Abstract
Quasi-static microaccelerations are estimated for a satellite specially designed to perform space experiments in the field of microgravity. Three modes of attitude motion of the spacecraft are considered: passive gravitational orientation, orbital orientation, and semi-passive gravitational orientation. In these modes the lengthwise axis of the satellite is directed along the local vertical, while solar arrays lie in the orbit plane. The second and third modes are maintained using electromechanical executive devices: flywheel engines or gyrodynes. Estimations of residual microaccelerations are performed with the help of mathematical modeling of satellite’s attitude motion under the action of gravitational and aerodynamic moments, as well as the moment produced by the gyro system. It is demonstrated that all modes ensure rather low level of quasi-static microaccelerations on the satellite and provide for a fairly narrow region of variation for the vector of residual microacceleration. The semi-passive gravitational orientation ensures also a limited proper angular momentum of the gyro system.
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Original Russian Text © A.I. Ignatov, V.V. Sazonov, 2012, published in Kosmicheskie Issledovaniya, 2012, Vol. 50, No. 5, pp. 380–393.
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Ignatov, A.I., Sazonov, V.V. Realization of modes of satellite attitude motion with a small level of microaccelerations using electromechanical executive devices. Cosmic Res 50, 353–366 (2012). https://doi.org/10.1134/S0010952512050024
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DOI: https://doi.org/10.1134/S0010952512050024