Fiber-optic gyroscope dynamic characteristic measurement correction method
A technology of fiber optic gyroscope and dynamic characteristics, which is applied in the direction of measuring devices, instruments, etc., can solve the problems of poor speed feedback accuracy or speed stability measurement accuracy of fiber optic gyroscope, and achieve the improvement of speed feedback accuracy or speed stability measurement accuracy, control and The effect of high feedback sensitivity and fast response speed
Active Publication Date: 2020-06-26
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 with reference to the drawings and specific embodiments.
[0044] Such as figure 1 As shown, the present invention provides a fiber optic gyroscope dynamic characteristic measurement and correction system, which includes a rotating platform 2, a first acceleration sensor 4, a second acceleration sensor 5, a force sensor 7, a tested fiber optic gyroscope 1, a vibration 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 tested fiber optic gyroscope 1 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 Connected to drive the rotating platform 2 to rotate according to the set amplitude-frequency curve; the force sensor 7 is installed on the exciter 3 as the excitation and control feedba...
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The invention provides a method for measuring and correcting dynamic characteristics of a fiber-optic gyroscope. The method solves the problem that an existing fiber-optic gyroscope is poor in speed feedback precision or speed stability measurement precision in a high frequency band. The method comprises the following steps: 1, establishing a fiber-optic gyroscope dynamic characteristic measurement correction system; 2, a vibration exciter works, so that the rotating platform rotates according to a set amplitude-frequency curve; 3, respectively acquiring data of the first acceleration sensor,the second acceleration sensor, the tested fiber-optic gyroscope and the vibration exciter by a data processing unit; 4, calculating the angular velocity of the rotating platform according to the data of the first acceleration sensor and the second acceleration sensor; 5, calculating a mean value of the angular velocity of the rotating platform based on the acceleration; 6, calculating the mean value of the angular velocity output by the fiber-optic gyroscope; 7, calculating a scale factor correction factor; 8, acquiring a dynamic parameter correction table of the fiber-optic gyroscope; 9, correcting data.
Description
Technical field [0001] The invention relates to the field of fiber optic gyroscopes, in particular to a method for measuring and correcting the dynamic characteristics of fiber optic gyroscopes. Background technique [0002] Fiber optic gyroscopes are widely used due to their simple structure, large angular velocity measurement speed range, high accuracy, large bandwidth, fast response speed, and good adaptability to the all-solid-state environment of the fiber. The fiber loop length has reached the order of kilometers. Optoelectronic theodolites mostly use fiber optic gyroscopes as speed feedback or speed stability measurement benchmarks. Usually, the static parameters of the fiber optic gyroscope are finely calibrated when they leave the factory, and less attention is paid to its dynamic characteristics. The longer the optical fiber loop, the smaller the dynamic response bandwidth, usually less than 100Hz. With the improvement of the accuracy of fiber optic gyroscopes and 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