Distributed
Diagnostics on
the Grid: DAME
Progress Report
Professor Jim Austin/Tom Jackson
University of York
Project Partners
EPSRC Funded, £3.2 Million, 3 years, commenced Jan 2002.
UK pilot project for e-Science
4 Universities:
– University of York, Dept of Computer Science
– University of Sheffield, Dept of Automatic Control and Systems
Engineering
– University of Oxford, Dept of Engineering Science
– University of Leeds, School of Computing and School of
Mechanical Engineering
Industrial Partners:
– Rolls-Royce
– Data Systems and Solutions
– Cybula Ltd
Distributed Aircraft Maintenance Environment - DAME
Operational Scenario
Engine flight data
London Airport
Airline
office
New York Airport
Grid
Diagnostics Centre
Maintenance Centre
American data center
European data center
Distributed Aircraft Maintenance Environment - DAME
DAME Grid Challenges
Building a demonstration system as proof of concept
for Grid technology in the aerospace diagnostic
domain.
Two primary Grid challenges:
– Management of large, distributed and heterogeneous data
repositories;
– Rapid data mining and analysis of fault data;
Other key (commercial) issues:
– Remote, secure access to flight data and other operational
data and resources;
– Management of distributed users and resources;
– Quality of Service issues (and Service Level Agreements)
Distributed Aircraft Maintenance Environment - DAME
Progress March 2004
Mid term demo completed Aug 2003.
Main thrust since then has been to:
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Develop services
Develop data and services infrastructure
Work on Dependability and Security
System middleware – SLA, workflow engine
Publish papers!
Gain acceptance of commercial users in
technology
Distributed Aircraft Maintenance Environment - DAME
Demonstrator
Fully operational system on the WRG
– Demonstrated the basic system architecture and main
services
Maintenance Engineer
Maintenance Analyst
Toolbench
Distributed Aircraft Maintenance Environment - DAME
Services – Data Management
and Search
Data management and searching is the main
challenge within DAME
– Main aim is to manage >1Tb per year of Aero
Engine vibration and maintenance data.
– A data architecture has been defined based on
Globus and SRB.
– Interlinks with search and reasoning services.
Distributed Aircraft Maintenance Environment - DAME
DAME Data Architecture
Distributed Aircraft Maintenance Environment - DAME
Service - Engine Data Explorer
EDE Data visualisation and search control
• Need to allow users to view and search data
• Built on top of the York/Cybula AURA technology
• Directs search via the DAME data architecture
Distributed Aircraft Maintenance Environment - DAME
Services – Engine Data Explorer
Distributed Aircraft Maintenance Environment - DAME
Services – Engine model
The engine simulation
• Aims to model correct engine operation.
As Grid services:
• GSI enabled secure engine performance simulation
• a number simulation instances generated by the factory
service; different engine simulation can be performed
simultaneously
• Only lightweight computers or PDAs are needed to perform the
engine simulation, while still benefit from highperformance/high-throughput computing power provided by the
Grid
Distributed Aircraft Maintenance Environment - DAME
Services – Engine model
Distributed Aircraft Maintenance Environment - DAME
Services – Case Based
Reasoning
CBR Maintenance Advisor Service
• Integrates fault information and knowledge gained
from fault diagnosis process
• Advises maintenance personnel on appropriate
maintenance action
• Deployed as a Grid service on the Grid
• Accessible by user via a web browser across the
Internet
• Secure access with X.509 user and host
authentication, SSL encryption.
Distributed Aircraft Maintenance Environment - DAME
Services - CBR
Distributed Aircraft Maintenance Environment - DAME
Services – Workflow advisor
Workflow advisor
• Provides workflow advice and workflow scripts for diagnosing
faults based on case history of DAME usage;
• Captures ‘domain expert’ knowledge and offers knowledgebased search across complex workflow information;
• Integrated with CBR system;
• Builds on the research work on provenance data
Distributed Aircraft Maintenance Environment - DAME
Services – Workflow advisor
Interaction
Maintenance Engineers
Domain Experts
DAME
System
Observation
Workflow
Observer
Trace generation
Automated
Workflow
Advisory
Direct
Workflow
Advisory
Workflow
Advisor
Primitive Trace
TR-TR-TR-...
Process Analyser
Process extraction
Process
reuse
Workflow Processes
Process-1
Process-2
…
Process-n
Distributed Aircraft Maintenance Environment - DAME
DAME Provenance
Architecture
Provenance
Database
Provenance Viewer
Workflow Advisor
Workflow Definition
(BPEL)
Workflow
Script
Workflow Manager
Workflow Instance
Workflow Instance
Workflow Instance
Workflow Instance
Workflow Instance
Service Instance
Distributed Aircraft Maintenance Environment - DAME
Services – XTO advisor
• Grid based deployment of the vibration analysis
algorithms
• Provides
– Opportunity for finer grain analysis;
– More powerful algorithms;
– Testing environment for
development of new
algorithms;
• Working on integration of more complex algorithms
for engine modelling based on fusion of performance
and vibration data.
Distributed Aircraft Maintenance Environment - DAME
Services – XTO advisor
Distributed Aircraft Maintenance Environment - DAME
Middleware – Work flow
Manager
Management of services
• Services are managed at the portal
via a Workflow Engine
• Workflow Engine provides
management of manual and
automated workflows.
• Also handles certification
and role management
Distributed Aircraft Maintenance Environment - DAME
Middleware – Work flow
Manager
Browser
Portal
Role
Database
MyProxy
Server
Event
Generator
Engine
Data Store
Workflow
Credential
Workflow
Manager
SDM to
XTO
XTO
Aura-G
CBR
Engine
Model
Broker
Distributed Aircraft Maintenance Environment - DAME
Middleware – Brokerage &
SLA
Brokerage system is used for job allocation on
available Grid resource
• Due to commercial application
domain, broker should also
demonstrate capability to
manage QoS issues, and
specifically Service Level
Agreements (SLA’s)
• Integrates with GGF Grid
Economic Architecture
Distributed Aircraft Maintenance Environment - DAME
Dependability and Security
Contribute to the GRID community dependability
and security studies, where possible.
• Provide dependability and security analysis to
support the ultimate deployment of DAME as a
working engine diagnosis environment.
• If possible, provide a basis (identify good practices)
for dependability and security analysis for the
deployment of DAME as a working diagnosis
environment for other domains e.g. medical.
• Dependability analysis has meant need for business
process analysis, asset identification, risk
identification.
Distributed Aircraft Maintenance Environment - DAME
Commercial take-up
• Rolls-Royce evaluating DAME system in Engine
Pass off testing.
• DS&S and Cybula starting to develop markets for
EDE system and data management system.
Distributed Aircraft Maintenance Environment - DAME
Final Demonstrator
• Final demonstrator will act as a more explicit vehicle
for demonstration of core research activities;
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Distributed Data Management and SRB
Job brokerage
Time-series pattern matching and data-mining
QoS and SLA’s
Security management
Workflow capture and provenance systems
• Will drive studies on business case for commercial
deployment of the DAME system;
Distributed Aircraft Maintenance Environment - DAME
Paul Anuzis (RR)
Georges Honoré (L)
Haydn Thompson (S)
Peter Cowley (RR)
Alison McKay (L)
Rob Davis (Y)
Graham Hesketh (RR)
Sarfraz Nadeem (L)
Martyn Fletcher (Y)
Jack Crawford (RR)
Paul Hayton (O)
Tom Jackson (Y)
Charlie Dibsdale (DS&S)
Lionel Tarassenko (O)
Mark Jessop (Y)
Paul Irving (DS&S)
Simukai Utete (O)
Julian Young (Y)
Peter Lobner (DS&S)
Jeff Allan (S)
Bojian Liang (Y)
Richard Bagshaw (L)
Peter Fleming (S)
John McDermid (Y)
Pete Dawson (L)
V. Kadirkamanathan (S)
Andy Wellings (Y)
Peter Dew (L)
Max Ong (S)
Andy Pasley (Y)
Karim Djemame (L)
Xiaoxu Ren (S)
+ PhDs….
Iain Gourlay (L)
Vernon Bailey (O)
Thanks!
Distributed Aircraft Maintenance Environment - DAME