## Control of a spinning drag-free satellite with an application of estimation theory |

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### Contents

INTRODUCTION | 1 |

EQUATIONS OF MOTION AND LINEAR CONTROL | 7 |

Dragfree satellite geometry | 8 |

54 other sections not shown

### Common terms and phrases

analysis apparent center atmospheric drag Av/r w Bode plot body-fixed forces center-of-mass estimate center-of-mass location center-of-mass offset Chapter circular deadspace components constant control effort control law control parameters control-force cx cy deadspace shape disturbing accelerations equilibrium point error sources errors caused estimation errors estimation theory ex ex external disturbing forces g/mm gain matrix given by Eq in-track trajectory error inertial input integral controller jets laboratory simulator lead compensation limit cycle linear controller locus Luenberger magnitude mass-attraction modulator nondimensional o.oio observer mechanization on-off controller orbit plane output proof mass proof-mass position rad/s real dynamical system reference frame Eqs result root locations Root locus rotating Schmitt trigger sensor null specific force spin rate spinning drag-free satellite square deadspace stable tion translational control trapping phenomenon TRAPPING REGIONS TRAPPING SOLUTION typical vector velocity yield zero