Calibrating method of fiber-optic gyroscope SINS six-position system level

A system-level calibration and fiber optic gyroscope technology, applied in the field of calibration, can solve problems such as complex principles, low precision of turntables, and long calibration time

Active Publication Date: 2018-02-02
SOUTHEAST UNIV
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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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  • Calibrating method of fiber-optic gyroscope SINS six-position system level
  • Calibrating method of fiber-optic gyroscope SINS six-position system level
  • Calibrating method of fiber-optic gyroscope SINS six-position system level

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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 calibrating method of a fiber-optic gyroscope SINS six-position system level. The calibrating method includes steps of analyzing a bias transmission rule of an inertia component, designing the six-position rotation of a rotating table; calculating to obtain the system speed bias and gesture bias; performing filtering estimation on every bias through a Kalman filtering device. The calibrating method has the beneficial effects that the calibrating method can exactly calibrate the zero error, scale factor error, and installation error of the fiber-optic gyroscope, and the zero error, the scale factor error and the installation error of an accelerometer on the basis of the system level method; the method provides the simplest position arrangement while presents the reason of organizing the calibrating position; the calibrating principle is clear, and the one-time calibration can be achieved.

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 Applications(China)
IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 徐晓苏吴梅王捍兵
Owner SOUTHEAST UNIV
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