All-Hands e-Manufacturing Workshop18 September 2006 Unobtrusive Capture of Engineering Knowledge...

All-Hands e-Manufacturing Workshop 18 September 2006

Unobtrusive Capture of Engineering Knowledge

Heather ReaScottish Manufacturing InstituteHeriot-Watt UniversityEdinburgh

18 September 2006All-Hands e-Manufacturing Workshop

Outline

• Scottish Manufacturing Institute

• Digital Tools Group Research

• Current e-Work

• Knowledge Capture


Outline



• Current e-Work



Scottish Manufacturing Institute

• One of fourteen EPSRC fundedInnovative Manufacturing Research Centres

• ≈ £4 million over 5 years

• Portfolio funding

• Generate new technology and knowledge tohelp support UK manufacturing


SMI Research Themes

• Digital Tools

• Digital Technologies for Engineering Design• Management of Digital Information

• Photonics

• Lasers• Laser Manufacturing Processes

• Micro Systems

• Make Very Small Things• Scale Down Processes – Lab-on-a-chip


Outline



• Current e-Work



Digital Tools Themes

Four interconnected themes:

• Technology Assessment

• Interface Design

• Design (user) Behaviour

• Design & Manufacturing Data


Digital Tools Objectives

• new technologies impact and the design process• human computer interfaces of design systems• more effective access to relevant data

• improve work flow and project management

• improve design output quality and improve

through-life-management of the design data

• increase competitiveness


Digital Tools Projects

• Immersive Design & 3D Interaction

• Rapid Prototyping Technologies

• Shape Search - 3D Search Engine

• Surface Texture - Capture & Modelling

• Putting Images on 3D Surfaces

• Heterogeneous Materials

• Haptic Interfaces in Design & Manufacture

• Digital Watermarking

• Capture and Management of DesignKnowledge and Intent


Outline



• Current e-Work


Digital Tools Projects

• Immersive Design & 3D Interaction

• Rapid Prototyping Technologies

• Shape Search - 3D Search Engine

• Surface Texture - Capture & Modelling

• Putting Images on 3D Surfaces

• Heterogeneous Materials

• Haptic Interfaces in Design & Manufacture

• Digital Watermarking

• Capture and Management of DesignKnowledge and Intent


Shape Search

• Searching for shapes based on geometry

• Allow reuse of tooling, CAD data, process knowledge

• Finding duplicate parts


Shape Search


Immersive Design & 3D Interaction

• Develop Useful & Usable 3D Design Systems

Using Advanced Visualisation Technology

• Improve Design Process

• Measure Design Performance


Assembly Planning & Knowledge Elicitation

Tie Bar

Lower

Guide

Left

Frame

Right

Frame

Left Frame

Right Frame

Tie Bar

Lower Guide

Upper Guide Tie Bar Tie BarTie Bar

Upper Guide

Upper Guide

Lower Guide

Lower Guide


CHIVE

Comparison of Immersive System with Desktop CAD Systems for Simple Harness Design TaskCHIVE task times 2 – 4x faster than Desktop CAD


COSTAR

• 3D Interface Design • Technology Assessment • Analysis of User Design Activity• 10 Participants (9 HWU & 1 Industry)• 3 Design Tasks• Questionnaire, Interview and Performance Data


COSTAR

Add Cable 1

Delete Cable 2

Fix Cable Error

Save Model & Export Documentation

Exit System

Purpose of User Activity

Design Info System Op Navigate Integrate


Process Integration5s, 0%

Navigation509s, 41%

System Operation293s, 23%

Information106s, 9%

Design343s, 27%

Costar - Results

Navigation1s, 1%

System Operation70s, 79%

Information2s, 2%

Design Support5s, 6%

Design Goal11s, 12%

Main Activity Distributed by Time

Unproductive Activity


COSTAR 2

• New Simplified Interface• Navigation Aids• Curve fitting• Conduit & Piping Design


Haptic Interfaces in Design & Machining

applying tactile sensation to computer interactions



• Using haptic feedback and 3D stereo-rendering to

create novel application interfaces to a range of

macro/micro manufacturing and assembly tasks

• The study of human factors for evaluation of both user

functionality and cognitive measures. This approach

will enable the quantitative assessment of each applied

technology and its associated interface.



Design for assembly (DFA) methodologies have quantified the relative times of real-world assembly tasks:

• Grasping• Acquisition• Manipulation• Insertion

Could Haptic assembly performance benchmarked against previously quantified data?


Hypothesis

Collision detection affects total completion time (TCT) and error rates.

Stereoscopic glasses affect TCT and error rates.

Chamfers affect TCT and error rates.


Results


Capture and Management of Design Knowledge and Intent

EPSRC Grand Challenge

‘Immortal Information and Through-life Knowledge

Management (IITKM): Strategies and Tools for the Emerging

Product-service Paradigm’


Digital Watermarking

“Digital Watermarking is embedding or hiding ofencoded information into digital data so that theinformation is imperceptible, easy to read by authorised parties only, and difficult to remove without destroying the value and/or the originaldata.” (Matheson et al., 1998)



It can be used to:

• identify the source, owner, creator,

distributor, …

• notify about copyright policy

• track lost data

• monitor the distribution of data

• prevent theft

• restrict or regulate access to the original data

• identify the original data



Project aim:• develop a geometry based digital watermarking system for 3D CAD

models to secure the provenance of commercial 3D design data.

Methodology:State of the art review• Current digital rights management (DRM) technologies for electrical

data types (e.g. music, images, text, film)

• suitable watermarking algorithms and technologies

• CAD product data formats, assessing effects of translation,

modification, copying, etc.

Questionnaires and interviews to establish industrial concerns and

requirements

Design and develop watermarking system in C++

Assessment, testing and implementation of the digital

watermarking system.



Objective - to explore the potential for (semi) automated techniques for the capture of design knowledge to reduce overhead in building models. Development of operator logging methods

for CAD, VR and other designer activity Development of methods for inferring

design activity and for model instantiation



• Identify suitable design environment for

consideration• Develop methods of capturing and logging

user interactions with the design

environment• Identify variables and design experiments

to infer design activity• Develop methods for inferring design

activity and for model instantiation.


Outline



• Current e-Work



Unobtrusive Capture of Engineering Knowledge

• Working in with digital tools • easy to capture user activities

• Capturing data• Reduce overheads• Accurate data• Manage knowledge

• Monitoring behaviour• Information push

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All-Hands e-Manufacturing Workshop18 September 2006 Unobtrusive Capture of Engineering Knowledge...

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