STEP STEP and and Intelligent Product Data Intelligent Product Data Management Management Stephen C. Waterbury NASA/Goddard Space Flight Center Excerpt from a Presentation for the ISE Team on May 3, 1999
Contents Contents Key Acronyms and Definitions G Some STEP Application Protocols: G – AP 203: “Configuration-Controlled 3D Design” (MCAD) – AP 209: “Composite and Metallic Analysis and Related Design” (CAE) – AP 210: “Electronic Assembly, Interconnect., and Packaging Design” (ECAD) Without PDM, CAx Models are “Islands” G Current COTS PDM: Association, not Integration G “Intelligent PDM” (IPDM) G Plug-and-Play IPDM (with CORBA / OMG PDM Enablers Interfaces) G Product Master Model Evolution Over the Life Cycle G Benefits of a STEP-based IPDM Service G The NASA STEP Testbed IPDM Pilot G For more info: STEP/OMG URL’s! G
Key Acronyms and Definitions Key Acronyms and Definitions G CAx: CAD/CAM/CAE, etc. – Engineering software for the modeling of a product in any life cycle phase. E.g.: Mechanical Computer-Aided Design (MCAD), Electrical Computer-Aided Design (ECAD), Manufacturing (CAM), Analysis/Simulation (CAE), etc. G PDM: Product Data Management – Systematic maintenance, storage, tracking, and access to all information about a product throughout its lifecycle, including concepts, plans, documents, specifications, drawings, engineering and analysis models, manufacturing process information, testing information, etc. Configuration Management (CM) is a subset of PDM.
STEP AP 203: Configuration Controlled 3D 203: Configuration Controlled 3D STEP AP Designs of Mechanical Parts and Assemblies Designs of Mechanical Parts and Assemblies Configuration Management Geometric Shapes • Authorization • Advanced BREP Solids • Control(Version/Revision) • Faceted BREP Solids • Effectivity • Manifold Surfaces with Topology • Release Status • Wireframe with Topology • Security Classification • Surfaces and Wireframe without • Supplier Topology Specifications Product Structure • Surface Finish • Assemblies • Material • Bill of Materials • Design • Part • Process • Substitute Part • CAD Filename • Alternate Part
STEP AP 209: Composite & 209: Composite & STEP AP Metallic Analysis & Related Design Metallic Analysis & Related Design Information Shared Between Analysis Analysis Discipline Product & Design Definitions • 3D Shape Representations • Finite Element Analysis – Model (Nodes, Elements, Properties,...) • Composite Constituents – Controls (Loads, Boundary Constraints,...) • Material Specifications & Properties – Results (Displacements, Stresses,...) • Analysis Report • Part Definitions Composite Constituents Design Discipline Product Definition • Ply Boundaries, Surfaces • Shape Representations • Laminate Stacking Tables • Assemblies • Reinforcement Orientation Configuration Control, Approvals Material Specifications & 3D Shape Representation Properties • Part, product definitions • AP202/203 Commonality Plus • Composites • Finite element analysis model, Composite Specific 3D Shapes controls, and results • Homogeneous (metallics) – Advanced B-Representation – Facetted B-Representation – Manifold Surfaces With Topology – Wireframe & Surface without Topology – Wireframe Geometry with Topology – Composite Constituent Shape Representation
STEP AP 210: Electronic Assembly, 210: Electronic Assembly, STEP AP Interconnect, and Packaging Design Interconnect, and Packaging Design Part Product Structure/ • Functionality Connectivity • Termination • Functional • Shape 2D, 3D Physical • Packaged • Single Level Decomposition • Component Placement • Material Product • Bare Board Geometry • Characteristics • Layout items • Layers non-planar, Configuration Mgmt conductive & non-conductive • Material product • Identification • Authority Geometry • Effectivity • Geometrically Bounded • Control 2-D Shape • Requirement Traceability • Wireframe with Topology • Analytical Model • Advanced BREP Solids • Document References • Constructive Solid Geometry Requirements • Design Technology • Allocation • Fabrication Design Rules • Constraints • Product Design Rules • Interface
Without PDM, CAx Models are “Islands” Without PDM, CAx Models are “Islands” Models Are Isolated Within Disciplines Models Are Isolated Within Disciplines Mechanical Analysis Electronic Systems (MCAD) (CAE) (ECAD) Engineering Item X Item X Item X Item X MCAD CAE ECAD SE Item Y Item Y Item Y Item Y MCAD CAE ECAD SE
Current Product Data Management (PDM): Current Product Data Management (PDM): Models Can Be Associated Associated But Not But Not Integrated Integrated Models Can Be Mechanical Analysis Electronic Systems (MCAD) (CAE) (ECAD) Engineering Item X Item Y Item X Item Y Models Models MCAD MCAD Item X Item Y Item X Item Y SE SE Item X Item Y CAE CAE ECAD ECAD
“Intelligent PDM” (IPDM): “Intelligent PDM” (IPDM): Master Models Integrate Discipline Models Master Models Integrate Discipline Models Mechanical Analysis Electronic Systems (MCAD) (CAE) (ECAD) Engineering AP 203 AP 209 AP 210 AP 233 Discipline View Mappings Integrated Instrument Y Spacecraft X Master Models Master Model Master Model
Plug-and-Play IPDM: Plug-and-Play IPDM: CORBA PDM Enablers PDM Enablers Object Interfaces Object Interfaces CORBA CORBA- Mechanical Analysis Electronic Systems Enabled (MCAD) (CAE) (ECAD) Engineering Tool Instrument Y AP 203 AP 209 AP 210 AP 233 Object Discipline Model Mappings Integrated Spacecraft X Instrument Y Master Models Master Model Master Model
The Product Master Model Evolution: The Product Master Model Evolution: Population of Model Contents Over the Mission Life Cycle Population of Model Contents Over the Mission Life Cycle Pre-Phase A Phase A/B Phase C/D Integrated Prototyping Detailed Design, Mission Proposal and Analysis Build, and Test Mission Mission Mission Parameters Parameters Parameters Requirements Requirements Requirements Functional Functional Functional Model Design Design Behavioral Behavioral Design Model Interface Preliminary Physical Control Docs Components Model Physical Design/Arch.
Benefits of a STEP-based Benefits of a STEP-based IPDM Service IPDM Service G Exchange of models among CAx tools from different vendors G Exchange of models between CAx tools from different disciplines (electrical/mechanical/analysis/simulation) G Cross-discipline model integrity (common information is shared), enabling a robust Systems Engineering view G Tracking of all mission/model parameters throughout the life cycle G Standard library format for product model/design re-use G Standard, STEP-based PDM format for NASA/contractor data sharing Avoids requiring contractors to buy the same tools (expensive for � the contract; additional learning curve) � Major OEM’s are using STEP in this way
The NASA STEP Testbed The NASA STEP Testbed IPDM Pilot IPDM Pilot G Objective: � To provide a plug-and-play service for the management, integration, and synthesis of multi-disciplinary product models for heterogeneous tools and applications G Implementation: � Expresso will provide the “model integration and view synthesis” engine (integrating application-specific models into the Product Master Model and synthesizing other application- specific view models out of the Product Master Model) � EXPRESS-X mappings will define the transformations between the STEP AP data (application-specific models created by tools) and the STEP-based Product Master Model � OMG PDM Enablers and CAD Services interfaces will be implemented using CORBA and Python to provide plug-and-play access for tools and applications
For More Info: STEP/OMG URL’s! For More Info: STEP/OMG URL’s! STEP On-Line Information Service (SOLIS) -- http://www.nist.gov/sc4 G Expresso ( free download ) -- http://step.nasa.gov/testbed#expresso G � Note: available as source (lisp) or binaries for Windows or Linux. STEP On A Page (a capsule summary and current status of STEP) -- G http://pdesinc.aticorp.org/step_on_a_page.ppt PDES, Inc.: a government-industry consortium implementing STEP -- G http://pdesinc.scra.org USPRO (U.S. Product Data Association), distributor for STEP documents -- G http://www.uspro.org NASA STEP Central: the main NASA site for STEP information -- G http://step.nasa.gov The NASA STEP Testbed: STEP/OMG infrastructure pilot project -- G http://step.nasa.gov/testbed The OMG Manufacturing Domain Task Force (MfgDTF): PDM Enablers, etc. -- G http://www.omg.org/homepages/mfg
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