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A Calibration Method of Combined Error Coefficient of Gyroscope under Uncertain Baseline

A technology of combined error and calibration method, applied in the occasion of calibrating gyroscope combination in strapdown inertial combination, gyroscope combination error coefficient calibration, error coefficient calibration field, can solve problems such as unfavorable rapid calibration, limited calibration conditions, time-consuming and labor-intensive, etc.

Active Publication Date: 2017-07-28
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the laboratory, if the position of the turntable is changed, or the turntable is transferred to the field for testing, it is necessary to use measurement and other methods to calibrate the turntable, which is time-consuming and laborious
This calibration method can only calibrate the error coefficient of the gyroscope when the accurate horizontal reference and azimuth reference are obtained, which limits the calibration conditions and is not conducive to rapid calibration under maneuvering conditions

Method used

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  • A Calibration Method of Combined Error Coefficient of Gyroscope under Uncertain Baseline
  • A Calibration Method of Combined Error Coefficient of Gyroscope under Uncertain Baseline
  • A Calibration Method of Combined Error Coefficient of Gyroscope under Uncertain Baseline

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Embodiment

[0114] The latitude L of the earth where the strapdown inertial combination is tested is 39.914°; the earth's gravitational acceleration g 0 9.801275(m / s 2 ); the earth's rotation angular velocity ω ie It is 15.04107 (rad / s); the error of the asymmetry term of the scale factor of the X-axis accelerometer obtained by taking the average value of multiple measurements It is 6.65907E-04; the error of the scale factor asymmetry item of the Y-axis accelerometer obtained by taking the average value of multiple measurements It is 2.05815E-04; the error of the scale factor asymmetry term of the Z-axis accelerometer obtained by taking the average value of multiple measurements is 1.20231E-04; the installation error angle of the X-axis relative to the Y-axis in the accelerometer combination obtained by taking the average value of multiple measurements is 2.98716E-03 (rad); the installation error angle of the X-axis relative to the Z-axis in the accelerometer combination obtained b...

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Abstract

The invention relates to an error coefficient calibration method, and in particular relates to an error coefficient calibration method for gyroscope combination under an uncertain standard condition, belonging to the technical field of strapdown inertial combination calibration. The error coefficient calibration method can be applied to the place for calibrating gyroscope combination in strapdown inertial combination. The error coefficient of the gyroscope combination can also be calibrated under the uncertain standard condition; the outer field calibration efficiency is improved; and the accuracy of the calibration system is improved. According to the method provided by the invention, test positions are multiple, and more information is contained, so that the accuracy and the reliability of the calibration result can be improved; according to the method provided by the invention, the test time consumption is short, the calculation is simple, and the calibration of the inertial combination and the gyroscope combination can be rapidly finished; the error coefficient of the gyroscope combination can be calibrated by a multi-position static test; the calibration flow is greatly simplified; a dual-axis rotating mechanism adopted during calibration can be a dual-axis precise turntable, a three-axis precise turntable or other devices capable of achieving dual-axis rotation; and the demands on test equipment are lowered.

Description

technical field [0001] The invention relates to an error coefficient calibration method, in particular to a gyroscope combination error coefficient calibration method under uncertain reference conditions, belonging to the technical field of strapdown inertial combination calibration, and can be used for calibrating gyroscope combinations in strapdown inertial combinations. Background technique [0002] The gyroscope is one of the basic measurement elements of inertial navigation and inertial guidance systems. It is installed inside the carrier to measure the angular velocity of the carrier, and the angular velocity of the carrier can be obtained by integrating the angular velocity. The performance and accuracy of the gyroscope combination directly affect the accuracy of the navigation and guidance system, and play a key role in the performance of the inertial system. The strapdown inertial combination is an inertial measurement device that integrates a gyroscope combination ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 魏宗康黄超刘璠
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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