STEP-TAS and its Benefits to Thermal Engineering STEP for Aerospace Workshop January 18, 2001 Georg Siebes

STEP-TAS and its Benefits to STEP-TAS and its Benefits to Thermal EngineeringThermal Engineering

STEP for Aerospace WorkshopSTEP for Aerospace Workshop

January 18, 2001January 18, 2001

Georg SiebesGeorg Siebes

January 18, 2001 GS - STEP-TASSlide - 2

OutlineOutline

STEPSTEP Zooming in on STEP-TASZooming in on STEP-TAS STEP-TAS DetailSTEP-TAS Detail The U.S. STEP-TAS PilotThe U.S. STEP-TAS Pilot What are the benefitsWhat are the benefits


What is STEPWhat is STEP

STEPSTEP = = STSTandard for the andard for the EExchange of xchange of PProduct model data roduct model data = casual name for ISO 10303= casual name for ISO 10303

““STEP is anSTEP is an international standard, which international standard, which provides an unambiguous, computer-provides an unambiguous, computer-

interpretable definition of the physical and interpretable definition of the physical and functional characteristics of a product functional characteristics of a product

throughout its life cycle.”throughout its life cycle.”


Electrotechnical design: AP210 and AP212Electromechanical design: AP210 and AP212

Structural analysis: AP209Structural analysis: AP209

Documentation: PDFDocumentation: PDF, HTML

Propulsion: STEP-PRPPropulsion: STEP-PRP

Mass-CoG-MoI: STEP-MCI (subset of AP214)Mass-CoG-MoI: STEP-MCI (subset of AP214)

Optical analysis: NODIFOptical analysis: NODIF

… (other discipline oriented protocols)Fluid Dynamics (& other discipline oriented protocols)

Thermal analysis: STEP-TASThermal analysis: STEP-TAS

Mechanical and assembly design: AP203 and AP214Mechanical and assembly design: AP203 and AP214

system product definition analysis & simulation & test results & delivery

Res

ult

s o

f A

na

lysi

s,

Te

st a

nd

Op

era

tio

n C

am

pai

gn

s: S

TE

P-N

RF

Res

ult

s o

f A

na

lysi

s,

Te

st a

nd

Op

era

tio

n C

am

pai

gn

s: S

TE

P-N

RF

Pro

du

ct C

on

fig

ura

tio

n:

AP

20

3 /

AP

214

/ P

DM

Sc

hem

a

Pro

du

ct C

on

fig

ura

tio

n:

AP

20

3 /

AP

21

4 /

PD

M S

ch

em

a

Sys

tem

En

gin

ee

rin

g:

AP

23

3S

yste

m E

ng

ine

eri

ng

: A

P2

33

Te

chn

ical

Da

ta P

ack

ag

e: A

P2

33

Te

chn

ical

Da

ta P

ack

ag

e: A

P2

32

ISO 10303Industrial Automation

Systems -

Product representation

and exchange

ISO 10303Industrial Automation

Systems -

Product representation

and exchange

ECSSWG E-10-07

Exchange of

Product Data

ECSSWG E-10-07

Exchange of

Product Data

In production use Commercial implementation started Final stages of development

STEP Architecture for Aerospace

*European Cooperation for Space Standardization*

You arehere


What is STEP-TASWhat is STEP-TAS

STEP-TASSTEP-TAS = = TThermal hermal AAnalysis for nalysis for SSpacepace

Application Protocol for space

missions and models used in

thermal analysis.


Details of STEP-TASDetails of STEP-TAS

p2

direction-1

direction-2

p3

p1

diameter

start_angle

end_angle

ShapesShapes Primitives: triangle, Primitives: triangle,

rectangle, quadrilateral, rectangle, quadrilateral, disc, cylinder, cone, sphere, disc, cylinder, cone, sphere, paraboloidparaboloid

Compound shapesCompound shapes Shapes conform to AP203 Shapes conform to AP203

CC4 non-manifold surfacesCC4 non-manifold surfaces

Thermal-radiative modelThermal-radiative model associates thermal-radiative associates thermal-radiative

faces with surface shapesfaces with surface shapes thermal meshthermal mesh propertiesproperties



semi_major_axis

governing_celestial_bodyperiapsis

true_anomaly

eccentricity = 1

main body (of spacecraft )

Space mission aspectsSpace mission aspects orbit arc (Keplerian and discrete orbit arc (Keplerian and discrete

ephemeris)ephemeris) space co-ordinate system, space co-ordinate system,

celestial bodiescelestial bodies orientation, general and named orientation, general and named

pointing, spinning, linear rotation pointing, spinning, linear rotation ratesrates

space thermal environment, space thermal environment, including constant or lat/long including constant or lat/long dependent albedo / planetshine dependent albedo / planetshine tablestables



+Y shaft-Y shaft

main body

+Y yoke

-Y yoke

+Y panel 1

+Y panel 2

-Y panel 1

-Y panel 2

+X

+Y

+Z

main body

+Y yoke-Y yoke

+Y panel 1

+Y panel 2

-Y panel 1

-Y panel 2

is a kinematic_link

is a kinematic_joint

(a) Schematic shape model of a typicalcommunications satellite with two fully

deployed solar array wings

(b) The corresponding kinematic_modelpresented as a topological graph

+Y shaft

-Y shaft

Kinematic model Kinematic model conforms to STEP conforms to STEP Part 105 for Part 105 for articulating rigid articulating rigid bodies (e.g. bodies (e.g. rotating solar rotating solar arrays, gimballed arrays, gimballed antennasantennas


Examples of STEP-TAS ExchangesExamples of STEP-TAS Exchanges

ESARADThermica

STEP-TASViewer


Examples of STEP-TAS ExchangesExamples of STEP-TAS Exchanges

STEP-TAS

TSS

ESARAD

Thermica

(hand coded)


The U.S. STEP-TAS Pilot - ParticipantsThe U.S. STEP-TAS Pilot - Participants


The U.S. STEP-TAS Pilot - GeometryThe U.S. STEP-TAS Pilot - Geometry

ISO-10303-21;HEADER;...#109=TYPE_QUALIFIER('diffuse');#110=TYPE_QUALIFIER('infra_red');#111=ATR_PROPERTY_NAME('transmittance');#112=ATR_PROPERTY_QUANTITATIVE(#111,.SYMMETRICAL.);#113=ATR_PROPERTY_USAGE(#71,#112,#114);#114=ATR_PROPERTY_MEANING((#109,#110));#115=SI_UNIT(*,$,.METRE.);#116=SI_UNIT(*,$,.DEGREE_CELSIUS.);#117=GLOBAL_UNIT_ASSIGNED_CONTEXT('','',(#115,#116));#118=GLOBAL_UNCERTAINTY_ASSIGNED_CONTEXT('','',(#119,#120));#119=UNCERTAINTY_MEASURE_WITH_UNIT(LENGTH_MEASURE(1.E-008),#115,...


Live Demo at NASA Live Demo at NASA TFAWSTFAWS Conference Conference


Current STEP-TAS Implementation StatusCurrent STEP-TAS Implementation Status

TRASYSTRASYS

STEP-TAS

TSSTSS

Thermal Desktop (RadCad)

Thermal Desktop (RadCad)

ESARADESARAD

THERMICATHERMICA

CORATHERMCORATHERMTAS(Harvard Thermal)

TAS(Harvard Thermal)

SINDA/ATMSINDA/ATM

NevadaNevada

Baghera View

Baghera View

Available without Boolean operations

Available for small models

Planned for 2001

Available through SIMULOGcomplete implementation planned

complete implementation planned

complete implementation planned

complete implementation (beta)

One shot Mars Rover demonstrator, complete implementation planned

Prototype available

ESA starting complete implementation

IMOSIMOS

JPL multi-disciplinaryin-house tool

complete

in progress

Cross validation for large models, expected soon


Benefit: Compliance with NASA Standard 2817Benefit: Compliance with NASA Standard 2817

The NASA CIO has officially approved and released The NASA CIO has officially approved and released NASA-NASA-STD-2817 (STD-2817 (COMPUTER-AIDED ENGINEERING, DESIGN AND

MANUFACTURING DATA INTERCHANGE), which includes the , which includes the requirement for CAx systems used by NASA to have tools requirement for CAx systems used by NASA to have tools that support ISO 10303 (STEP).that support ISO 10303 (STEP).

Preferred standards include APs 203, 209, 210, 225, and 227 Preferred standards include APs 203, 209, 210, 225, and 227 for exchanging data among PDM, mechanical and electronic for exchanging data among PDM, mechanical and electronic CAD/CAM, civil and facilities CAD, and CAE/analysis CAD/CAM, civil and facilities CAD, and CAE/analysis systems. systems. STEP-TAS included in draft of next revision.STEP-TAS included in draft of next revision.

Tools that enable data interchange, compliant with these Tools that enable data interchange, compliant with these standards, must be available to all CAE/CAD/CAM users at standards, must be available to all CAE/CAD/CAM users at each NASA Center.each NASA Center.


Benefit: Significant reduction in translatorsBenefit: Significant reduction in translators

~ N2

Point to Point Translators

~ N

STEP


Benefits of STEP - TASBenefits of STEP - TAS

Thermal Radiation models can be freely Thermal Radiation models can be freely exchanged globallyexchanged globally

Some thermal processes can be tailored to Some thermal processes can be tailored to needs rather than being driven by toolsneeds rather than being driven by tools

Thermal models can be archived and retrieved Thermal models can be archived and retrieved independent of tool proprietary formatsindependent of tool proprietary formats

Will save time and moneyWill save time and money Engineers can spend more time engineering Engineers can spend more time engineering

and less time translating dataand less time translating data


BenefitsBenefits

Demonstrate that ...

.

.Faster, Better, Cheaperreduced cycle timeArt to Partfaster time to market..

... are not just words


Remember STEP is ...Remember STEP is ...

S omethingT oE mbraceP ermanently

Documents

STEP-TAS and its Benefits to Thermal Engineering STEP for Aerospace Workshop January 18, 2001 Georg Siebes