A method for measuring and correcting dynamic characteristics of fiber optic gyroscope
A fiber optic gyroscope and dynamic characteristic technology, which is applied to measurement devices, instruments, etc., can solve the problems of fiber optic gyroscope speed feedback accuracy or poor speed stability measurement accuracy.
Active Publication Date: 2021-09-14
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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[0003] The purpose of the present invention is to solve the problem of poor velocity feedback accuracy or velocity stability measurement accuracy of the existing fiber optic gyroscope in the high frequency band, and to provide a method for measuring and correcting the dynamic characteristics of the fiber optic gyroscope
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[0043] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0044] Such as figure 1 As shown, the present invention provides a system for measuring and correcting the dynamic characteristics of a fiber optic gyroscope, which includes a rotating platform 2, a first acceleration sensor 4, a second acceleration sensor 5, a force sensor 7, a fiber optic gyroscope under test 1, an exciter 3 and Data processing unit 6. The first acceleration sensor 4 and the second acceleration sensor 5 are respectively arranged on both sides of the rotating platform 2, the fiber optic gyroscope 1 to be tested is installed in the middle of the rotating platform 2, and is coaxial with the rotating platform 2; the exciter 3 and the rotating platform 2 connection, used to drive the rotating platform 2 to rotate according to the set amplitude-frequency curve; the force sensor 7 is installed on the excite...
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The invention provides a method for measuring and correcting the dynamic characteristics of an optical fiber gyroscope, which solves the problem that the existing optical fiber gyroscope has poor velocity feedback accuracy or velocity stability measurement accuracy in the high frequency band. The method includes: Step 1, building a fiber optic gyroscope dynamic characteristic measurement and correction system; Step 2, the exciter works, so that the rotating platform rotates according to the set amplitude-frequency curve; Step 3, the data processing unit respectively collects the first acceleration sensor, the second The data of the acceleration sensor, the measured fiber optic gyroscope and the vibrator; Step 4, calculate the angular velocity of the rotating platform according to the data of the first acceleration sensor and the second acceleration sensor; Step 5, calculate the mean value of the angular velocity of the rotating platform based on the acceleration; Step 6, Calculating the average value of the angular velocity output by the fiber optic gyroscope; Step 7, calculating the scaling factor correction factor; Step 8, obtaining the fiber optic gyroscope dynamic parameter correction table; Step 9, data correction.
Description
technical field [0001] The invention relates to the field of fiber optic gyroscopes, in particular to a method for measuring and correcting dynamic characteristics of fiber optic gyroscopes. Background technique [0002] Fiber optic gyroscopes are widely used due to their simple structure, wide range of angular velocity measurement speed, high precision, large bandwidth, fast response speed, and good adaptability to all-solid-state fiber optic environments. The length of the fiber optic loop has reached the order of kilometers. Optical theodolite mostly uses fiber optic gyroscope as speed measurement feedback or speed stability measurement reference. Usually, the static parameters of the fiber optic gyroscope have been finely calibrated before leaving the factory, and less attention has been paid to its dynamic characteristics. The longer the optical fiber loop, the smaller its dynamic response bandwidth, usually less than 100Hz. With the improvement of the accuracy of the...
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IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 崔凯刘鹏魏宇高雄郝伟高昕
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI