Óbuda university john von neumann faculty of informatics institute of applied mathematics

Course Situation and Event Driven Models for Multilevel Abstraction Based Virtual

Engineering Spaces

Óbuda UniversityJohn von Neumann Faculty of Informatics

Institute of Applied Mathematics

Lecture and laboratory 1.

Feature driven contextual modeling

László Horváth university professor

http://users.nik.uni-obuda.hu/lhorvath/

A prezentációban megjelent képernyő-felvételek a CATIA V5 PLM rendszernek, az Óbudai Egyetem Intelligens Mérnöki Rendszerek Laboratóriumában telepített installációján készültek, valóságos működő

modellekről, a rendszer saját eszközeivel.

Ez a prezentáció szellemi tulajdon. Hallgatóim számára rendelkezésre áll. Minden más felhasználása és másolása nem megengedett!

CATIA V5 PLM rendszer a Dassult Systémes Inc. és a CAD-Terv Kft segítségével üzemel laboratóriumunkban

László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/

Principle and modeling by features

Demand Solution

Information loss free information exchange

IPIM, product model (ISO 13303), AP

Engineering task specific model objects Form feature driven product definition

1990-2000


Feature Modifies model by a definite manner through contextual connections with previously

defined features.

Feature driven modelingConstruction of product model by a series of features.

Three leveled modeling of form features


Level 1: Application feature

Level 2: Form feature

Level 3: Form feature representation

Form Feature Information Model (FFIM)

Application specific attributes

The form feature itself

Boundary representation

Groups of form features


Dress-Up

Surface-Based

Reference Elements

Associating Bodies

TransformationsTranslations and rotations

Patterns

These groups are defined according to modification principle and method.In practice, these groups are divided to subgroups according to the purpose of the modification.

Features

Form

Volume adding

Volume subtracting

Connecting features

On edge

On surface

On shell

Volume adding form features


Volume subtracting form features


Dress-Up form features - On edge


Dress-Up form features - On surface


Dress-Up form features - On shell


Surface-Based form features


Transformation form features - rotation


Transformation form features - Patterns


Reference Element form features


Associating Bodies form features


Associating bodies form features


Feature parameters

László Horváth UÓ-JNFI-IAM http://nik.uni-obuda.hu/lhorvath/

Dimension

Limiting featureCurve

Surface

Chain of lines and curves

Constraints

Shape adding feature

Reference feature

Activeness

Feature parameters


Dimension, constraints, and shape adding chain of lines and curves

Limiting feature parameters


Activeness feature parameters


Contextual chain of features – principle


F1 P1 F2 P3

XY plane Plane Pl

Offset of the XY plane

F3 P2

Contour Co

In the XY plane Pl

Branch in a graph structure

Understanding form features


Laboratory task SEMAL2E1

This task is composed by the examples of feature and feature parameter types on slides 6-37

Óbuda university john von neumann faculty of informatics institute of applied mathematics

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