The Space Station is a Laboratory that presents, in general, a good base for a big variety of payloads, even having different or conflicting requirements. In nominal conditions the ISS is characterized by a large inclination of the orbit (51.6 deg) and by an attitude close to LVLH during the TEA (Torque Equilibrium Attitude) mode. The Station fullfils the great part of the experiments requirements, but few specific kinds of instruments have pointing requirements that impose the use of a pointing system. ESA has indentified, for the Space Station, two pointing systems: Coarse Pointing Device (CPD) and Hexapod. While the first, devoted to Solar/Astronomy observation payloads, requires a coarse accuracy (1 deg) over a big range (+/-40 deg), the second, dedicated to SAGE III, can be used to point with an accuracy of +/- 30 arcsec over a shorter range (+/- 10 deg). This paper presents a description of an Hexapod pointing system designed for a specific application. The system requirements, scenario and performances for the particular application are summarized in the paper, together with the main kinematics, mechanical and electronic aspects. The paper summarizes the output of the kinematic analysis outlining the main results in terms of motion strategies, kinematic algorithms and working envelopes, both when in normal conditions and when degraded due to an actuator failure.
Hexapod pointing system
Beschreibung des HEXAPOD-Systems für die Ausrichtung des Satellitensystems des SAGE III - Projektes
1997
8 Seiten, 12 Bilder, 1 Tabelle
Conference paper
English
British Library Conference Proceedings | 1997
|British Library Online Contents | 1997
|British Library Online Contents | 1997
|British Library Conference Proceedings | 1996
|British Library Online Contents | 1996
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