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Test method for dynamic property of optical fiber gyroscope

A fiber optic gyroscope and dynamic performance technology, which is applied in Sagnac effect gyroscopes, measuring devices, instruments, etc., can solve the problems of lack of testing and calibration methods for the dynamic performance of fiber optic gyroscopes, and achieve effective dynamic performance testing and reliable conclusions. , the effect of the simple method

Inactive Publication Date: 2009-06-24
HARBIN ENG UNIV
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Problems solved by technology

[0004] According to the relevant literature published at home and abroad, there is currently a lack of an ideal testing and calibration method for the dynamic performance of fiber optic gyroscopes.

Method used

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  • Test method for dynamic property of optical fiber gyroscope
  • Test method for dynamic property of optical fiber gyroscope
  • Test method for dynamic property of optical fiber gyroscope

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Experimental program
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Embodiment Construction

[0048] The present invention will be described in more detail below in conjunction with the accompanying drawings:

[0049] (1) Establishment of the mathematical model of the output signal of the fiber optic gyroscope

[0050] The fiber optic gyroscope can sense the rotation speed in the same direction as its sensitive axis. When the direction of the carrier coincides with the sensitive axis of the gyroscope, the angular velocity ω is set in advance. zaiti When turning, set R f Represents the output signal of the fiber optic gyroscope, then there is ω f =R f / K (1)

[0051] where K is the scaling factor, ω f Indicates the rotational speed detected by the gyro.

[0052] ω f =ω zaiti +ω e +B 0 +W(t) (2)

[0053] Among them, ω e represents the component of the angular velocity of the Earth's rotation on the sensitive axis of the gyro, B 0 represents the zero bias of the gyro, W(t) represents the noise, let ω 0 =ω e +B 0 , formula (2) can be written as

[0054] ω ...

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Abstract

The invention provides a method for testing the dynamic performance of an optical fiber gyro, which comprises the following steps: (1) carrying out dynamic performance test for the optical fiber gyro by using the frequency method, and recording the output signal of the gyro; (2) evaluating a discrete gyro theoretic output value according to an actual sampling time interval dt acquired periodically; and (3) analyzing the test result. The method, as a breakthrough research in the aspect of the dynamic performance of the optical fiber gyro, can visually reflect the dynamic performance of the optical fiber gyro, and analyze the dynamic performance of the optical fiber gyro in an all-around manner (under different frequencies and amplitudes) with reliable conclusions. The method is suitable for comparing the dynamic performances of a plurality of optical fiber gyros, so that proper optical fiber gyros can be selected according to specific working conditions.

Description

(1) Technical field [0001] The invention relates to a test method, in particular to a test method for the dynamic performance of an optical fiber gyro, which belongs to the technical field of optical fiber sensing. (2) Background technology [0002] Fiber optic gyroscope (FOG) is a new type of all-solid-state gyroscope developed based on the Sagnac effect. It is used to detect the angular rate of movement of the carrier. It is an inertial measurement element without mechanical rotating parts. Because of its reliability Good, long life, anti-shock, anti-vibration, high dynamic range, large bandwidth, instant start and low power consumption, etc., is considered to be an ideal inertial device widely used in aircraft, ships, missiles and other navigation and guidance systems middle. [0003] The wide use of fiber optic gyroscopes places high demands on its dynamic performance. When the fiber optic gyroscope is installed on a carrier such as a ship, missile or aircraft, when th...

Claims

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Application Information

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IPC IPC(8): G01C19/64G01C25/00
Inventor 李绪友余慧张娜于强陈世同王珺王刚周广涛王爽
Owner HARBIN ENG UNIV
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