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Integrated subsystem design - Auto-generating EASY5 models from CAD data

Integrated subsystem design - Auto-generating EASY5 models from CAD data. Raju Mattikalli Brian Ummel Bruce Fritchman. Boeing Mathematics and Computing Technology. Overview. Integrated design - information flow Subsystem design process today KIRTS KIRTS-EASY5 proof of concept

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Integrated subsystem design - Auto-generating EASY5 models from CAD data

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  1. Integrated subsystem design - Auto-generating EASY5 models from CAD data Raju Mattikalli Brian Ummel Bruce Fritchman Boeing Mathematics and Computing Technology

  2. Overview • Integrated design - information flow • Subsystem design process today • KIRTS • KIRTS-EASY5 proof of concept • Lessons learnt • Conclusions, future work

  3. Information flow during design • Gaps exists • Tool integration is required • Need to improve product representation Preliminary Design Detailed Design Functional Analysis

  4. Integrated design Requirements - • Manage change • Maintain consistency • Represent system in intermediate states • Support different views • Capture product variations • Concurrent product/process development

  5. Our context - System (tubing) design

  6. The process today • PD • Architecture • Functional requirements + interfaces • Schematic • Analysis, get component requirements • ID • Schematic <==> component catalog • Analysis <==> vendor software • Refine analysis

  7. The process today (contd.) • DD • Physical components for nodes • Place components in 3D • Determine interfaces • Schematic lines to spaghetti tubes • Route tubes • Break tubes • Finalize schematic, rerun simulation

  8. The tools • IDM - preliminary design • architecture, layout, schematic, sizing • EASY5 - functional analysis • performance • CATIA - corporate CAD, PDM tool • KIRTS - detailed design • generative geometry • SPARTS, ESDS, CPIMS, Enovia

  9. XML Filling the gaps EASY5 - connectivity - flow direction - parameters - analysis IDM (PD) - connectivity - tube size, c-line - flow reqds - flight condn Schematic (KIRTS) - connectivity - logical ports - EASY5 types - mapping to geom KIRTS - geometry - assembly str CATIA

  10. EASY5 - connectivity - flow direction - parameters - analysis XML KIRTS - geometry - assembly str Schematic - connectivity - logical ports - EASY5 types - mapping to geom Build a proof of concept • Automatic EASY5 model from KIRTS • Input to KIRTS • equipment geometry • equip. names, types • connectivity • KIRTS generates tubes • Output from KIRTS • EASY5 XML of schematics • Functional model in EASY5

  11. KIRTS: Aircraft Systems Design • In context design generation • Rich design representations • Find errors and inconsistencies • Explore and evaluate design alternatives

  12. KIRTS approach • Rich, integrated design representations • Logical reasoning about design representations • Design rules that operate on the design representations • Grammars for generating languages of designs

  13. CAD Representation Solid Models Parts & Assemblies Ports / Interfaces Part Classifications Schematics Connectivity System Hierarchy Simulation Models Integrating CAD and Function

  14. KIRTS context

  15. KIRTS Schematic • Component names, types, ports • Connectivity • Currently specified in prolog • connect_ schem(FilterU, 'Outlet', Line3U, '1') • connect_schem(ReliefValveU, 'Inlet', Line3U, '2')

  16. Relate schematic to geometry • Many-many mapping • Need to maintain consistency • Change propagation

  17. Implement connectivity • Generate tubes automatically • Map tubes to schematic

  18. Generate EASY5 XML • Produced from schematic • Geometric parameters obtained from KIRTS • Other attributes also represented in KIRTS Integrated representation XML file read into EASY5 produces….

  19. EASY5 Model

  20. Quantity A typical EASY5 component (Pipe) INPUT OUTPUT Quantity Port # Port # Description Units Description Units 1 1 2 2 2 Mass inlet Temp Pressure O. Pres. Rate Temp Hy. dia. Length Roughness Heat Coeff. Heat Coeff. Flux Int. heat Therm. M. Kg/m C bar bar/sec C cm cm cm W/m2/C W/m2/C W/cm2 W J/C Q W TF P PD TR PF TW SQW SSS QF REY FRC ... Mass inlet Temp Pressure O. Pres. Rate Temp Hy. dia. Length Roughness Heat Coeff. Heat Coeff. Flux Int. heat Therm. M. Kg/m C bar bar/sec C cm cm cm W/m2/C W/m2/C W/cm2 W J/C 2 2 2 1 1 1 W TF P PD TR DH LEN RFC HI HO EFX QIN MTW ...

  21. Library data • Need to develop interfaces to library data • Company has a variety of standards libraries • Need a single library standard • Geometry, ports, analysis parameters, compatibility, preferred standards, inventory • SPARTS, ISDS, PSDS, DMAPS, Enovia, ...

  22. Advantages • Greatly simplifies generation of EASY5 model • connectivity • parameters • Better control over scope of analysis • specific geometric contexts • specific spatial context • specific system

  23. Lessons learned • Schematic is unifying concept • However granularity of schematic differs • Initial challenges • Management of ports---multiple semantics • Schematic to geometry link • Source of parameter values for analysis

  24. Need better integration Want --- • Simulation based design • Numerically optimize design parameters • Integrate with PD Produce better design early in design process

  25. Conclusion • Significant benefits from CAD integration • simplifies generation of EASY5 model • control scope of analysis • more simulation during design • But...we need better, integrated representations • Towards simulation based optimal system design

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