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Режимы вращательного движения ИСЗ с малым уровнем остаточных микроускорений

Режимы вращательного движения ИСЗ с малым уровнем остаточных микроускорений

Abstract

Residual accelerations on board a designed spacecraft intended for experiments in microgravity sciences are estimated. Three modes of the spacecraft attitude motion are considered: a passive gravitational orientation, an active gravitational orientation, and a single-axis solar orientation. The motion in the first and the second modes is close to a rest position of the spacecraft with respect to the orbital coordinate system, the spacecraft orbit being almost circular one. The motion in the third mode is as follows: the normal to the plane of spacecraft solar arrays is constantly directed to the Sun, the absolute angular rate of the spacecraft is practically equal to zero. The second and the third orientation modes are implemented by electromechanical actuators (a gyro system). At that the third mode provides additionally a decrease of the angular momentum of the gyro system due to the special choice of the spacecraft turning about the normal to the solar arrays. The acceleration estimates are obtained by mathematically modeling the spacecraft attitude motion, taking into account the gravitational and the aerodynamic torques acted upon the spacecraft, as well as the control torques produced by the gyro system.

Получены оценки квазистатических микроускорений на проектируемом искусственном спутнике Земли, предназначенном для проведения космических экспериментов в области микрогравитации. Рассмотрены три режима вращательного движения спутника: пассивная гравитационная ориентация, активная гравитационная ориентация и одноосная солнечная ориентация. В первых двух режимах движение спутника близко к положению его покоя в орбитальной системе координат, существующему на круговой орбите. В третьем режиме нормаль к светочувствительной стороне солнечных батарей направлена на Солнце, угловая скорость спутника близка к нулю. Второй и третий режимы поддерживаются электромеханическими исполнительными органами двигателями-маховиками или гиродинами, причем в режиме солнечной ориентации спутник поворачивается вокруг направления на Солнце так, чтобы ограничить рост накапливаемого кинетического момента исполнительных органов. Оценки получены с помощью математического моделирования вращательного движения спутника с учетом действия на него гравитационного и аэродинамического моментов, а также с учетом функционирования органов управления.

Keywords

СПУТНИК, МИКРОГРАВИТАЦИЯ, МИКРОУСКОРЕНИЯ, МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ ВРАЩАТЕЛЬНОГО ДВИЖЕНИЯ СПУТНИКА, ГИРОСИСТЕМА

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
bronze
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