Dame a distributed diagnostics environment for maintenance
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DAME: A Distributed Diagnostics Environment for Maintenance. Duncan Russell University of Leeds. 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

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Presentation Transcript

Project partners
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


Operational Scenario

Engine flight data

London Airport

Airline office

New York Airport

Grid

Diagnostics Centre

Maintenance Centre

American data center

European data center


Dame grid challenges
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


Dame architectural overview
DAME Architectural Overview

DAME Diagnostics

Portal

...

Modelling/

Case Based

Decision

QUOTE

Simulation

Reasoning

Grid Services Management

Support

Novel

Data

The Grid

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Matches

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AURA

Vibration

Shaft Speed

Fuel Flow

Software

Hardware

Cluster

AURA

AURA

AURA




Specifying workflow
Specifying Workflow

Workflow instances are specified through UML sequence diagrams.


Specifying workflow1
Specifying Workflow

Business workflows as Activity Diagrams


Workflow requirements
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


Workflow system
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



Current progress
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




Future work
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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