Advanced Modelling for Cad/CAM Systems

ISBN-13: 9783540539438 / Angielski / Miękka / 1991 / 113 str.

Hans Grabowski; Reiner Anderl; Michael J. Pratt

Opis

Reiner Anderl The Advanced Modelling part of the CAD*I project aimed at the development of a new generation of modelling techniques as a basic functionality of future CAD/CAM systems. The methodology and concepts for advanced modelling techniques, their availability in the communication interface of a CAD/CAM system and their influence on internal interfaces in the software architecture of a CAD/CAM system are fundamental results of advanced modelling work. These results form the basis for the development of a new generation of CAD/CAM systems which are called product modelling systems. CAD/CAM systems today mainly support the geometric description of a technical part or its description as a technical drawing. Advanced geometric modelling capabilities deal with parametric design functions embedded into CAD/CAM systems. However, development strategies for future CAD/CAM systems are directed toward the following: 1. The development of product modelling systems and 2. the development of integrated systems based on CAD, CAP (Computer Aided Planning), CAM and other CIM (Computer Integrated Manu facturing) functionalities."

Spis treści

CAD*I Project Overview.- 1. Introduction.- 2. Methodology of Design.- 2.1 General Problem Solving Principles.- 2.2 Derivation of the Model Space of Design.- 3. Overview of the Concept for Advanced Modelling.- 3.1 The Integrated Product Model.- 3.2 Modelling Levels.- 3.3 General Principles of Associative Modelling.- 4. Geometric-Associative Modelling.- 4.1 Subject of Specification.- 4.2 Geometric-Associative Modelling Approaches.- 4.2.1 Constructive Approaches.- 4.2.2 Language Approaches.- 4.2.3 Rule Based Approaches.- 4.3 System Specification of the “Handsketch” Input System (HIS).- 4.3.1 The Recognition Process.- 4.3.2 The Rule Base.- 4.3.3 Architecture of the System for the “Handsketch” Input System.- 5. Technical-Associative Modelling.- 5.1 State of the Art.- 5.1.1 Language Base Approaches.- 5.1.2 Constructive Approaches.- 5.1.3 Other Approaches.- 5.2 The DTT-Modeller (Design by Technical Terms).- 5.2.1 Sectional Surfaces.- 5.2.2 Technical Associativities.- 5.2.3 Form Features and Parts.- 5.2.4 Assemblies and Products.- 5.3 Command Language for Design.- 5.3.1 Command Syntax.- 5.3.2 Technical Modelling Language.- 5.3.3 Technical Associativities.- 6. Design by Features.- 7. Internal Interfaces.- 7.1 The Model Manipulation Interface.- 7.1.1 Examples of the HLMMI.- 7.1.2 Programming with the HLMMI.- 7.2 Geometric Associative Interface (GAI).- 7.3 Technical Modelling Interface.- References.