Download - EDU DeKoning
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7/30/2019 EDU DeKoning
1/15
FENET THEMATIC NETWORK
COMPETITIVE AND SUSTAINABLE GROWTH
(GROWTH) PROGRAMME
FENET Technology Workshops13-14 J une 2002, Zurich, Switzerland
Industry Sector RTD Thematic Area Date
Aerospace Education and dissemination 14-J un-02
Space industry perspective on integration of CAD and CAE
[email protected] Space Agency
ESTEC / Mechanical Engineering Department
Thermal and Structures Division
Noordwijk, The Netherlands
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7/30/2019 EDU DeKoning
2/15
FENET THEMATIC NETWORK
COMPETITIVE AND SUSTAINABLE GROWTH
(GROWTH) PROGRAMME
FENET Technology Workshops13-14 J une 2002, Zurich, Switzerland
Objectives of this presentation
To outline the context in which integration of CAD and CAE takes place
or should take place To give an assessment of the state of practice in space industry
To identify themes for the upcoming FENET Workshop, December 2002 in Prague"Integration Issues for Engineering Analysis Tools & Methods",subtitled: "Including CAD-FEM Data Transfer and Re-use Issues"
To give some examples of what is being done about it in space industry by ESA
NOTE: The field is so wide that this presentation should not be considered as a finalcomprehensive study of the the CAD/CAE integration issues in space industry, butrather as an attempt to highlight a number of the main issues and achievements.
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7/30/2019 EDU DeKoning
3/15
FENET THEMATIC NETWORK
COMPETITIVE AND SUSTAINABLE GROWTH
(GROWTH) PROGRAMME
FENET Technology Workshops13-14 J une 2002, Zurich, Switzerland
Why integration of CAD and CAE (engineering analysis)?
To develop a product more efficiently and more effectively
To enable collaborative and concurrent engineering A lot of common data:
Product structure and configuration
hierarchical breakdown
identification of items / parts Basic geometry: main shapes and placement
Materials and material properties
To avoid duplication of work and to minimise inconsistencies
Define geometry and topology once and as much as possible in one place Reuse material assignments across analyses in multiple disciplines
Enable propagation of changes in controlled (semi-)automated manner
To maximise engineer-hours spent on genuine engineering analysis, as opposed to
tedious and error prone data conversion
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7/30/2019 EDU DeKoning
4/15
FENET THEMATIC NETWORK
COMPETITIVE AND SUSTAINABLE GROWTH
(GROWTH) PROGRAMME
FENET Technology Workshops13-14 J une 2002, Zurich, Switzerland
State of practice in space industry (1/2)
Many engineering disciplines involved
System engineering, including: Requirement engineering
Risk assessment
Cost analysis
Mission analysis
Mechanical engineering Structural engineering
Thermal engineering
Electrical engineering
Optical engineering
Fluid dynamics engineering
Software engineering
Chemical engineering
Biological engineering
Human factors engineering
Many subsystems involved
Attitude and orbit control Electrical power
Propulsion
Mechanisms, pyros, robotics
Communications
Command and data handling
Instruments & sensors
Life support
Assembly and integration tools
Test facilities and equipment
Ground systems & operations
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7/30/2019 EDU DeKoning
5/15
FENET THEMATIC NETWORK
COMPETITIVE AND SUSTAINABLE GROWTH
(GROWTH) PROGRAMME
FENET Technology Workshops13-14 J une 2002, Zurich, Switzerland
State of practice in space industry (2/2)
Regular transfer from CAD to structural FEA
Number of COTS pre-processors / meshers in use:e.g. MSC-PATRAN, EDS I-DEAS, EDS FEMAP, ANSYS
Regular transfer from CAD to CFD codes (COTS and proprietary)
Some transfer from CAD to thermal CAE (mostly proprietary or semi-commercial)
Some integration of analysis model management into PDM initiated Limited use of FEA capabilities inside CAD tools
Some (pilot?) use of CAD quality assessment / enhancement tools
e.g. Transcendata CADIQ, Theorem Solutions CADVerter
Little integration of MCAD and ECAD (e.g. for avionics boxes) Most integration scenarios limited to within one organisation
Not integrated in system engineering approach yet
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7/30/2019 EDU DeKoning
6/15
FENET THEMATIC NETWORK
COMPETITIVE AND SUSTAINABLE GROWTH
(GROWTH) PROGRAMME
FENET Technology Workshops13-14 J une 2002, Zurich, Switzerland
Need to integrate with Product Data Management and System Engineering
Integrated development process must take whole product life cycle into account
In order to cope with the inherent complexity of space product developmentthe integrated development process needs:
a PDM function to stay in control of configurations, versions, change, releasestatus and to enable collaboration
a System Engineering (SE) approach to coordinate and ensure consistencybetween disciplines and subsystems, to maintain oversight and to enableoptimisation at system level
Issue: Current CAE tools hardly provide hooks for PDM and SE (meta-)data
CAE models and results are mostly managed as BLOBs,
possibly with some file naming convention and a timestamp
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7/30/2019 EDU DeKoning
7/15
FENET THEMATIC NETWORK
COMPETITIVE AND SUSTAINABLE GROWTH
(GROWTH) PROGRAMME
FENET Technology Workshops13-14 J une 2002, Zurich, Switzerland
Issues with transfer / re-use of CAD geometry for analysis
Quality of CAD geometry not good enough for meshers
E.g. small overlaps, gaps, slivers, numerical inaccuracy for points/vertices CAD model needs to be cleaned and/or mesher enhanced
CAD model needs to be designed-for-analysis
I.e. feature or detail suppressing is feasible without too much hassle
In general this means a top-down CSG-like design approach
This may not be the typical, preferred way of working of the CAD engineer
CAD engineer needs to be trained to become analysis-aware
CAE models derived from CAD will in general contain more detail / elements / nodes
CAE tools need to be able to handle the larger numbers
Analysts need more capable pre- and post-processing tools Analysts need to be trained to communicate better with CAD engineers
Some model idealisation algorithms are available but need to be much improved
Different idealisations needed for different engineering analyses
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7/30/2019 EDU DeKoning
8/15
FENET THEMATIC NETWORK
COMPETITIVE AND SUSTAINABLE GROWTH
(GROWTH) PROGRAMME
FENET Technology Workshops13-14 J une 2002, Zurich, Switzerland
Data flow in integrated CAD / CAE process related to life cycle stage
During initial / conceptual / preliminary design & analysis-for-design
Sketches / rough configurations from CAD to CAE Shape definition more from CAE to CAD
During detailed design & analysis-for-verification
Detailed 3D models from CAD to CAE
From CAD to CAE works (reasonably) well From CAE to CAD not so mature or only just starting
CADPre-
ProcessorCAE
SolverPost-
Processor
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7/30/2019 EDU DeKoning
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FENET THEMATIC NETWORK
COMPETITIVE AND SUSTAINABLE GROWTH
(GROWTH) PROGRAMME
FENET Technology Workshops13-14 J une 2002, Zurich, Switzerland
Need for open data exchange standards
Requirement to support complete product life cycle in integrated process
Life cycle can be 5 30 or more years, much longer than software tool lifetime Space products are always developed by large international teams
Inherently standardisation on one tool(set) is impossible
Therefore the integrated process architecture shall not depend on any specific tools or
tool-specific data formats Only way out is creation and use of reliable open data exchange standards
For file based exchange
For database access
For programming interfaces Open source software development model provides very effective means to promote
the efficient and reliable implemention of open data exchange standards
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7/30/2019 EDU DeKoning
10/15
FENET THEMATIC NETWORK
COMPETITIVE AND SUSTAINABLE GROWTH
(GROWTH) PROGRAMME
FENET Technology Workshops13-14 J une 2002, Zurich, Switzerland
What is ESA doing (1/3) ECSS E-10-07 "Exchange of Product Data"
"European Cooperation for Space Standardization" www.ecss.nl
High level umbrella standard specifying clauses in following format:To exchange data from a representationto a representationfor transferring the standard shall be used.
Addresses all (useful) combinations of all ECSS disciplines
Tailorable list of clauses for use in specific space projects
Refers mainly to ISO 10303, STEP-based, XML-based standards
Similar approach in NASA-STD-2817 (for MCAD / MCAE)
"Computer-Aided Engineering, Design and Manufacturing Data Interchange Standards"Regular contacts with NASA PDE Working Group
Currently completing the WG Draft WG identifying gaps
Start of public review foreseen in 2002-Q3
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7/30/2019 EDU DeKoning
11/15
FENET THEMATIC NETWORK
COMPETITIVE AND SUSTAINABLE GROWTH
(GROWTH) PROGRAMME
FENET Technology Workshops13-14 J une 2002, Zurich, Switzerland
What is ESA doing (2/3) NASA-ESA Aerospace PDE Workshop
3rd Workshop held April 9-12, 2002 at ESTEC
63 participants many leading experts in STEP and XML developments
All presentations and many further links available from website:http://www.estec.esa.int/conferences/aerospace-pde-2002
Annual workshop alternating between US and EuropeNext: April 2003 organised by NASA at NIST (near Washington DC)
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7/30/2019 EDU DeKoning
12/15
FENET THEMATIC NETWORK
COMPETITIVE AND SUSTAINABLE GROWTH
(GROWTH) PROGRAMME
FENET Technology Workshops13-14 J une 2002, Zurich, Switzerland
What is ESA doing (3/3) STEP-TAS & STEP AP203 to thermal CAE
ESA developed STEP-TAS (Thermal Analysis for Space) protocol and promoted
implementation in all space thermal analysis tools (together with NASA) STEP-TAS Software Development Kit provided at nominal cost
ESA coordinated/funded heuristic filter to recover as much as possible primitive shapesfrom STEP AP203 CAD export (cylinders, discs, rectangles, spheres, )
If no primitive can be recovered then emit original NURBS shape First implementation tested with Catia v4 and ESARAD
ESARAD thermal-radiative raytracing solver enhanced to support NURBS faces
Will be made available free of charge
Future developments
More open PDE standards (o.a. for space environmental effects)
More filters with open standard input and output
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7/30/2019 EDU DeKoning
13/15
FENET THEMATIC NETWORK
COMPETITIVE AND SUSTAINABLE GROWTH
(GROWTH) PROGRAMME
FENET Technology Workshops13-14 J une 2002, Zurich, Switzerland
Overview relevant open standards (1/2)
ISO 10303 / STEP
9 Part 11: EXPRESS data modelling language
9 Part 21: Physical file
9 Parts 22,23,24,26: C, C++, Java Programming I/Fs
9 Part 28: Link with XML and XMI data transfer
9 Parts 4x: Generic Resources: product structure, geometry, topology,
9 Parts 5x: Basic blocks engineering analysis: mathematical spaces, functions,
structured/unstructured meshings, properties, results data,
9 PDM schema
9 AP203: PDM + 3D explicit shapes
9 AP209: FE analysis
9 AP210: Electronic assemblies (avionics, PCBs, )
9 AP212: Electro-technical (harnesses, )
9 AP214: Automotive (AP203 + CSG, kinematics, )
9 AP221: Process plant (registries, STEPLib, multi-language)
9 AP232: Technical data packages
9 AP233: Systems engineering
9 AP237: CFD data
ISO 13584 / PLIB
9 STEP-compatible parts libraries
STEP-based standards (ESA developed)
9 STEP-TAS: Thermal Analysis for Space
9 STEP-NRF: Network-model Results Format
Basic ISO standards
9 ISO 31 & 1000: Quantities and units, SI
9 ISO 8879 SGML: Standard Generalized Markup
Language
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7/30/2019 EDU DeKoning
14/15
FENET THEMATIC NETWORK
COMPETITIVE AND SUSTAINABLE GROWTH
(GROWTH) PROGRAMME
FENET Technology Workshops13-14 J une 2002, Zurich, Switzerland
Overview relevant open standards (2/2)
IETF
9 LDAP: Lightweight Directory Access Protocol
W3C standards
9 HTTP and URI/URL
9 HTML & XHTML
9 XML: eXtensible Markup Language
9 MathML: Mathematical Markup Language
9 XSL & XSLT & XPath: eXtensible Stylesheet Language
and XSL Transformations & Path
9 XML-Schema9 RDF: Resource Description Framework
Semantic Web
9 DOM: Domain Object Model
9 SOAP: Simple Object Access Protocol
Web Services based on HTTP and XML
9 PNG: Portable Network Graphics9 SVG: Scalable Vector Graphics
OMG standards
9 UML: Information System Modelling
9 CORBA: OO Distributed Processing
9 MDA: Model Driven Architecture
9 XMI: XML Metadata Interchange
9 MDTF: Manufacturing Domain Task Force
Web 3D Consortium
9 VRML: Virtual Reality Modeling Language
ISO/IEC 14772
Public domain standards
9 HDF: Hierarchical Data Format (NCSA)
9 NetCDF: Network Common Data Form (UCAR)
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7/30/2019 EDU DeKoning
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FENET THEMATIC NETWORK
COMPETITIVE AND SUSTAINABLE GROWTH
(GROWTH) PROGRAMME
FENET Technology Workshops13-14 J une 2002, Zurich, Switzerland
Open standards based integration between discipl ines (When? ;-)
System Engineering & PDMSystem Engineering & PDM
ERP & Integrated Logistics SupportERP & Integrated Logistics Support
CADCAD
CAE&Sim.
S
tructural
S
tructural
Thermal
T
hermal
......
E
lectrical
E
lectrical
Manufacturing
AssemblyIntegration
Test
Manufacturing
AssemblyIntegration
TestOpera-tional
support
Opera-tional
support
AP232
TDP
STEP-TAS AP210/AP212
AP203/AP209
AP203 CC4
STEP-NRF
PDM
schemaAP203
AP214
AP203 CC1AP203 CC1 PDM schema
PDM schemaAP203 CC1
AP203