STEP for MultiDisciplinary Model Management: Intelligent PDM

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STEPfor Multi-DisciplinaryModel
ManagementIntelligent PDM

• Stephen C. Waterbury
• NASA/Goddard Space Flight Center

Presentation for the ESA/NASA Video/Teleconferen
ce STEP for Aerospace Applications July 16, 19
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The Product Master Model

• The Product Master Model is a integrated global
  model of the totality of information contained in
  all engineering discipline view-models of the
  product
• Mechanical design (MCAD)
• Electronic design (ECAD)
• Analysis (CAE) -- all types
• Systems (requirements, behavior, function,
  rules)
  
• Simulation
• Visualization
• STEP Application Protocols provide the basis for
  a Product Master Model

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Without PDM, CAx Models are IslandsModels Are
Isolated Within Disciplines
Analysis(CAE)
Electronic(ECAD)
SystemsEngineering
Mechanical(MCAD)
Item XMCAD
Item XCAE
Item XECAD
Item XSE
Item YMCAD
Item YCAE
Item YECAD
Item YSE
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Current Product Data Management (PDM)Models Can
Be Associated But Not Integrated
Analysis(CAE)
Electronic(ECAD)
SystemsEngineering
Mechanical(MCAD)
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Intelligent PDM (IPDM)Master Models Integrate
Discipline Models
Analysis(CAE)
Electronic(ECAD)
SystemsEngineering
Mechanical(MCAD)
AP 233
AP 210
AP 209
AP 203
Discipline View Mappings
Integrated Master Models
Instrument Y Master Model
Spacecraft X Master Model
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Plug-and-Play IPDMCORBA PDM Enablers Object
Interfaces
Analysis(CAE)
Electronic(ECAD)
SystemsEngineering
Mechanical(MCAD)
CORBA- EnabledTool
AP 233
AP 210
AP 209
AP 203
Instrument Y Object
Discipline Model Mappings
Integrated Master Models
Spacecraft X Master Model
Instrument Y Master Model
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The Product Master Model Progressive Population
of Model Over the Mission Life Cycle
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Product Master Model-Enabled Capabilities

• Intelligent Product Data Management
• Features
• Integration of heterogeneous, multi-disciplinary
  models into a progressively and continuously
  defined Master Model
  
• Algorithmic generation of discipline-specific
  view-models (where possible) on demand
  
• Interdisciplinary tool object services (e.g.,
  live linkage of design features between CAD and
  analysis models)
  
• Integration persistence of global product model
  knowledge
  
• Integrated Model-based Systems Engineering
• Features
• Master Model explicitly identifies and maintains
  discipline model interdependencies
  
• Can provide immediate feedback on change impacts
• Supports cross-disciplinary view of requirements,
  function allocation, and behavior

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Initial IPDM CapabilitiesNASA STEP Testbed FY99
Plans

• Initial PDM Enablers (PDME) interfaces
  (CORBA/IIOP access)
  
• Check-in/out via PDME (or via file upload thru
  Web browser) of STEP models/files
  
• User-specified project/system/subsystem
  hierarchy
  
• Standardization of a NASA Systems Engineering
  Information Model
  
• Harmonization of Mission Design Parameters among
  NASAs Integrated Design Centers
  
• Mapping of harmonized parameters to
  STEP AP 233 (Systems Engineering)
  
• Prototyping of MCAD/ECAD/CAE model integration
  and sharing
  
• The NASA STEP Testbed is collaborating with
  Boeing, IBM, and Delco-Delphi in the PDES, Inc.
  Electromechanical Pilot
  
• The PDES, Inc. Electromechanical Pilot Project
  is implementing MCAD/ECAD model exchange using
  STEP AP 203 and AP 210.

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For More Info STEP/OMG URLs!

• STEP On-Line Information Service (SOLIS) --
  http//www.nist.gov/sc4
  
• Expresso for 95/NT (free download) --
  http//www.nist.gov/expresso
  
• Note if interested in the server (Unix) version
  of Expresso, contact Steve Waterbury
  
• STEP On A Page (a capsule summary and current
  status of STEP) -- http//pdesinc.aticorp.org/st
  ep_on_a_page.ppt
  
• PDES, Inc. a government-industry consortium
  implementing STEP --http//pdesinc.scra.org
  
• USPRO (U.S. Product Data Association),
  distributor for STEP documents --http//www.uspro
  .org
  
• NASA STEP Central the main NASA site for STEP
  information --http//misspiggy.gsfc.nasa.gov/step
  
  
• The NASA STEP Testbed STEP/OMG infrastructure
  pilot project --http//misspiggy.gsfc.nasa.gov/st
  ep/step.html
  
• The OMG Manufacturing Domain Task Force (MfgDTF)
  PDM Enablers, etc. --http//www.omg.org/homepage
  s/mfg

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AP 203 Configuration Controlled 3D Designs of
Mechanical Parts and Assemblies
Configuration Management Authorization Control
(Version/Revision) Effectivity Release Status
Security Classification Supplier
Geometric Shapes Advanced BREP Solids Faceted
BREP Solids Manifold Surfaces with Topology Wi
reframe with Topology Surfaces and Wireframe wit
hout Topology
Specifications Surface Finish Material Desig
n
Process CAD Filename
Product Structure Assemblies Bill of Materials

Part Substitute Part Alternate Part
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AP 209 Composite Metallic Analysis Related
Design
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AP 210 Electronic Assembly, Interconnect, and
Packaging Design
Product Structure/Connectivity
Functional Packaged
Physical
Component Placement Bare Board Geometry La
yout items Layers non-planar, conductive
non-conductive
Material product
Geometry
Geometrically Bounded 2-D Shape Wireframe
with Topology Advanced BREP Solids Cons
tructive Solid Geometry
Requirements
Design Allocation Constraints Interface
Technology
Fabrication Design Rules Product Design Rules