Lecture and laboratory No. 13 Product data management and exchange Óbuda University John von Neumann Faculty of Informatics Institute of Applied Mathematics Master in Engineering Informatics Course Modeling and design Dr. László Horváth

László Horváth UÓ-JNFI-IAM The screen shots in tis presentation was made in the CATIA V5 and V6 PLM systems the Laboratory of Intelligent Engineering systems, in real modeling process. This presentation is intellectual property. It is available only for students in my courses. The CATIA V5 és V6 PLM systems operate in the above laboratory by the help of Dassult Systémes Inc. and CAD-Terv Ltd.

Content Laboratory task MD 13 Survey and summary of modeling in the course (See elaborated modeling tasks in materials for previous laboratories.) Lecture Product data management. Characteristics of data in engineering virtual space. Engineering modeling specific data base management functions. Product structure. Product model standard. Data exchange between modeling systems. Development of data exchange standards. Initial Graphics Exchange Specification. László Horváth UÓ-JNFI-IAM

Product data management (PDM) Characteristics Product centric database management. Integrated in modeling environments. Management of product structure and its connections with the related items. Widespread, high complexity, and huge amount of data are to be managed. Coordinated management of design data and engineering processes. In integration with other company activities. It is available for lifecycle of product. Effective tool for the reveal of engineering information related problems. Functions Information handling. Change management. Process control. Product structure handling Considerations at product data configuration Company management objectives. Product. Company organization. Human factor: motivation, experience, former fails, quality. László Horváth UÓ-JNFI-IAM

Characteristics of data in engineering virtual space Configurable products, high number variants. Modeling of products in groups. Modeling generic product structures. Huge amount of data. High number of principles, formats. Complex system of relationships. Various positions and roles of users. Developing maturity: in work, in analysis, ready design, in installation, in maintenance, in operation. For lifecycle of product (PLM). László Horváth UÓ-JNFI-IAM

General Engineering modeling specific data base management functions Multiple simultaneous access Acceptance procedures Change management Integrity of data base Open system Status reports Access from user programs Various standards Access from external data bases Interfaces to other systems High number of platforms Product related Projects Groups Product structure History of model construction Relationships of objects László Horváth UÓ-JNFI-IAM

Product structure Connection with modeling tools. Revisions, alternatives, variants, and options. Multilevel bill of materials, BOM). Generation of specific views for groups. Graphic supported navigation in multilevel systems. Attributes: connection with parts and units, and related data. Transfer to other modifications. Relationships: part-part, part-data, one-several, several-several, tracking and inheritance of attributes, taxonomy. László Horváth UÓ-JNFI-IAM

Data exchange between modeling systems Direct data exchange Neutral format Indirect data exchange Data base A1Data base A2 Direct conversion Data base A1Data base A2 Data exchange without conversion Data base A1 standardized Exchange between standardized data bases Data base A1Data base A2 Data exchange with associative connection Data base A1 Data base A2 Conversion to neutral format Conversion to format of data base 2 Data exchange in standard format László Horváth UÓ-JNFI-IAM

Development of data exchange standards IGES 1.0IGES 2.0IGES 3.0 IGES 4.0IGES 5.0 ANSI Y14.26 ISO STEP DIN VDA/FS 1.0 VDA/FS 2.0 PDES project ESPIRIT CAM-I XBF-2 ESP László Horváth UÓ-JNFI-IAM

Initial Graphics Exchange Specification IGES - Initial Graphics Exchange Specification. Development started in Former neutral format standards at Boeing and General Electric companies was substantial effect. ANSI (American National Standard Institute accepted and adapted the IGES as ANSI Y14.26M in Wide support of the engineering drawing capable IGES 1.0 and 2.0 by engineering system developers. The IGES 4.0 and 5.0 variants was developed for B-rep solid models. IGES standard was included in the STEP product model standard. The IGES file is a sequence of entities with parameters. Relationship entities are available. The IGES file includes geometrical, topological and non-geometric data. User definition of special entities is available. László Horváth UÓ-JNFI-IAM

Examples for IGES entities Annotation entities Geometric entities 124 transformation matrix 136 finite element 132 connection point 108 plane 114 parametric spline 122 tabulated cylinder 128 NURBS 140 offset surface 144 trimmed parametric surface 102 complex curve 110 line 112 parametric spline 126 NURBS 100 arc 158 sphere 154 cylinder 156 cone 184 solid assembly 502 vertex 504 edge 508 loop 510 face 514 shell Structure entities 302 associativity definition 402 asszociativíty instance 412 rectangular array 418 node information 202 angle 206 diameter 216 length 220 dimension for point Curves Solids Others Surfaces IGES entities László Horváth UÓ-JNFI-IAM

IGES MACRO Definition Concentric circles: 306 MACRO,603, XC,YC,ZC,R,N Parallel lines: 306 MACRO,609, X1,Y1,Z1,X2,Y2,Z2,D,N Instances 603 1,1,1,3, ,2,8,9, ,1,1,2,2,1,1, ,6,8,12,15,6,2,8 László Horváth UÓ-JNFI-IAM

Tests for IGES processor Transmission test Model IGES file Transfer to target side Model Reflection test Source side preprocessing Model Source side postprocessing IGES file László Horváth UÓ-JNFI-IAM Source side preprocessing Target side postprocessing

Loopback test Model IGES file Transfer to target side Model Transfer to source side IGES file László Horváth UÓ-JNFI-IAM Tests for IGES processor Source side preprocessing Source side postprocessing Target side postprocessing Target side preprocessing

Product model standard STEP (Standard for Exchange of Product Model Data). International data communication standard for modeling and data exchange of products. In coordination with former data exchange standards (E.g. IGES). STEP involves numerous former data exchange standards. For mechanical, electrical, electronic, and structural design. Grounded by the PDES project for development of product models. Unified model representation of product model related information. 1994: Europe and USA concerns: implementation and application of STEP as international product data exchange standard. The STEP standard was registered as ISO in László Horváth UÓ-JNFI-IAM

The STEP product model (original scenario) Entities in EXPRESS language Application independent Application specific entities From entities of generic resources Cite generic resources Entities are cross-referenced Generic data structures are defined STEP entities Product data in EXPRESS language Implementation of STEP Integrated Resources Application Resources Engineering drawing Electric Finite element analysis Kinematic Generic Resources Product definition Geometry and topology Represenattion Product structure Tolerance Materials Form features Presentation Processesk Application protocols (AP) Implementation procedures Physical fileStandard data access interface Data baseKnowledge base Drawing) Associative drawing Mechanical design Ship building Tube network Electrical design AP Configuration- Controlled 3D Design Geometry, product structure and configuration management. AP Core Data for Automotive Mechanical Design Automotive industry oriented geometry, product structure, form features, materials, and tolerances. László Horváth UÓ-JNFI-IAM

STEP application protocols (AP) The STEP give a set of generic definitions which are applicable in different APs. These are Application Integrated Constructs. Product data in an AP can be shared between different design systems. This can demands elaboration of interfaces for several systems and providing tools for integration of partial data to complete data exchange data. The STEP part 21 defines EXPRESS sourced data exchange file format. The STEP AP is a formal document which describes: Activities during lifecycle of product on the basis of AAM - Application Activity Model, Product information which is necessary for activities: ARM - Application Reference Model and formals EXPRESS information model AIM (Application Interpreted Model) Combination of information models and relevant constraints. László Horváth UÓ-JNFI-IAM

STEP AP: AIM - Application Interpreted Model The AIM serves as basic of data exchange implementation. EXPRESS information model. It contains same information as ARM: structures and constraints. Basic Application Objects (AO ) are described using the library of existing definitions (generic and integrated resources). AO - Application Object The AO is divided into Units of Functionality (UOF). The UOF gives logically complete information subset about one of the aspects of product. For example, Design Activity Control UOF serves tracking of modifications during the full lifecycle of product in the AP 203. In this case AO for example requirement for modification. The AP 203 iicludes 36 AOs in these UOFs: Authorization, BOM, Design Information, Effectivity, End Item Identification, Part Identification, Shape, Source Control.

MD 13 laboratory exercise László Horváth UÓ-JNFI-IAM Survey and summary of modeling in the course (See elaborated modeling tasks in materials for previous laboratories.)