STEP for Multi-Disciplinary Model Management: “Intelligent PDM”

1. STEPfor Multi-DisciplinaryModel Management:“Intelligent PDM” Stephen C. Waterbury NASA/Goddard Space Flight Center Presentation for the ESA/NASA Video/Teleconference “STEP for Aerospace Applications” July 16, 1999

2. 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

3. Without PDM, CAx Models are “Islands”Models Are Isolated Within Disciplines Mechanical(MCAD) Analysis(CAE) Electronic(ECAD) SystemsEngineering Tools Discipline- Specific Model Databases Item XMCAD Item XCAE Item XECAD Item XSE Item YMCAD Item YCAE Item YECAD Item YSE

4. Item Y Models Item X Models Item YMCAD Item XMCAD Item XSE Item YSE Item YCAE Item XCAE Item YECAD Item XECAD Current Product Data Management (PDM):Models Can Be Associated But Not Integrated Mechanical(MCAD) Analysis(CAE) Electronic(ECAD) SystemsEngineering Tools PDM System

5. “Intelligent PDM” (IPDM):Master Models Integrate Discipline Models Mechanical(MCAD) Analysis(CAE) Electronic(ECAD) SystemsEngineering Tools Models (Discipline Views) AP 203 AP 209 AP 210 AP 233 STEP AP's NASA Discipline View Mappings STEP Testbed Integrated Master Models Instrument Y Master Model Spacecraft X Master Model

6. Plug-and-Play IPDM:CORBA PDM Enablers Object Interfaces Mechanical(MCAD) Analysis(CAE) Electronic(ECAD) SystemsEngineering CORBA- EnabledTool IIOP AP 203 AP 209 AP 210 AP 233 Instrument Y Object Discipline Model Mappings Integrated Master Models Spacecraft X Master Model Instrument Y Master Model NASA STEP Testbed

7. Pre-Phase A Phase A/B Phase C/D IntegratedMission Proposal Prototypingand Analysis Detailed Design,Build, and Test Mission Parameters Mission Parameters Mission Parameters Requirements Requirements Requirements Functional Model Functional Design Functional Design Behavioral Design Behavioral Model Interface Control Docs Preliminary Components Physical Model Physical Design/Arch. The Product Master Model: Progressive Population of Model Over the Mission Life Cycle

8. 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

9. Initial IPDM Capabilities:NASA 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 NASA’s 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.

10. For More Info: STEP/OMG URL’s! • STEP On-Line Information Service (SOLIS) -- http://www.nist.gov/sc4 • Expresso for 95/NT (freedownload) -- 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/step_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/step/step.html • The OMG Manufacturing Domain Task Force (MfgDTF): PDM Enablers, etc. --http://www.omg.org/homepages/mfg

11. 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 • Wireframe with Topology • Surfaces and Wireframe without • Topology • Specifications • Surface Finish • Material • Design • Process • CAD Filename • Product Structure • Assemblies • Bill of Materials • Part • Substitute Part • Alternate Part

12. Information Shared Between Analysis & Design • 3D Shape Representations • Composite Constituents • Material Specifications & Properties • Part Definitions • Analysis Discipline Product Definitions • Finite Element Analysis • Model (Nodes, Elements, Properties,...) • Controls (Loads, Boundary Constraints,...) • Results (Displacements, Stresses,...) • Analysis Report • Composite Constituents • Ply Boundaries, Surfaces • Laminate Stacking Tables • Reinforcement Orientation • Design Discipline Product Definition • Shape Representations • Assemblies • Configuration Control, Approvals • Part, product definitions • Finite element analysis model, controls, and results • Material Specifications & Properties • Composites • Homogeneous (metallics) • 3D Shape Representation • AP202/203 Commonality Plus Composite Specific 3D Shapes • Advanced B-Representation • Facetted B-Representation • Manifold Surfaces With Topology • Wireframe & Surface without Topology • Wireframe Geometry with Topology • Composite Constituent Shape Representation AP 209: Composite & Metallic Analysis & Related Design

13. Part • Functionality • Termination • Shape 2D, 3D • Single Level Decomposition • Material Product • Characteristics Configuration Mgmt • Identification • Authority • Effectivity • Control • Requirement Traceability • Analytical Model • Document References AP 210: Electronic Assembly, Interconnect, and Packaging Design Product Structure/Connectivity • Functional • Packaged Physical • Component Placement • Bare Board Geometry • Layout items • Layers non-planar, • conductive & non-conductive • Material product Geometry • Geometrically Bounded • 2-D Shape • Wireframe with Topology • Advanced BREP Solids • Constructive Solid Geometry Requirements • Design • Allocation • Constraints • Interface Technology • Fabrication Design Rules • Product Design Rules