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Linear dynamic modeling of spacecraft with various flexible appendages and on-board angular momentums

Alazard, Daniel and Cumer, Christelle and Tantawi, Khalid Linear dynamic modeling of spacecraft with various flexible appendages and on-board angular momentums. (2008) In: 7th International ESA Conference on Guidance, Navigation & Control Systems (GNC 2008), 2 June 2008 - 5 June 2008 (Tralee, Ireland).

(Document in English)

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We present here a method and some tools developed to build linear models of multi-body systems for space applications (typically satellites). The multi-body system is composed of a main body (hub) fitted with rigid and flexible appendages (solar panels, antennas, propellant tanks,...) and on-board angular momentums (flywheels, control moment gyros). Each appendage can be connected to the hub by a cantilever joint or a pivot joint. More generally, our method can be applied to any open mechanical chain. In our approach, the rigid six degrees of freedom (d.o.f) (three translational and three rotational) are treated all together. That is very convenient to build linear models of complex multi-body systems. Then, the dynamics model used to design AOCS, i.e. the model between forces and torques (applied on the hub) and angular and linear position and velocity of the hub, can be derived very easily. This model can be interpreted using block diagram representation.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
French research institutions > Office National d'Etudes et Recherches Aérospatiales - ONERA (FRANCE)
Laboratory name:
Deposited By: Daniel Alazard
Deposited On:14 Jan 2009 10:33

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