Closed-loop fiber optic gyro scale factor fast stabilization method and device
A scaling factor, fiber optic gyroscope technology, which is applied to measuring devices, instruments, etc., can solve the problems of large scale factor error and long startup time, and achieve the effect of realizing scale factor and reducing error.
Active Publication Date: 2018-10-23
中航捷锐(西安)光电技术有限公司
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[0005] In view of the above analysis, the present invention aims to provide a method and device for quickly stabilizing the scale factor of a closed-loop fiber optic gyroscope to solve the problems of large scale factor errors and long start-up time of the closed-loop fiber optic gyroscope in the prior art during startup
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[0072]Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.
[0073] method embodiment
[0074] A specific embodiment of the present invention discloses a method for quickly stabilizing the scale factor of a closed-loop fiber optic gyroscope, such as figure 1 shown.
[0075] Implementation includes the following steps:
[0076] Step S1: Model and calculate the coefficients of the Steinhart-Hart equation, and establish the closed-loop fiber optic gyroscope SLD thermistor core temperature T and the digital equilibrium point voltage V according to the Steinhart-Hart equation IN Correspondence;
[0077] Step S2: modeling and calculating the fitting coeffi...
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The invention relates to a closed-loop optic fiber gyro scale factor fast stabilization method and device, belongs to the field of closed-loop fiber optic gyro scale factor error suppression, and solves the problem that a closed-loop fiber optic gyro has a large scale factor error and a long startup time in a startup process. The method comprises the following steps: modeling for calculating coefficients of Steinhart-Hart equation, and establishing a corresponding relationship between SLD thermistor core temperature T and digital equilibrium point voltage VIN of the closed-loop fiber optic gyro according to the Steinhart-Hart equation; modeling for calculating fitting coefficients of SLD thermistor core temperature change amount DELTAT and scale factor change amount DELTA K; extracting balance point voltages of a temperature control bridge circuit to obtain digital balance point voltages; according to the digital balance point voltages, obtaining the temperature corresponding to a current digital balance point voltage by the corresponding relationship between the T and the VIN, and using the temperature corresponding to the current digital balance point voltage and a scale factor compensated by a current scale factor temperature field to obtain a final gyro scale factor. The scale factor fast stabilization of the closed-loop optic fiber gyro is realized.
Description
technical field [0001] The invention relates to the technical field of suppression of scale factor errors of closed-loop fiber optic gyroscopes, in particular to a method and device for quickly stabilizing the scale factor of closed-loop fiber optic gyroscopes. Background technique [0002] As a representative of the new generation of optical gyroscopes, the closed-loop fiber optic gyroscope has the characteristics of fast response, large dynamics, low power consumption, and high precision. It has been widely used in missile-borne, airborne, satellite, ship, artillery and other fields. A closed-loop fiber optic gyro with excellent performance is not only reflected in excellent static performance, but also has excellent dynamic performance in the full temperature range, mainly characterized by good scale factor stability. [0003] As modern weapon systems put forward higher requirements for fast and precise response, the fast start-up performance of the closed-loop fiber opti...
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IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 谢良平刘卓李彬马海全
Owner 中航捷锐(西安)光电技术有限公司