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Исследование оптимального трехимпульсного перехода на высокую орбиту…

Инженерный журнал: наука и инновации

# 9·2017 23

Investigating the optimal three-impulse transfer into

the high orbit of the artificial lunar satellite

© E.S. Gordienko

Lavochkin Science and Production Association,

Khimki town, Moscow region, 141402, Russia

Bauman Moscow State Technical University, Moscow, 105005, Russia

The article examines the problem of optimum spacecraft ascent from the Earth into the

high circular polar orbit of the artificial lunar satellite with the radius of 6000 km using

the three-impulse bi-elliptic scheme of the so called “Shternfeld” transfer. We have car-

ried out this analysis by taking into account the disturbances from the lunar field noncen-

trality, the Earth and the Sun gravitational fields as well as the engine thrust finiteness.

The optimum trajectory is defined by varying both impulse control parameters and their

application points. The analysis consists of two stages. At the first stage we consider two

options of impulse orientation in the ideal impulse occurrence: at first the impulse orien-

tation is set in the osculating plane by “pitch” γ and “attack”

ߙ

angles; then the “yaw”

angle ψ (angle of departure from the plane) is added. It is shown that with the increase of

the maximum distance r

ߙ

the optimal points of the impulses application are shifted from

the apsidal points of the orbits. At the same time the second, intermediate impulse is not

directed along the current velocity vector. In the first, “flat” option of the impulse orien-

tation we get characteristics which are similar to the ideal impulse apsidal case. In the

second, “spatial” variant the spacecraft remaining mass slightly increases. At the second

stage we take into account the engine thrust finiteness. The results obtained are very

close to the impulse case.

Keywords:

spacecraft, trajectory optimization, artificial lunar satellite, three-impulse

bi-elliptic scheme, “Sternfeld” transfer, Powell’s quasi-Newton method

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