Abstract
The way to improve the accuracy of measurements of fiberoptic gyroscope (FOG) OIUS501 production of Russian company «Optolink» is examined. The studies were conducted to assess the use of these sensors to control the orientation of the satellite. The experiment was carried in a heat chamber in rising and lowering the temperature in given (selected) range. The experimental data were subjected to the averaging and smoothing. Several mathematical models depending on the temperature drift of the FOG and the rate of temperature change are proposed. To assess the quality of the approximation the criterion of a minimum average error of measurements approximation and the criterion of minimum rootmean- square deviation of approximation error are used. In result the model was selected, which allows to reduce the variability of the drift of FOG in the launch from the values 2°deg / h to the level of 0,05 deg / h.
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