Transcript Integrated Diagnostic System (IDS)

National Research
Council Canada
Conseil national
de recherches Canada
Institute for
Information Technology
Institut de technologie
de l'information
The 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
Overview
•
•
•
•
•
motivation
benefits
airline operational environment
IDS
practical considerations
Vision - 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
accurate diagnosis
(what, how?)
aircraft
accurate prognosis
(what, how, when?)
repair management
(planning, scheduling)
...November 1993
Motivation
• 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
• organization’s 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”
Motivation
Total
Pipelines
Gas Distribution
Electric Power
Telecom Carriers
0
Public Passenger Transit
10
20
30
$ Billions
Truck Transport
Railway Transport
Air Transport
Manufacturing
Mining/Quarrying/Oil Wells
Forestry and Logging
0
2
repair
capital
source: Statistics Canada 1996
4
6
8
10
$ Billions
12
14
16
What can innovative IT do?
2 - 4%
maintenance budget
5 - 8%
Focus: Line
Technician
35 minutes
• 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
Troubleshooting
engineering
field
rep.
maintenance
control centre
manuals
results:
- flight cancellation
- unhappy customers
- lost $$$
parts
line / ramp
IDS Concept
know the fault
decision made
ready to fix a/c
engineering
electronic
manuals
manufacturer rep.
IDS
SOC
MCC
parts
Functional Architecture
reactive
distributed data &
knowledge sources
IDS
local databases
case-bases
interfaces
- system
- user
learning
algorithms
language
interpretation
knowledgebases
trigger
proactive
situational
Simple
Example
Time
13:04:12
13:08:34
13:08:35
13:09:14
13:10:08
13:19:50
13:20:56
13:22:28
13:22:41
Phase
take-off
cruise
cruise
cruise
cruise
cruise
cruise
cruise
cruise
Event
NAV
WRN
FLR
WRN
FLR
WRN
FLR
FLR
SNG
13:41:01
13:42:21
13:48:02
13:48:08
13:48:27
13:55:50
13:59:01
14:01:57
14:37:23
14:47
15:00:34
15:08:54
15:21:31
22:52
cruise
cruise
cruise
cruise
cruise
cruise
cruise
cruise
cruise
cruise
cruise
cruise
at gate
snag
ECR
CPR
FLR
FLR
FLR
FLR
ECR
FLR
FLR
snag
WRN
FLR
MPF
Description
ENG 2 OVSPD PROT FAULT
symptom cluster
HMU (OSG), J7//EIU2FAD
ENG 2 COMPRESSOR VANE
VBV ACT, HMU ENG2A//EIUFADEC
SFCS
FLP LH PROX SNSR 1 37 CVOR LGCIU 1//SFCC 1
L FLP DISC PROX SNSR 37CV // LGCIU 1
ENG 2 COMP VANE OCCURRED AS PWR ADV TO CLB PWR THRU
17000 FT.
ENGINE CRUISE REPORT
CRUISE PERFORMANCE REPORT
ILS-2 NO DATA FROM CONTROL SOURCE // ILS 2
AFS:FMGC2 //AFS,RMP1,2OR3
AFS:ILS2 // AFS
DME-1 TRANSCEIVER // DME 1
performance reports
ENGINE CRUISE REPORT
DMC2:NO FQI2 DATA // EIS 2, EIS 1, EIS 3
AFS:ADIRU1/2/3 DISAGREE // AFS
SEAT COVER AT 3F NEEDS TO BE CHANGED-COVER CHANGED
NAV ALTI DISCREPANCY
CHECK VHF-1 ANTENNA CIRCUIT // VHF 1
repair
MAINTENANCE POST FLIGHT REPORT
REPLACED MASTER BALLSCREW ACTUATOR FLEX DRIVE&SPACER,
ENG RUN CARRIED OUT,ACFT CHECKS SERV
Practical Considerations
General
• get right into business justification
• understand end user’s problems/world
• find appropriate champions (upper
management & technical staff)
• expect many organizational changes
• iterate frequently with users
• control expectation
• users don’t easily express wants/needs
Practical 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
Practical 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)
Current 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, > 4 yrs operational data
Video