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STUDY OF DYNAMIC VIEWPOINTS IN SATELLITE DESIGN

STUDY OF DYNAMIC VIEWPOINTS IN SATELLITE DESIGN. D. Galarreta(1), P.J. Charrel (2), T. Orel (3), B. Rothenburger (4), B. Trousse (5), C. Vogel (6) (1)CNES;(2) IRIT-UT1; (3)Europia productions;(4) INRIA-IRIT ; (5) INRIA Sophia-Antipolis ; (6) Pôle Universitaire Léonard de Vinci.

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STUDY OF DYNAMIC VIEWPOINTS IN SATELLITE DESIGN

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  1. STUDY OF DYNAMIC VIEWPOINTS IN SATELLITE DESIGN D. Galarreta(1), P.J. Charrel (2), T. Orel (3), B. Rothenburger (4), B. Trousse (5), C. Vogel (6) (1)CNES;(2) IRIT-UT1; (3)Europia productions;(4) INRIA-IRIT ; (5) INRIA Sophia-Antipolis ; (6) Pôle Universitaire Léonard de Vinci

  2. Viewpoints in satellite design A viewpoint is the manner attached to a person or a group to represent the technical world within which they operate.

  3. Views from different viewpoints « Ground Segment » view : Operation Control Centre « Attitude Control » view « Onboard power » view : Power storage « Thermal Control » view

  4. Confrontation and Correlation of viewpoints • Before any interaction is considered the viewpoints virtually exist ; • If the viewpoints interact one says that there is a confrontation of viewpoints. One can assess the views dependencies ; • If the views which are produced are semantically and logically compatible one says that the viewpoints are correlated.

  5. Objects • Whenever a view is produced ignoring any other view : the view designates a virtual object ; • When there is a confrontation of viewpoints, a view designate an actualized object ; • When all the considered viewpoints are correlated, a view designate a realized object

  6. The correlation problem Given a viewpoint modelling, how can we model the correlation of viewpoints in order that a realized object emerges ?

  7. Argumentative approach of viewpoints • Interaction spaces : • Argumentation space ; • Communication space ; • Solving problem space • Elementary arguments : • Topoï • Isotopies : • Work (W) • Fashion (F) • Purpose (P) • Aesthetic Form (E) • Representation (R)

  8. An approach of viewpoints based upon statistical association of terms • Clusterisation • AFT profile construction • Scenario production • Viewpoints

  9. A multi-agent paradigm approach :A diachronic model • A generic model • An instanciation of it : • the Alceste methodology • -Class A : Compress, How many, Year , Apogée, arrival, Tank, Bit, Cells, Hundred, Figures (numbers), Five, Fifty, Coefficient, Cube, Degree, … • Class B : Elsewhere, Point, Really, Altitude, Analyse, Antenna, Advantage, Bilan, Box, Camera, Control, Bother, Problem, Exist, … • Class C : Show, Transmit, Now, Aerospace, Probably, Ariane, Asteroide, Astronautic, autonomy, bitsy, onboard, Camera, Chain, … • Class D : Know, Write, Must, Finish, Open, Can, Transform, Know (by study), Remember, See, Will, Enough, As much, At last, Some, Always, Architecture, Thematic dynamic (Discursive dynamic )

  10. Correlation of viewpoint : toward a restatement of the problem 1/2 A condition in order that different viewpoints can interact together, is their sharing of a same space ; Definition : A virtual interaction of viewpoints is identified to a space ; a space is the set of the viewpoints which are virtually in interaction.

  11. Correlation of viewpoint : toward a restatement of the problem 2/2 • The correlation of viewpoints is gradual • It manifests itself through the emergence of places • It develops until the production of objects The weak correlation problem : • Given a technical space • Be able to identify an emergence of places and its dynamic

  12. A correlation model in the argumentative approach

  13. Propulsion Image Demonstration Giga bits Bit second Projectile A correlation model in the lexicometrical approach

  14. A diachronic Model for viewpoint correlation based on the Alceste Methodology • The general variation of the curves • built upon statistical classes are • interpreted against : • the discourse of each designer ; • the general movement of thisdiscourse in terms of solving thetask given. Thematic dynamic (Discursive dynamic )

  15. Conclusion • This article aimed to make the readers aware of the notion of “ viewpoint ” and “ correlation of viewpoints ” which are central for the analysis of a complex design activity (in particular for the manager of design projects) ; • The "theoritical" step was to recognized the importance of the constitution of places as a step toward the solution of the correlation problem we introduced.

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