LECTURE 28. Course:

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LECTURE 28. Course Design of Systems
Structural Approach Dept. Communication
Networks Systems, Faculty of Radioengineering
Cybernetics Moscow Institute of Physics and
Technology (University)
Mark Sh. Levin Inst. for Information
Transmission Problems, RAS
Email mslevin_at_acm.org / mslevin_at_iitp.ru
PLAN 1.Preliminaries life cycle, systems,
utilization, personnel, maintenance,
roles 2.Framework of maintenance process basic
framework, systems under maintenance maintenanc
e operations (inspection as testing/analysis/diagn
osis, repair, replacement) etc. 3.Illustrations
basic analogue (monitoring system), trajectory
of fault.
Nov. 19, 2004
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1.Preliminaries
Utilization Maintenance
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Manufacturing
Testing
Marketing
Recycling
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SYSTEM
PERSONNEL
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1.Preliminaries
Utilization Maintenance
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Manufacturing
Testing
Marketing
Recycling
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UTILIZATION (e.g., driver, pilot, operator)
MAINTENANCE ACTIONS system installation train
ing of personnel regular testing of
personnel planning / scheduling of maintenance
operations execution of operations (inspection,
repair, replacement) analysis of the system,
accumulation of data, prediction
SYSTEM
MAINTENANCE (support of system personnel)
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1.Preliminaries
EXAMPLES
SYSTEM
UTILIZATION MAINTENANCE
1.Car
Driver, passengers Maintenance


personnel 2.Airlane
Pilot, passengers
Maintenance

personnel 3.Human
Human
Doctor, human 4.House
Owner
Maintenance

personnel, owner 5.Computer
User(s)
Maintenance

personnel,

special software,

user(s)
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2.Framework
TYPICAL FAILURE RATE CURVE
Failure rate
Time
Infant mortality
Useful period
Wear out period
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2.Framework
AN ORDINAL SCALE FOR FAULTS 1.OK 2.Small
fault 3.Significant fault 4.Damage (destriction)
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2.Framework
OBJECT UNDER MAINTENANCE 1.System and / or
system part (component, unit) 2.System
state 3.System function or function cluster
(as a group of interrelated functions)
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2.Framework
MAINTENANCE FRAMEWORK (problems) 1.System
analysis / evaluation (systems, its part,
etc.) 2.System prediction 3.Operational
management / preventive maintenance testing
evaluation additional information
repair / replacement 4.Design of information
model for system and each part (object) 5.System
strategy selection of object under
maintenance selection of operation (i.e.,
inspection, repair, replacement) assignment
of time for operation(s) execution of the
operation(s)
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2.Framework
Planning
Analysis, accumulation, processing, integration (f
usion), distribution of information
SYSTEM
Models for system, faults, prediction
Maintenance operations (scanning, repair,
replacement)
MODELS selection, knapsack, routing,
assignment / allocation, etc. probabilistic
models, Markov processes reliability evaluation
/ analysis safety analysis simulation etc.
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2.Framework
SYSTEMS UNDER MAINTENANCE 1.Whole
system 2.Multi-component (modular) system
one-layer modular system hierarchical
(multi-layer) system multi-layer modular
system with complex module interrelation
(including interrelation between different
layers and branches) 3.Developping systems (e.g.,
upgrade of components, structure,
interconnection) 4.Change of external environment
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2.Framework
KINDS OF MAINTENANCE 1.BASIC MAINTENANCE
faults gt operation 2.PREVENTIVE
MAINTENANCE prediction of faults gt
preliminary maintenance operation
3.SELF-MAINTENANCE
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2.Framework
SYSTEM CHARACTERISTICS 1.Reliability
(stability, etc.) 2.Safety 3.Viability,
survivability 4.Robustness 4.Performance
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2.Framework
PROBLEMS MODELS OF PREVENTIVE
MAINTENANCE 1.REVELATION (ALLOCATION) OF TEST
POINTS Models multicriteria selection,
knapsack-like problems, allocation problems,
etc. 2.PLANNING TEST OPERATIONS Models
multicriteria selection, knapsack-like
problems, scheduling, etc.
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2.Framework
MODELING INFORMATION PROCESSING
1.Modeling of faults 2.Diagnosis of
faults 3.Monitoring of faults 4.Tracking of
faults 5.Integration (fusion) of information on
local faults 6.Distribution of information on
faults for various information systems and
specialists
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2.Framework
SYSTEM
SYSTEM LAYERS 1.System 2.System parts (group
of states, group of functions) 3.Components
(state, function)
BASIC ACTIONS 1.Scanning 2.Small repair /
replacement 3.Essencial repair / replacement
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3.Basic analogue Monitoring systems
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SENSORS
Control
Integration (fusion), analysis
ACTUATORS
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Illustration Accumulation of information
System component
SYSTEM
Trajectory of faults (for components)
FAULT/ DAMAGE
Medium fault
Small fault
Small fault
Normal situation

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