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Method for measuring swaying and surging information of ship based on optical fiber gyroscope inertial measurement system

A fiber optic gyroscope and inertial measurement technology, applied in the field of information measurement, can solve the problems of inability to accurately separate the amount of high-frequency displacement information of sway, surge and heave, and the inability to provide high-frequency displacement information

Inactive Publication Date: 2010-08-04
HARBIN ENG UNIV
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Problems solved by technology

With the rapid development of the inertial measurement system, its measurement of the three ship attitude information (roll, pitch, yaw) has achieved high accuracy, but the high-frequency displacement information on the three degrees of freedom has been can not provide
This is because the traditional speed measurement technology used by the inertial measurement system can only measure the total displacement information of the ship (the total displacement information contains 84.4 minutes of Shura period error), and cannot accurately separate the sway, surge and heave high frequency displacement information

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  • Method for measuring swaying and surging information of ship based on optical fiber gyroscope inertial measurement system
  • Method for measuring swaying and surging information of ship based on optical fiber gyroscope inertial measurement system
  • Method for measuring swaying and surging information of ship based on optical fiber gyroscope inertial measurement system

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Embodiment Construction

[0056] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0057] The marine optical fiber strapdown inertial measurement system is installed at the center of the ship. The specific implementation steps of measuring ship sway and surge motion are as follows:

[0058] Step 1. Fully preheat the marine FOG strapdown inertial system. The preheating time is set according to the specific system, and the output signals of the FOG and accelerometer on the three axes are collected in real time.

[0059] Step 2. Using the output of the gyroscope and accelerometer, and using the existing strapdown inertial attitude measurement technology, the real-time attitude information of the ship (including pitch angle α, roll angle β, and yaw angle γ) is obtained, and then the attitude The information constitutes the relationship matrix between the carrier coordinate system b and the geographic coordinate system t

[0060]

[0061] in

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Abstract

The invention provides a method for measuring swaying and surging information of a ship based on an optical fiber gyroscope inertial measurement system. An optical fiber strap down inertial measurement system for the ship is installed at a central position of the ship to measure the swaying and surging movements of the ship. Total displacement information is processed by using the traditional inertial measurement system and a digital filtering technology and the information of the swaying and surging translational movements is provided. The technology of the invention has the following advantages of: providing the swaying and surging information of the ship in real time combined with the digital filtering technology by using outputs of the gyroscope and an accelerometer on the optical fiber gyroscope inertial measurement system mounted on the traditional ship without increasing a new sensor under the condition of no external reference information, increasing the function of the original inertial measurement system and synchronously enhancing the measurement precision of navigation parameters of the system.

Description

technical field [0001] The invention relates to an information measurement method, in particular to a method for measuring the sway and surge motion of a ship based on a fiber optic gyro strapdown inertial measurement system under complex sea conditions. Background technique [0002] The inertial measurement system used in ships consists of gyroscopes, accelerometers, and navigation computers, which can provide information about the ship's attitude, velocity, and displacement. The displacement of the ship can be decomposed into the low-frequency component introduced by the maneuvering of the ship in the frequency domain (the maneuvering of the ship is relatively gentle), and the high-frequency component caused by the surge with three degrees of freedom. In the traditional inertial navigation measurement technology, the inertial measurement system is more accurate in the measurement of the high-frequency components in the displacement information measurement, but the measurem...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/16B63B9/08
Inventor 奔粤阳李倩高伟孙枫于飞
Owner HARBIN ENG UNIV
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