calculates the system speed error by designing the six-position rotation of the turntable, and estimates the error parameters of the inertial components through the Kalman filter. In order to ensure the accuracy of the final calibration result, the turntable repeats three times for six The position is rotated, and the inertial component errors obtained by three calculations are averaged as the final calibration result. The specific calibration method is as follows:

[0124] Step 1: Install the inertial components on the turntable, the initial orientation of the inertial components is east-north-sky; power on the inertial components to preheat, and set the sampling period;

[0125] Step 2: Start to collect inertial component data and establish an inertial component error model and a strapdown inertial navigation system error model;

[0126] The install...

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Abstract

The invention discloses a six-position system-level calibration method for fiber optic gyroscope SINS. By analyzing the error propagation law of the inertial component, the six-position rotation of the turntable is designed, and the system speed error and attitude error are obtained through calculation. The item error is filtered and estimated. The beneficial effects of the present invention are: based on the system level method, the zero error, scale factor error, installation error of the fiber optic gyroscope and the zero error, scale factor error and installation error of the accelerometer can be accurately calibrated; the present invention provides the most Simple position arrangement, and the reason for the calibration position arrangement is given at the same time. The calibration principle is clear and can be calibrated at one time.

Description

technical field [0001] The invention relates to the technical field of calibration, in particular to a six-position system-level calibration method for an optical fiber gyro SINS. Background technique [0002] The strapdown inertial navigation system is a navigation device that uses gyroscopes and accelerometers to measure the angular motion and linear motion of the carrier, and obtains the instantaneous attitude, velocity and position of the carrier through integral calculations. It completely relies on its own inertial components to complete navigation tasks without relying on Any external information is a completely autonomous navigation system. Strapdown inertial navigation system is widely used in the field of national defense technology due to its advantages of high autonomy, good concealment, all-weather, good stability and high short-term accuracy. The feature of the strapdown inertial navigation system is to use a mathematical platform to replace the physical platf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 徐晓苏吴梅王捍兵
Owner SOUTHEAST UNIV