açık çevrim fiberoptik jiroskop için yeni bir açısal hız modellemesi

Abstract

 Sensitive angular velocity measurement  Extended measurement range  Cost effective fiberoptic gyroscope Fiber optic gyroscopes are optoelectronic technology products that are sensitive to angular velocity. In this study, a cost-effective open loop optical fiber gyroscope configuration is proposed, which can accurately measure the angular velocity of rotating objects. By performing a harmonic analysis of the signal at the gyroscope output, a novel angular velocity model that correlate the angular velocity of rotation with high accuracy is presented. Using this model in an open-loop fiber gyroscope, it has been shown that angular velocity can be measured at a wider measuring range with higher measurement sensitivity. Purpose: This paper has multiple purposes. The main purpose is to present a novel open loop fiber optic gyroscope design to more accurately measure the angular rotation speed in a wider measuring range. Other objectives are to perform time and frequency domain analysis of the fiberoptic gyroscope, to determine the relationship between the first and second harmonics changing with angular velocity and to develop a low cost and uncomplicated gyroscope design for experimental studies. Theory and Methods: Harmonic analysis of the gyroscope demonstrates that the 1st and 2nd harmonics show periodic changes with the circular velocity. By deriving the difference of harmonics, a highly accurate output signal associated with angular velocity and can be generated. A more precise angular velocity measurement can be performed in a wider dynamic measurement range using the obtained gyroscope signal. Analysis and testing of the presented model is simulated in Matlab software. Furthermore, the proposed fiber gyroscope system has been successfully installed to obtain real-time measurements. Results: Both the graphs generated from the simulation studies and the experimentally obtained data clearly demonstrate the gyroscopic properties overlapping each other. All results clearly show that the proposed model increases the dynamic range of the gyroscope and its sensitivity to angular velocity. In the experimental measurements performed within the 0 to 0.7 rad/s angular velocity measurement range, the smallest angular velocity that can be measured is 5.10-4 rad/s and the corresponding 1st harmonic amplitude is-93.5dB. Conclusion: The studies presented in this paper contribute to the development of a cost effective gyroscope. The proposed design method increases the measurement accuracy and range of the open loop fiberoptic gyroscope.