In general, a multibody system consists of flexible bodies, interconnected through members which are also flexible, often very flexible. The kinematic conditions of the system may exhibit an unstable behavior for some of the bodies, whereas for other bodies the behavior is stable. As a very simple example, one can think of two independent bars, the first one in orbit in horizontal (unstable) position, and the other one in vertical (stable) position. If the two bodies are connected through a hinge, a very complicated motion may arise, that can sometimes reach a chaotic character. If the connections between the members are sufficiently stiff, with a proper choice of the inertial characteristic (which dedicate dynamic stability in orbit), the bodies of the system as a whole can reach stable configuration even with unstable motion: as an example, one can think again of the two bars now rigidly connected, in such a way that the resulting inertia tensor allows dynamic stability. The situation is even improved if one has an adaptive control system, providing the required stiffening (or damping) where such a need arises. This can be done via an intelligent system (e.g. piezo or shape memory alloys) able to generate internal foreces capable of driving the system and/or the parts of the system to the overall configuration(s) leading to stability. The dynamic formulation of the problem includes the mathematical models of the different parts of the connections, which are also considered as flexible structures. The calculations will be performed using a tridimen- sional approach and taking advantage of the so-called Quaternions model which allows to overcome the singularity problems connected with the Euler's angles model.
Control Of Flexible Multibody Systems By Means of Intelligent Structures / P., Santini; F., Betti; Gasbarri, Paolo; A., Rossi. - STAMPA. - (1993), pp. 585-602. ((Intervento presentato al convegno 2nd International Conference of Aeronautics: Dynamics tenutosi a Cranfield Institute of Technology, UK, nel 6-10 September 1993.
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|Titolo:||Control Of Flexible Multibody Systems By Means of Intelligent Structures|
|Data di pubblicazione:||1993|
|Citazione:||Control Of Flexible Multibody Systems By Means of Intelligent Structures / P., Santini; F., Betti; Gasbarri, Paolo; A., Rossi. - STAMPA. - (1993), pp. 585-602. ((Intervento presentato al convegno 2nd International Conference of Aeronautics: Dynamics tenutosi a Cranfield Institute of Technology, UK, nel 6-10 September 1993.|
|Appartiene alla tipologia:||04b Atto di convegno in volume|