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High-precision fiber-optic gyroscope inertial measurement device calibration method

A technology of fiber optic gyroscope and calibration method, which is applied in the direction of measuring device, navigation through speed/acceleration measurement, transportation and packaging, etc., which can solve the problems of long process time and large human error

Inactive Publication Date: 2015-04-29
BEIJING AEROSPACE TIMES OPTICAL ELECTRONICS TECH
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a fast and accurate calibration method for high-precision fiber optic gyroscope inertial measurement device, which overcomes the problems of large human error and long process time in the calibration method in the prior art

Method used

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  • High-precision fiber-optic gyroscope inertial measurement device calibration method

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specific Embodiment

[0054] A specific example is as follows:

[0055] Such as figure 1 As shown, the fiber optic gyroscope inertial measurement device (inertial measurement device) calibration method includes the following steps:

[0056] (1) The X-axis, Y-axis, and Z-axis of the high-precision fiber optic gyroscope inertial measurement device are reversed 90°, 180°, and 270° in the forward direction according to the oi axis (i=X, Y, Z) respectively, and then rotated 90° in the reverse direction, 180°, 270° return to the initial position, 18 position flips, including 19 positions in total. For example, take Beitiandong, Tiannandong, Nandidong, Dibeidong, Nandidong, Tiannandong, Beitiandong, Beixitian, Tianxinnan, Nanxidi, Dixibei, Nanxidi, Tianxinnan, Beixitian , Beidixi, Beidongdi, Beidixi, Beixitian, Beitiandong, a total of 19 locations for calibration.

[0057] (2) Set the body coordinate system of the high-precision fiber optic gyro inertial measurement device as b, and establish the error...

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Abstract

The invention discloses a high-precision fiber-optic gyroscope inertial measurement device calibration method which comprises the following steps: S1, respectively forwards turning a fiber-optic gyroscope inertial measurement device by 90 degrees, 180 degrees and 270 degrees for three times according to three axes of oi shaft (i refers to X, Y and Z), reversely rotating the device by 90 degrees, 180 degrees and 270 degrees for three times, and returning to an initial position; and S2, totally moving by 19 positions comprising the previous 18 turning positions and the initial position, fully exciting the error of the instrument under static and dynamic conditions, and performing optimal estimation by utilizing a parameter estimation method. According to the method disclosed by the invention, repeated electrification and power failure are not needed, the device is only turned according to a certain sequence, the parameters can be identified, and the influence caused by inconsistent reference in the repeated electrification and calibration process is avoided.

Description

technical field [0001] The invention relates to the field of optical fiber gyroscope inertial measurement devices, in particular to a calibration method for high-precision optical fiber gyroscope inertial measurement devices. Background technique [0002] As a symbol of high-tech development, satellites play an extremely important role in my country's national defense and economic construction. The accuracy of attitude determination is the prerequisite for the satellite to obtain information stably and effectively. The satellite attitude control system is one of the important systems to ensure the accuracy of the satellite attitude, and the inertial device is an extremely critical sensor in the satellite attitude control system, which directly affects the attitude control system. accuracy and performance. [0003] The fiber optic gyroscope is an all-solid-state inertial instrument, which has advantages that traditional electromechanical instruments do not have. It is a clo...

Claims

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Application Information

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IPC IPC(8): G01C25/00
CPCG01C25/005G01C21/188B64G1/369
Inventor 张峰向政邢向明孟祥涛邢辉韩英杰郑极石刘玲
Owner BEIJING AEROSPACE TIMES OPTICAL ELECTRONICS TECH
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