ON THE INFLUENCE OF THE ELASTICITY OF COMPONENTS IN A SPINNING SATELLITE ON THE STABILITY OF ITS MOTION,
LOUVAIN UNIV (BELGIUM)
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When a rigid body in free space is spinning around one of its principal axes, besides the three translational modes with zero frequency and one rotational mode of zero frequency around the spin axis, one may consider two rotational modes of small amplitudes of oscillations around the two remaining axes, which will be called nutational modes. Their frequencies do not vanish and are only real if the spinning motion is stable.. If now the body is allowed to be slightly elastic, the frequencies of the nutational modes will be altered, but at the same time there will appear new frequencies corresponding to the so-called elastic modes. Natural stability of such systems and stability of spinning motion in magnetic and gravitational fields are important questions and must be considered when designing spin stabilized satellites. This investigation is conceived on a general basis and brings up only the broad features of a rather complex problem.
- Unmanned Spacecraft