Download e-book for iPad: Automatic Control in Space 1985. Proceedings of the Tenth by France) IFAC Symposium (10th : 1985 : Toulouse, J. P.

By France) IFAC Symposium (10th : 1985 : Toulouse, J. P. Chretien

ISBN-10: 0080325564

ISBN-13: 9780080325569

Offers an authoritative evaluation of the hot advancements and technical advances within the functions of computerized keep an eye on to house know-how. subject matters lined comprise: geostationary satellites, medical satellites, versatile structures, low earth orbit satellites, orbit and trajectory keep an eye on, part expertise, systems, rendez-vous and docking (RVD) and manipulators. includes 39 learn and assessment papers.

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Additional info for Automatic Control in Space 1985. Proceedings of the Tenth IFAC Symposium, Toulouse, France, 24–28 June 1985

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A non-neglectible differential pointing (15 % of the bending mode amplitude) . weak effects of bending modes on the useful signal . g. reflector edge translations). S. M. transfer function. M. 72 Hz ^6M? M. M. S. M. S. S. M. S. S. and AOCS Fig. 6. M. S. CONFIGURATION REFERENCE a = 0 6 = 0 DIFFERENTIAL POINTING between the difference diagram cavity and the maximum of the useful antenna diagram. 057°**< (a) LONGI-AXISYM. 9 SENSOR GAIN variation Fig. 7. Main effects of reflector deformations on RF detection CONTROL CONCEPTS ANALYSIS AND SELECTION Control Concepts Classification The flexible structures control may deal with three classes of problems : .

Y, . A. X, Ύ, Χ2 Υ2 V V cv \ Fig. 13. 14 show ty­ pical performances obtained with active control of flexible modes during station-keeping maneu­ vers. These simulations take into account : the 30 N thrust along the Y axis, liquid sloshing, the effect of which is quite preponderant in roll pointing, short-term perturbations : 1 Nm with a known 90% part, sensors noise, thrusters width modulation. r2l A decentralized control of reflector shape, based on specific addidiontal sensors and actu­ ators, may be added to a control system not including reflector modes control.

The low pass filtering was performed to remove spurious signals from the accelerometer data. 1 and 1 Hz, respectively). The HGA control law equations were implemented in digital simulation in a laboratory computer. The test software was designed so that test cases could be easily modified by changing gains of conditions at the computer terminal by the test operator. Test data from the accelerometers was recorded on FM tape for later digitizing and use in simulations for line of sight jitter evaluations.

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Automatic Control in Space 1985. Proceedings of the Tenth IFAC Symposium, Toulouse, France, 24–28 June 1985 by France) IFAC Symposium (10th : 1985 : Toulouse, J. P. Chretien

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