STEP Tutorial: “STEP Capability Today and Tomorrow” Keith Hunten, Lockheed Martin January 16,...

STEP Tutorial:“STEP Capability Today

and Tomorrow”

Keith Hunten, Lockheed Martin January 16, 2001

®PDES, Inc.

Copyright PDES, Inc. 2001PDES, Inc.®

AgendaCurrent Capabilities

– Application Protocols– Modules

Evolving Capabilities– STEP for the Web– Product Life Cycle Support– Systems Engineering– STEP NC (Numerical Control)


STEP Crosses Multiple Industries

AerospaceAutomotiveElectronicsShipbuildingSoftwareProcess PlantBuilding &

Construction

STEP Application Protocols (APs)


ISO 10303-202: Associative Draughting http://pdesinc.aticorp.org/aps.html

Dra wing Struc ture

Dra w ing Re visio nShe e t Re visio nsV ie w sDra fting Sp e c ific a tio nsC o ntra c tSe c urity C la ssific a tio nA p p ro va lsRe sp o nsib le O rg a niza tio ns

Pro d uc t Re la tio n

Pa rtRe sp o nsib le O rg a niza tio n

G e o m e tric Sha p e s

A d va nc e d BREP So lid sFa c e tte d BREP So lid sEle m e nta ry BREP So lid sM a nifo ld Surfa c e s w / To p o lo g yW ire fra m e w ith To p o lo g ySurfa c e s a nd W ire fra m eW itho ut To p o lo g yG e o m e tric a lly Bo und e d2D Sha p e

A sso c ia tivity

Fro m G e o m e tric M o d e l to :D im e nsio nsC a llo utsFill A re a s

A nno ta tio n

Te xtA nno ta tio n C urve sSym b o lsSub fig ure sFill A re a sD im e nsio nsG ro up ing

La ye rsG ro up s


ISO 10303-203: Configuration Controlled 3D Designs of Mechanical Parts and

Assemblies http://pdesinc.aticorp.org/aps.html

Configuration Management• Authorisation• Control(Version/Revision)• Effectivity• Release Status• Security Classification• Supplier

Geometric Shapes• Advanced BREP Solids• Faceted BREP Solids• Manifold Surfaces with Topology• Wireframe with Topology• Surfaces and Wireframe without Topology

Specifications• Surface Finish• Material• Design• Process• CAD Filename

Product Structure• Assemblies• Bill of Materials• Part• Substitute Part• Alternate Part


ISO 10303-209: Composite & Metallic Analysis & Related Design

http://pdesinc.aticorp.org/aps.html

Configuration Control, Approvals

• Part, product definitions

• Finite element analysis model, controls, and results

Analysis Discipline Product Definitions

• Finite Element Analysis–Model (Nodes, Elements, Properties,...)

–Controls (Loads, Boundary Constraints,...)

–Results (Displacements, Stresses,...)

• Analysis Report

Design Discipline Product Definition

• Shape Representations

• Assemblies

Information Shared Between Analysis & Design

• 3D Shape Representations

• Composite Constituents

• Material Specifications & Properties

• Part Definitions

Composite Constituents

• Ply Boundaries, Surfaces

• Laminate Stacking Tables

• Reinforcement Orientation

Material Specifications & Properties

• Composites

• Homogeneous (metallics)

3D Shape Representation

• AP202/203 Commonality Plus Composite Specific 3D Shapes

–Advanced B-Representation

–Facetted B-Representation

–Manifold Surfaces With Topology

–Wireframe & Surface without Topology

–Wireframe Geometry with Topology

–Composite Constituent Shape Representation

ISO 10303-210: Electronic Assembly,Interconnect and Packaging Design


Technology

Physical• Component Placement• Bare Board Geometry• Layout items• Layers non-planar, conductive & non-conductive• Material product

• Geometrically Bounded 2-D• Wireframe with Topology • Surfaces• Advanced BREP Solids • Constructive Solid Geometry

Part• Functionality• Termination • Shape 2D, 3D • Single Level Decomposition• Material Product• Characteristics

Configuration Mgmt• Identification• Authority • Effectivity • Control• Requirement Traceability• Analytical Model• Document References

Product Structure/Connectivity

• Functional• Packaged

• Fabrication Design Rules• Product Design Rules

Requirements• Design• Allocation• Constraints• Interface• Rules

• Geometric Dimensioning and Tolerancing

Geometry

Design Control


ISO 10303-212: Electrotechnical Design and Installation

http://public.prostep.de/spo/

Electrotechnical Equipment in Industry

Electrotechnical Plant• Plant, e.g., Automobile• Unit, e.g., Engine Control System• Subunit, e.g., Ignition System

Electrotechnical Systems• Buildings • Plants• Transportation Systems

Equipment Coverage• Power-transmission• Power-distribution• Power-generation• Electric Machinery• Electric Light and Heat• Control Systems

Data Supporting• Terminals and Interfaces• Functional Decomposition of Product• 3D Cabling and Harnesses• Cable Tracks and Mounting Instructions

Geometry

• Solids Data

• Surface Data

• Wireframe

• Measured Data

Analysis

• Simulation

Technology Data

• Material Data

• Form Features

• Tolerance Data

• Surface Conditions

Manufacturing

• NC-Data

• Process Plans

Specification/Configuration

• Product Structure Data

• Management Data

Presentation

• Drawing

• Visualization

ISO 10303-214: Core Data for Automotive Mechanical Design Processes

http://public.prostep.de/spo/


Shipbuilding APshttp://www.nsnet.com/NIDDESC/t23.html

ISO 10303-215 -- Ship ArrangementISO 10303-216 -- Ship Moulded FormsISO 10303-218 -- Ship StructuresISO 10303-226 -- Ship Mechanical Systems


ISO 10303-221: Functional Data and their Schematic Representation for Process Plant

http://www.stepcom.ncl.ac.uk/epistle/ap221/ap221.htm

Plant Types• Power Generation

• Nuclear• Conventional

• Chemical• Petroleum

Across Plant Life Cycle

• Provide Continuity for• Design• Construction• Operation

Identifies & Describes• Equipment• Components• Systems• Subsystems

2D Schematic Displays(Piping and Instrumentation diagrams)• Connectivity of Equipment• Pipeline designation (line number)• Direction of fluid flows• Control-loop designation/component

ISO 10303-224: Mechanical Product Definition for Process Planning Using Machining Features

http://isg.scra.org/products/step_ap224.html

Machining Features• Boss• Hole• Fillet• Groove• Pocket

Manufacturing Part Properties• Material Property• Part Property• Process Property• Hardness

Feature Definition Items & Profiles• Path• Taper• Profile• Bottom Condition• End Types

Part Administration Data• Approval• Person in Organization

Measurement Limitations• Angularity• Flatness• Radial Dimension• Material Condition

Modifier• Tolerance Range Shape Representation

• Brep Model• Explicit Base Shape• Block Base Shape• Ngon Base Shape• Cylindrical Base Shape


ISO 10303-225: Building Elements Using Explicit Shape Representationhttp://www.haspar.de/Ap225/index_eng.htm

Building Element Types• Structural• Service Elements• Fixtures, Equipment

Building Element Shape

• Component Structure• Explicit Shape Representation• Elementary (planar), Analytic (simple geometry) & Free Form (complex geometry)

Building Structure

• Composition• Location of Elements• Assemblies of Elements

Building Element Properties

• Simple Property• Simple Classification


ISO 10303-227: Plant Spatial Configurationhttp://cic.nist.gov/plantstep/plantstp/ap227/ap227.htm

Plant Layout• Location of Plant-items• Site Description• Change Control

Functional/Analysis• Interference• Performance Requirements• Requirement Satisfaction

Plant Systems• Line Definitions• Composition• Capabilities• Component Connectivity

Plant Item• Type• Connections• Functional/Physical• Definition/Occurrence

Shape• Explicit Shape• Brep• CSG


AP232: Technical Data PackagingCore Information and Exchange


PDM System A

Product Data Groups (STEP)

• AP 232

• AP 209

• AP 203

• AP XXX

Product Data Group Packaging

• Product Structure Based

• Product/Document Relationships

• Exchange Configuration Parameters

• Ties all Forms of Product Data together(Both STEP and Non-STEP data)

Product Data Groups (Non-STEP)

• Drawings

• CAD Models

• Associated Lists

• Reference Documents

• Analysis Files

• NC Program

• etc.

Document Configuration

• Versioning

• Representation Forms

• Identification of Content File(s)

• Configuration Parameters

Associated Lists

• Parts List

• Data List

• Index List

• Indentured Data List

• Other Lists

• Presentation

Product Data Sets (Shape)

• Advanced B-Representation

• Facetted B-Representation

• Manifold Surfaces with Topology

• Wireframe and Surface without Topology

• Wireframe Geometry with Topology

Exchange Parameters

• Reason

• Destination

• Identification of Associated Business Documents

PDM System B

STEP Modules


Modular Extension Strategy

1988-1994 1994-1998 1998-2003

CDIMs/ APs

AP Interoperability Plug and PlayIslands of APs

APs with initial AICs

APAP

APAP

AIC

AP203 - IS(example)

STEP Modules

Colors/Layers

ValidationProperties

…….Associative Text


Colors/Layers/Groups http://pdesinc.aticorp.org/modules.html

USAGE SCENARIOS

Used for design coordination between different IPTs and Suppliers to:• differentiate components in mockups• identify different components per IPT or System, such as:

• forward fuselage/wing/cockpit• hydraulic/electrical/fuel

• identify supplier/vendor components• identify high temperature components• identify design stability of components


Product Data Management (PDM) http://pdesinc.aticorp.org/modules.html

USAGE SCENARIOS

• Exchange bill of materials • Exchange only the information that has changed (net change)

• Exchange configuration management data

Component 1 Component 2


Scope of thePDM Modules

AliasIdentifi-cation

ContractWork and

ChangeManagement

Part Identification

Part Structure

Part Properties

DocumentIdentification

DocumentStructure

File Identification

Document/File

Properties

Part Management Document Management

Person and Organization

ApprovalSecurity

Classification

Date and Time

Authorization

Effec-tivity

Geometry Assignment

and Transformation


Dimensional Tolerances http://pdesinc.aticorp.org/modules.html

USAGE SCENARIOS

• Identify critical dimensions and tolerances for components

• Provide Dimensions/ Tolerance data independently of orthographic drawings

- e.g., for Coordinate Measuring Machine programming

100.00±.05

100.00±.05

+

50.00±.05

20.0

0±.0

5

50.00±.05


Drafting Annotation/Notes http://pdesinc.aticorp.org/modules.html

USAGE SCENARIOS

• Portray attributes, concepts about

parts not captured geometrically

• Provide reference information

• Add process

information/clarifications

• Identify peculiarities of design

• Identify design constraints

• Present tolerances

Forward Edge


Associative Dimension and Model Viewing

http://pdesinc.aticorp.org/modules.html

2.0 + .02

+.012.0 -.03

1.5

.5

presentation_view

drawing_sheet_revision


Geometric Validation Properties http://pdesinc.aticorp.org/modules.html

USAGE SCENARIOS • Geometric Properties can be calculated from the geometric definition; they are exchanged to enable the validation of translation processes

• Enables highlighting geometry whose properties have changed beyond a user supplied tolerance(s)

- User investigates geometry that changes outside the specified tolerance

Volume &centroid (x,y,z)

Surface area


USAGE SCENARIOS

• When a model parameter changes the construction history can be replayed to update the design geometry

• Use construction history to analyze/modify order of design operations

3rd cut

2nd cut

1st cut

Revolve

Node: “1st cut” with 2children, “Revolve” and“Extrude

Leaf:a primitiveblock withno children

Extrude

Construction History http://pdesinc.aticorp.org/modules.html


Engineering Analysis http://pdesinc.aticorp.org/modules.html

USAGE SCENARIOS

• CAE to CAE Exchange

• AP209 to represent CAE/CAD/PDM

• AP209 for Long Term Data Retention

The Engineering Analysis Core Model (EACM) supports otherareas of analysis, such as Computational Fluid Dynamics

Evolving Capabilities


STEP for the Web

The Web has its own implementation technology, XML and XML-related standards

The Web lacks standardized vocabularies, content and/or schemas

STEP is strong on content!PDES, Inc. and others are working to make

STEP content available to Web implementors in a form they know - XML


Web Content Standardization

The goal is to publish STEP schemas in XML for Web developers

ISO 10303-28 is a mapping from STEP EXPRESS to XML

PDES, Inc. has created a separate STEPml web site to support Web implementors -- http://www.stepml.org– Publish Usage Guides, not ISO standards, that

document the STEP “schemas” in Web format (Data Type Definitions - DTDs, OMG’s XML Schema)



SupportEngineering

Maintenanceand

Feedback

CM/ChangeControl

ResourceManagement

Product Life Cycle Support (PLCS) Areas of Developmenthttp://www.plcsinc.org/ Support Engineering

– Provide and sustain the support infrastructure

Resource Management– Buy, store, pack, move, issue and

dispose of the physical product CM/Change Control

– Manage change to a configured item throughout the life cycle including tracking of serial number where applicable

Maintenance and Feedback– Maintain, test, diagnose, calibrate,

repair and modify physical product, including schedules, resources and feedback


Systems Engineeringhttp://www.sedres.com

System

Analysis

Requirements trade studies

Functional trade studies

Design trade studies

Control

Requirements analysis

Requirements Baseline

validation

Functional analysis

Functional Verification

Synthesis

Physical Verification

Sub-System specifications

CustomerRequirements

STEP AP233 is evolving to satisfy Systems Engineering requirements


CAMsystem

Shopfloorprogramming

PlanningDepartment

Shopfloor

New data model and interface (ISO 14649)

Post-processor

ConventionalNC controller

CAD workpiece data

New, IntelligentNC controller

Intelligentfunctions

e.g. automatic- path generation- tool selection- technology support- retract strategies- machine limits

Design

ModernNC controller

Direct control of machine tools from 3D data

STEP-NC (ISO 14649)http://www.steptools.com/library/stepnc

Courtesy WZL RWTH Aachen


Summary

STEP provides fast, reliable data exchange between partners and suppliers using different systems

Extensive STEP capabilities are available today for use by multiple industries

Powerful new evolving capabilities will be available in 2001

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