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DAME: A Distributed Diagnostics Environment for Maintenance

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Title: DAME: A Distributed Diagnostics Environment for Maintenance


1
DAME A Distributed Diagnostics Environment for
Maintenance
  • Duncan Russell
  • University of Leeds

2
Project Partners
  • EPSRC Funded, 3 years, 3.2 million. Ends Dec 04
  • 4 Universities
  • University of Leeds, School of Computing and
    School of Mechanical Engineering
  • University of Oxford, Dept of Engineering Science
  • University of Sheffield, Dept of Automatic
    Control and Systems Engineering
  • University of York, Dept of Computer Science
  • Industrial Partners
  • Rolls-Royce
  • Data Systems and Solutions
  • Cybula Ltd

3
Operational Scenario
Engine flight data
London Airport
Airline office
New York Airport
Grid
Diagnostics Centre
Maintenance Centre
American data center
European data center
4
DAME Grid Challenges
  • Building a demonstration system to demonstrate
    proof of concept for Grid technology in the
    aerospace diagnostic domain
  • Two primary Grid challenges
  • Management of large, distributed and
    heterogeneous data repositories
  • Remote, secure access to diagnostics tools,
    flight data and other operational data
  • Other key issues
  • Rapid data mining and analysis of fault data
  • York AURA technology is critical component for
    data mining activity
  • Management of distributed users and resources
  • 24/7 operation QoS issues

5
DAME Architectural Overview
DAME Diagnostics
Portal
...
Case Based
Modelling/
Decision
QUOTE
Support
Reasoning
Grid Services Management
Simulation
Novel
Data
The Grid
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Matches
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AURA
Vibration
Shaft Speed
Fuel Flow
Software
Cluster
Hardware
AURA
AURA
AURA
6
WRG Distribution
7
Complex Virtual Organisation
8
Specifying Workflow
Workflow instances are specified through UML
sequence diagrams.
9
Specifying Workflow
Business workflows as Activity Diagrams
10
Workflow Requirements
  • Diagnostic Workflows
  • Automatic initiated by novel event being
    detected
  • Manual launched by engineer through diagnosis
    workbench
  • Manage provenance data for diagnosis cases
  • Management of secure services
  • Role management
  • Certificate handling
  • Business Workflows
  • Job Assignment and Tracking

11
Workflow System
  • Components for the workflow system have been
    identified
  • Workflow Manager runs workflow instantiations
  • Workflow Generator creates and manages workflows
  • Workflow Advisor advisory system providing
    domain knowledge on how to deploy workflows

12
DAME Services Workflow Architecture
13
Current Progress
  • Workflow Manager has been implemented
  • Workflows captured as Java classes
  • Workflow enactment via apache server hosted at
    the DAME portal
  • Workflow Manager handles secure authorisation
    through management of X509 certificates

14
Workflow Implementation
15
Workflow Implementation
16
Future Work
  • Workflow Generator
  • Dynamic Workflow Generation
  • Means to edit/adapt workflows
  • Means to visualise workflows
  • Would like to adopt existing e-Science technology
  • Development of Workflow Advisor
  • Case Based Reasoning system
  • Uses workflow provenance to build diagnosis case
    histories and capture domain knowledge
  • Richer Security models
  • Authorisation across computing domains
  • Finer grain definition of role and access rights.
  • Dynamic control of virtual organisations
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