519.6 Simulation and optimization of spacecraft flight control from Earth orbit to Venus orbit using ion thrusters

Mozzhorina T. Y. (Bauman Moscow State Technical University), Zakurazhnaya A. A. (Bauman Moscow State Technical University)

OPTIMAL CONTROL, FLIGHT BETWEEN THE ORBITS OF EARTH AND VENUS, SHOOTING METHOD, ION THRUSTERS, PONTRYAGIN MAXIMUM PRINCIPLE, NUMERICAL METHODS, BOUNDARY VALUE PROBLEMS OF ORDINARY DIFFERENTIAL EQUATIONS


doi: 10.18698/2309-3684-2022-2-88101


In this paper, optimization of the flight of a low-mass satellite from Earth orbit to the orbit of Venus using ion engines is considered. The first flight to the planet took place in 1961 by the Soviet automatic interplanetary station "Venus-1", which passed 100,000 kilometers from Venus. In addition, in 1962, the American station "Mariner-2" was flown. The most recent spacecraft launched to the planet was the European Space Agency's Venus Express in 2005, which flew to Venus in 153 days. When solving the current problem, the following assumptions were made: an interorbital flight is considered without taking into account the attraction of the planets, and the orbits of the planets are considered circular and lying in the same plane. The angle between the tangential velocity of the spacecraft and the thrust direction was chosen as the control. Optimization of satellite control was carried out using the Pontryagin maximum principle. The resulting boundary value problem for a system of ordinary differential equations was solved by a numerical method — the targeting method. Newton's method was used to solve systems of nonlinear algebraic equations. The calculation program was written using the C++ programming language. As a result of the work, it was possible to minimize the flight time between orbits, thus the operability of the shooting method for solving optimization problems was shown.


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