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STEP and OMG Standards Interoperability

STEP and OMG Standards Interoperability. Doug Cheney Senior Software Engineer International TechneGroup Incorporated. Engineering Data Producers and Consumers. Producers : Engineering Design Groups Consumers : Partner Design Groups, Analysis, Manufacturing, Test, etc. Technical Illustrator.

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STEP and OMG Standards Interoperability

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  1. STEP and OMG Standards Interoperability Doug Cheney Senior Software Engineer International TechneGroup Incorporated

  2. Engineering Data Producers and Consumers • Producers : Engineering Design Groups • Consumers : Partner Design Groups, Analysis, Manufacturing, Test, etc. Technical Illustrator Systems Engineer Assembly Print CAD Model Recreate Wiring Engineer Technical Illustrator Translate Design Engineer Using CAD System Structural Engineer Many Others...

  3. Native System Target System Native System Target System Neutral API Neutral API Complimentary Interoperability Approaches • Data integration : Exchange product data via a neutral model representation • “Bottoms-up” approach • Neutral representation is a complete, standalone definition of model • Requires two model conversions: native to standard to target • Native model is duplicated in standard and target system formats • Systems integration : Share product data via a neutral programming interface (API) • “Top-down” approach • Abstract representation exposes data and behavior needed by consumers • Requires consumer access to licensed installations of producer systems • Native model stays in native system Native Model Target Model Neutral Model Native Model Target Model

  4. Interoperability Approach Challenges • Data integration • Requires access to reliable translators • Translations can cause significant delays • Requires data rework when conversions are not 100% successful • Broad band width required for neutral model file transfer • Loss of design intent information (construction history, features, parameters) • Must manage redundant, derivative model representations • Systems integration • Requires application rework to use abstract interfaces • Requires dynamic access to installed, licensed CAD and PDM systems • Higher security risks

  5. Complimentary Usage Scenarios • Data integration • Building a multi-disciplinary repository of all product data • Long-term data retention • Legacy data migration • ‘Loose’ partner/supplier integration • Well-defined, structured and controlled design processes • Systems integration • Collaborative engineering • Real-time, multi-system assembly design • ‘Tight’ partner/supplier integration • Dynamic or evolving design processes

  6. Complimentary Standards • Data integration : STEP AP 203 • PDM (Class 1) • CAD shape representations (Classes 2 – 6) • Systems integration : OMG MfgDTF • PDM Enablers • CAD Services • STEP influence on OMG standards • Standardized definitions of geometry, B-Rep, assembly and PDM entities and relationships • Concrete data format for serializing objects (via XML) • Expect to incorporate construction history/parametrics model development

  7. OMG Manufacturing Domain Task Force • Web site: www.omg.org/homepages/mfg • PDM Enablers • V2 soon to be approved • CAD Services • Devt web site: www.grc.nasa.gov/WWW/jcad • V1 draft joint submission Dec 2000 • V1 workshop @ Boeing Feb 2001 • V1 submission June 2001 • V1 approval Dec 2001

  8. Geometry and B-Rep traversals, evaluations, point projections, mass properties Non-geometric entity attributes (color, layer, visibility, user-defined attributes) Assembly structure and component placement CAD user interactions (primarily 3D graphics subsystem) Abstract feature properties, parameter queries and modifications, model regeneration CAD Services V1

  9. CAD Services V2 (2002) • PDM Enablers interoperability • Explicit geometry and B-Rep creation • Advanced visualization queries • Geometric dimensioning and tolerancing queries • Parametric/feature-based model creation

  10. System Integration Implementations • CADScript is a commercial toolkit from ITI that enables system integrations (www.iti-oh.com/pdi) • The following organizations are using CADScript for system integrations: • Webscope • FIPER • GE Aerospace • Parker-Hannifin • BF Goodrich • OAI, ESI, Ohio Univ., Stanford Univ. • NASA • Goddard • Glenn • Details in tomorrow’s presentation!

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