RUDN Engineers Show the Way to Control Satellite Formations More Effectively
Some space missions use not one satellite, but several at once. It is necessary for example when it they need to observe one object on the surface of the Earth at different angles at the same time. In this case, satellites do not act independently, as for instance in navigation or telecommunication systems, but together — they constantly exchange information and adjust their relative movement. Such groups of satellites are called formations. They provide joint data on various objects on the Earth’s surface and in near-Earth space, but for this it is necessary to solve a complex optimization problem — to choose the optimal parameters for controlling the relative motion of satellites. A RUDN University engineers together with colleagues from Malaysia proposed how to simplify the calculation of the optimal control of the formation of satellites. It helps finding the optimal characteristic velocity that determines the required fuel consumption and increasing the efficiency of satellite formation control with minimal calculations.
“Our main goal is to simplify the on-board calculation of the optimal characteristic velocity, delta-v, and the corresponding orbital maneuver for controlling the formation of satellites. We have shown that the delta-v value can be found graphically instead of the traditional solution of complex dynamic equations,” said Yury Razoumny, Doctor of Technical Sciences, Director of the Department of Mechanics and Control Processes of RUDN University.
Scientists simulated a coordinated orbital maneuver of a formation of two satellites when observing a given ground object. At the same time, it is necessary to spend as little fuel as possible and provide the necessary monitoring conditions. The calculation of the optimal delta-v value is reduced to the analysis of possible options on the graphs of changes in the main parameters of the orbital motion of satellites in the formation. The best option is selected using a simple analysis of these graphs.
“This method is particularly well suited for observing objects on the earth’s surface. It allows, with low computational costs, to determine the lowest characteristic speed for the orbital maneuver of the formation satellites with the joint observation of the required object on the Earth’s surface,” said Yury Razoumny, Doctor of Technical Sciences, Director of the Department of Mechanics and Control Processes of RUDN University.
Results are published in Acta Astronautica.
RUDN summarized the results of the scientific competition "Project Start: work of the science club ". Students of the Faculty of Physics, Mathematics and Natural Sciences have created a project for a managed queuing system using a neural network to redistribute resources between 5G segments. How to increase flexibility, make the network fast and inexpensive and reach more users — tell Gebrial Ibram Esam Zekri ("Fundamental Computer Science and Information Technology", Master's degree, II course) and Ksenia Leontieva ("Applied Mathematics and Computer Science", Master's degree, I course).
The National Demographic Report, 2023 Demographic Well-Being of Russian Regions (hereinafter - the National Demographic Report) was prepared by the scientific team of the Institute of Demographic Studies of the Federal Research Center of the Russian Academy of Sciences, the Vologda Scientific Center of the Russian Academy of Sciences, Peoples' Friendship University of Russia, the Center for Family and Demography of the Academy of Sciences of the Republic of Tatarstan, as well as with the participation of leading scientists from the Republic of Bashkortostan, Stavropol Krai, Volgograd, Ivanovo, Kaliningrad, Nizhny Novgorod, Sverdlovsk Oblasts and Khanty-Mansi Autonomous Okrug–Yugra.
RUDN summarized the results of the scientific competition "Project Start: work of the science club ". Students of the Faculty of Physics, Mathematics and Natural Sciences have created a project for a managed queuing system using a neural network to redistribute resources between 5G segments. How to increase flexibility, make the network fast and inexpensive and reach more users — tell Gebrial Ibram Esam Zekri ("Fundamental Computer Science and Information Technology", Master's degree, II course) and Ksenia Leontieva ("Applied Mathematics and Computer Science", Master's degree, I course).
What is your first association with the word “laboratory”? Flasks and beakers? Microscopes and centrifuges? Yes, many of us would answer the same way.
The National Demographic Report, 2023 Demographic Well-Being of Russian Regions (hereinafter - the National Demographic Report) was prepared by the scientific team of the Institute of Demographic Studies of the Federal Research Center of the Russian Academy of Sciences, the Vologda Scientific Center of the Russian Academy of Sciences, Peoples' Friendship University of Russia, the Center for Family and Demography of the Academy of Sciences of the Republic of Tatarstan, as well as with the participation of leading scientists from the Republic of Bashkortostan, Stavropol Krai, Volgograd, Ivanovo, Kaliningrad, Nizhny Novgorod, Sverdlovsk Oblasts and Khanty-Mansi Autonomous Okrug–Yugra.