Research on the Temperature Compensation Technology of Closed-Loop Fiber Optic Gyro

FOG Sagnac effect is based on the angular velocity sensor . At present , the domestic fiber optic gyro development and manufacturing, has made great progress, however, and there is still a considerable gap abroad . Temperature effects are precision fiber optic gyroscope applications in engineering a key issue that must be addressed . In this paper, the closed-loop interferometric fiber optic gyro temperature characteristics of the theoretical analysis , we propose a DSP-based signal processing temperature compensation programs, and for the relevant experimental study . First , this paper systematically introduces the basic theory of fiber optic gyroscopes , including fiber optic gyroscope works, classification , performance indicators and calculation methods. And closed-loop interferometric fiber optic gyro error sources conducted in-depth research on the various components were carried out performance analysis. Secondly , this paper focuses presents a DSP signal processing core closed-loop interferometric fiber optic gyro temperature compensation scheme . Fiber optic gyroscope affected by temperature, mainly in the fiber optic ring light source and integrated optical devices resulting temperature drifts . Thesis mainly light from the fiber ring and two for temperature compensation , temperature compensation through the fiber optic ring system restructuring, on the wavelength of the light source and optical power stabilization measures were taken , as well as the use of advanced control algorithms and a series of measures , not only to improve a fiber optic gyroscope accuracy , and can shorten the warm-up time . Finally, from the study of fiber optic gyroscope system accuracy of both the departure and the warm-up time , was investigated experimentally . Experimental results demonstrate the effectiveness of the temperature compensation scheme , its findings can be fiber optic gyroscope follow-up study to provide reference and guidance.