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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

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

Raju Mattikalli

Brian Ummel

Bruce Fritchman

Boeing Mathematics and Computing Technology

overview
Overview
  • Integrated design - information flow
  • Subsystem design process today
  • KIRTS
  • KIRTS-EASY5 proof of concept
  • Lessons learnt
  • Conclusions, future work
information flow during design
Information flow during design
  • Gaps exists
  • Tool integration is required
  • Need to improve product representation

Preliminary

Design

Detailed

Design

Functional

Analysis

integrated design
Integrated design

Requirements -

  • Manage change
  • Maintain consistency
  • Represent system in intermediate states
  • Support different views
  • Capture product variations
  • Concurrent product/process development
the process today
The process today
  • PD
    • Architecture
    • Functional requirements + interfaces
    • Schematic
    • Analysis, get component requirements
  • ID
    • Schematic <==> component catalog
    • Analysis <==> vendor software
    • Refine analysis
the process today contd
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
the tools
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
filling the gaps

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

build a proof of concept

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
kirts aircraft systems design
KIRTS: Aircraft Systems Design
  • In context design generation
  • Rich design representations
  • Find errors and inconsistencies
  • Explore and evaluate design alternatives
kirts approach
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
integrating cad and function
CAD Representation

Solid Models

Parts & Assemblies

Ports / Interfaces

Part Classifications

Schematics

Connectivity

System Hierarchy

Simulation Models

Integrating CAD and Function
kirts schematic
KIRTS Schematic
  • Component names, types, ports
  • Connectivity
  • Currently specified in prolog
    • connect_ schem(FilterU, 'Outlet', Line3U, '1')
    • connect_schem(ReliefValveU, 'Inlet', Line3U, '2')
relate schematic to geometry
Relate schematic to geometry
  • Many-many mapping
  • Need to maintain consistency
  • Change propagation
implement connectivity
Implement connectivity
  • Generate tubes automatically
  • Map tubes to schematic
generate easy5 xml
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….

a typical easy5 component pipe
QuantityA 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

...

library data
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, ...
advantages
Advantages
  • Greatly simplifies generation of EASY5 model
    • connectivity
    • parameters
  • Better control over scope of analysis
    • specific geometric contexts
    • specific spatial context
    • specific system
lessons learned
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
need better integration
Need better integration

Want ---

  • Simulation based design
  • Numerically optimize design parameters
  • Integrate with PD

Produce better design early in design process

conclusion
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