Transcript 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
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.
Views from different viewpoints
« Ground Segment » view : Operation Control Centre
« Attitude Control » view
« Onboard power » view :
Power storage
« Thermal Control » view
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.
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
The correlation problem
Given a viewpoint modelling, how can we model the correlation of
viewpoints in order that a realized object emerges ?
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)
C= (W, R, F, E, P)
Design
Process
(W)
Design
Représentation
(R)
Designed
Object
(F)
(E)
(P)
An approach of viewpoints based
upon statistical association of terms
•
•
•
•
Clusterisation
AFT profile construction
Scenario production
Viewpoints
A multi-agent paradigm approach
:A diachronic model
• A generic model
• An instanciation of it :
• the Alceste methodology
correlation sur la classe A
0,05
0,03
175
169
163
157
151
145
139
133
127
121
115
109
97
91
103
85
79
73
67
61
55
49
43
37
31
7
25
-0,01
19
1
0,01
13
-Class A : Compress, How many, Year , Apogée,
arrival, Tank, Bit, Cells, Hundred, Figures
(numbers), Five, Fifty, Coefficient, Cube,
Degree, …
temps
-0,03
-0,05
-0,07
-Class B : Elsewhere, Point, Really, Altitude,
Analyse, Antenna, Advantage, Bilan, Box,
Camera, Control, Bother, Problem, Exist, …
-0,09
-0,11
th-t
-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,
t-f
th-f
Thematic dynamic
(Discursive dynamic )
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.
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
A correlation model in the
argumentative approach
Significant Factor
of the Argumentative Space
isotopy
F
Significant Factor
of the Problem Solving Space
Steps
isotopy
P
1
2
isotopy
W
W
F
Step 2
Correlation Space
P
3
A correlation model in the
lexicometrical approach
Propulsion
Giga bits
Bit second
Image
Demonstration
Projectile
A diachronic Model for viewpoint
correlation based on the Alceste
Methodology
correlation sur la classe A
0,05
0,03
175
169
163
157
151
145
139
133
127
121
115
109
97
91
103
85
79
73
67
61
55
49
43
37
31
7
25
-0,01
19
1
0,01
13
The general variation of the curves
built upon statistical classes are
interpreted against :
• the discourse of each designer ;
• the general movement of this
discourse in terms of solving the
task given.
temps
-0,03
-0,05
-0,07
-0,09
-0,11
th-t
t-f
th-f
Thematic dynamic
(Discursive dynamic )
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.