Architecture Modeling - SPES 2020

Architecture Modeling
zones such as cargo bay or engine bay. In order to describe the external structure of a geometric
component there can be a shape.
Geometric component installations are specialized rich component properties. Having the
role of rich component parts they are instances of geometrical components and therefore typed
by them. Instantiated technical components can be allocated to these installations. I.e. a technical
ECU of a car is allocated to an installation of a representing geometrical component. Geometric
installations can be location installations or routed installations. A location installation
refers to a defined location of the containing geometric component. The location installation
specifies that a geometric component of its type is installed to that location and therefore to the
position which is specified by the translation releative to the reference system of the containg
geometric component. I.e. an acceleration sensor is installed to a location x = 0m, y=-20cm and
z=1,2m relative to the middle of the car. Routed installations declare a route for a geometric
component along several component links. They are used for layable components like cables or
pipes. I.e. in the car the mentioned acceleration sensor is connected to an ECU in the cargo bay
by a cable component that is layed via several locations with a total length of 3 m.
Geometric failures are specialized failure conditions. They describe failure conditions which
have effects on geometric structures. Therefore, a geometric failure can have a shape property
which describes the sphere of effect that a geometric failure has. I.e. the battery of a car can
explode and damage other components inside a sphere with a radius of 20 cm.
Geometric Coordinates Figure 3.19 provides an overview on concepts to describe geometric
coordinates.
GeometricScaling
+length 0..1 +width 0..1 +height 0..1 +x 0..1
GeometricTranslation
+y 0..1
Expression
+z 0..1+roll
0..1
GeometricRotation
+pitch 0..1
+yaw 0..1
Figure 3.19: Concepts of the geometrical perspective to cover coordinates.
Geometric coordinates are relative to the respective reference system. They are given by
geometric scaling, geometric, translation and geometric rotation.
Geometric Shapes Figure 3.20 provides an overview on concepts to describe geometric
shapes.
Geometric shapes describe the shape of a geometric component or the sphere of effect of a
geometric failure. They can be primitive shapes such as spheres, cylinders or cuboids. A sphere
is defined by its radius, a cylinder is defined by its radius and its length and a cuboid is defined
by its length, its width and by its height. A shape can be a mesh. A mesh is a user defined shape
which consists of vertices and edges. The position of a vertex is given by a translation relativ
to its reference system. Edges connect vertices. A complex shape is defined by a composite
shape. A composite shape consists of shape properties as operands respectively typed by shapes.
A shape composition operator defines how the operands together provide a shape. The shape
operators are defined as follows:
28/ 156