Title: The Integrated Diagnostic System (IDS): Remote Monitoring and Decision Support for Commercial Aircraft - Putting Theory into Practice
1The Integrated Diagnostic System (IDS) Remote
Monitoring and Decision Support for Commercial
Aircraft - Putting Theory into Practice
- Michael Halasz, Bob Orchard, François Dubé - NRC
Robert Ferland - Air Canada - 1999 AAAI Spring Symposium on AI in Equipment
Maintenance Service and Support - Stanford University, California
- March 23, 1999
2Overview
- motivation
- benefits
- airline operational environment
- IDS
- practical considerations
3Vision - from data to decisions
...to make optimum use of available data,
information, and knowledge across the
organization to improve engine maintenance and
troubleshooting ...July 1992
automated reasoning
4Motivation
- need for systems that help in time critical,
accurate, and consistent decision making - tools to integrate and interpret
- volumes of useful data provided by new generation
equipment - organizations diverse and distributed
information assets - right data, knowledge and expertise at right time
necessary to optimize maintenance mission -
distributed - unscheduled maintenance is persistent
more with less but maximize equipment
utilization
5Motivation
source Statistics Canada 1996
6What can innovative IT do?
maintenance budget
5 - 8
7Focus Line Technician
- aircraft at gate
- passenger offload
- snag recognition
- consult MEL
- consult TSM
- consult aircraft history
- carry out test (BITE)
- fault isolation (TSM)
- parts required?
- order parts
- rectification (AMM)
- certification
35 minutes
8Troubleshooting
engineering
field rep.
maintenance control centre
manuals
parts
- results
- flight cancellation
- unhappy customers
- lost
line / ramp
9IDS Concept
10Functional Architecture
11Simple Example
Time Phase Event Description 130412 take-off NAV
130834 cruise WRN ENG 2 OVSPD PROT
FAULT 130835 cruise FLR HMU (OSG),
J7//EIU2FAD 130914 cruise WRN ENG 2 COMPRESSOR
VANE 131008 cruise FLR VBV ACT, HMU
ENG2A//EIUFADEC 131950 cruise WRN SFCS 132056
cruise FLR FLP LH PROX SNSR 1 37 CVOR LGCIU
1//SFCC 1 132228 cruise FLR L FLP DISC PROX
SNSR 37CV // LGCIU 1 132241 cruise SNG ENG 2
COMP VANE OCCURRED AS PWR ADV TO CLB PWR THRU
17000 FT. 134101 cruise ECR ENGINE CRUISE
REPORT 134221 cruise CPR CRUISE PERFORMANCE
REPORT 134802 cruise FLR ILS-2 NO DATA FROM
CONTROL SOURCE // ILS 2 134808 cruise FLR AFSFM
GC2 //AFS,RMP1,2OR3 134827 cruise FLR AFSILS2
// AFS 135550 cruise FLR DME-1 TRANSCEIVER //
DME 1 135901 cruise ECR ENGINE CRUISE
REPORT 140157 cruise FLR DMC2NO FQI2 DATA //
EIS 2, EIS 1, EIS 3 143723 cruise FLR AFSADIRU1
/2/3 DISAGREE // AFS 1447 cruise snag SEAT COVER
AT 3F NEEDS TO BE CHANGED-COVER
CHANGED 150034 cruise WRN NAV ALTI
DISCREPANCY 150854 cruise FLR CHECK VHF-1
ANTENNA CIRCUIT // VHF 1 152131 at
gate MPF MAINTENANCE POST FLIGHT
REPORT 2252 snag REPLACED MASTER BALLSCREW
ACTUATOR FLEX DRIVESPACER, ENG RUN CARRIED
OUT,ACFT CHECKS SERV
symptom cluster
performance reports
repair
12Practical Considerations
- General
- get right into business justification
- understand end users problems/world
- find appropriate champions (upper management
technical staff) - expect many organizational changes
- iterate frequently with users
- control expectation
- users dont easily express wants/needs
13Practical Considerations
- Technology transfer
- new technologies (AI, OO, )
- infrastructure to deliver distributed real time
application - electronic manual access
- legacy system links
- minimal changes to business practices
- active user participation
- year 2000
14Practical Considerations
- R D goals/balance
- evolutionary process (resist throw away approach)
- be prepared to make significant leap of faith
commitment up front until idea catches on - impact of unresolved issues such as
- automatic case creation (limited access to
personnel) - unsupervised learning techniques (failure
prediction)
15Current Status
- prototype (v2.11) operating at Montreal and
Ottawa (4 sites) since Nov 96 - IDS v3.0 (distributed, component based)
- Air Canada infrastructure issues development
- extend to other aircraft (currently A320/319)
- soliciting requests from companies to fulfill
service provision roles - Aerospace DAta Miner (ADAM) encouraging results,
gt 4 yrs operational data
16Video