travelling through time in aid of sustainability by prof farzad khosrowshahi
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Travelling Through Time
in aid of Sustainability:
Building Design &
Maintenance SystemProfessor Farzad Khosrowshahi27 October 2010
• Maintenance on failure
• Preventative planned maintenance
• Time-based maintenance
Building Maintenance
Generations
• Too soon: uneconomical
• Too late: Poor service
Promise
. Building Maintenance Scheduling
. IDEAL (2) - Alternative Design Solutions
• Life cycle evaluation
• sustainability
Ideal (1): - Just-in-time maintenance
- live through it twice - virtual
Visualisation of Building.2D, 3D, animation, VR
4D Visualisation.In time
Visualisation through time.
Visualisation of the degradation of an object like a building:
application in maintenance
Building Visualisation Generations
Traditionally
Architect
Produce
building outline design
Client briefing:
Define functional and strategic needs
Building
Component Selection for
lifecycle,
sustainability,
energy.
Define Project
Environment(climate, usage,
locality)
Long Term &
Periodical
maintenance scheduling
Construction
Phase
Use to design for lifecycle and generate repair & maintenance program
Lifecycle engine
(knowledge-based
OR visual-based)
Proposed
Visual Building
Design
Information
Maintenance
Scheduler
Items Gen Properties
Building Design
Components AnalysisProperties of
Items in Building
Design
Maintenance
Scheduler Analysis
Visual User Interface
Eg. VRML Browser
Cad output
(convert to XML)
contains all building
details
’Items’ attributes
and properties.
Maintenance time period
and type of maintenance..
Default properties of
each standard ‘item’.
Produce a map of building ‘items’
and assign the suitable properties
to each one based on project initials.
Calculate building maintenance
procedure for the given time and
for the given scheduler.
Add building visual data
and calculated data for the given
time and maintenance scheduler
and produce output VUI
Architectural
DesignBuilding
Components
Maintenance
Schedule
Generation
Visualisation
Simulator
Maintenance
Scheduler
Simulator
Maintenance
Program
Virtual
Reality
Output
Architectural
Design
Building
Components
Maintenance
Scheduler
Generation
Visualisation
Simulator
Maintenance
Scheduler
Simulator
Maintenance
Program
Virtual
Reality
Output
Program from visualisation
Visualise the program
Development Process
Event-Effect relationship model
Events: list, agentsComponent: list, elements, time related variables
Event / Component interactionAuxiliary events
Maintenance scheduling expert system
Data generation: collect, generate, knowledge conceptualisation, mobilisation
Data Validation: case based , multi-modal
Event-effect modelling / database design
Product Development (software); interface design, web-based
Visualisation; VUI
Automate the maintenance decisions
LIFE CYCLE SIMULATIONLIFE CYCLE SIMULATIONLIFE CYCLE SIMULATIONLIFE CYCLE SIMULATIONLIFE CYCLE SIMULATIONLIFE CYCLE SIMULATIONLIFE CYCLE SIMULATIONLIFE CYCLE SIMULATION
Generalised life span modelGeneralised life span modelGeneralised life span modelGeneralised life span modelGeneralised life span modelGeneralised life span modelGeneralised life span modelGeneralised life span model
Time
Dead
Components
T1T2
A β PDF represent the lifetime
If pi(tj)<=RND(tj) then “Item i is broken at the tj”
LifeAge
Dirt
&
Dust
Usage
rate
Room
Temperature
Voltage
Generalised status algorithm.Generalised status algorithm.Generalised status algorithm.Generalised status algorithm.Generalised status algorithm.Generalised status algorithm.Generalised status algorithm.Generalised status algorithm.
Color of Component I at the time T
Red =Initial_Red_Colour*PDF_FNr(I,T)
*MaintenanceFactor;
Green=Initial_Green_Colour*PDF_FNg(I,T)
* MaintenanceFactor;
Blue =Initial_Blue_Colour*PDF_FNb(I,T)
* MaintenanceFactor;
End of Colour calculation.
Example life span algorithm for Example life span algorithm for Example life span algorithm for Example life span algorithm for Example life span algorithm for Example life span algorithm for Example life span algorithm for Example life span algorithm for
general light source.general light source.general light source.general light source.general light source.general light source.general light source.general light source.
Lumens of lamp I at the time T
Red_Lumens = Initial_Red_Lumen *
PDF_FNr(I,T) * Dust_Factor;
Green_Lumen= Initial_Green_Lumen *
PDF_FNg(I,T) * Dust_Factor;
Blue_Lumen = Initial_Blue_Lumen *
PDF_FNb(I,T) * Dust_Factor;
The_Lamp_Lit_Colour = RGB(Red_Lumens,
Green_Lumens, Blue_Lumens);
End of Lumens calculation.
Death status of lamp I at the time T
Probability_of_Death = PDF_FNd(I,T) *
Environment function based on
Maintenance factor (I);
if Probability_of_Death >= RND(I,T) then
Bulb is in broken state;
Else
Bulb is not in Broken State;
End of lamp death status.
Example of a bedroom before light Example of a bedroom before light Example of a bedroom before light Example of a bedroom before light Example of a bedroom before light Example of a bedroom before light Example of a bedroom before light Example of a bedroom before light
manipulation.manipulation.manipulation.manipulation.manipulation.manipulation.manipulation.manipulation.
Example of a bedroom after Example of a bedroom after Example of a bedroom after Example of a bedroom after Example of a bedroom after Example of a bedroom after Example of a bedroom after Example of a bedroom after
supervised light manipulation.supervised light manipulation.supervised light manipulation.supervised light manipulation.supervised light manipulation.supervised light manipulation.supervised light manipulation.supervised light manipulation.
Changes due to
lamps’ death.
General reduction
in lumens due to
dust factor and
lamp’s age.
EVENT-EFFECT MODELING
- CHELLENGE
Events-Effects
Event
Rain
Component
Cladding
Act on Effect
corrosion
� EVENTS: many and diverse
� Soft / Hard
� COMPONENTS (internal / external / outside): many choices
� Identify all variables that inflict degradation
� Define time-related visual attributes
�
� EVENT & EFFECT MODEL – linear
� Identify list of effects and associate with components� Develop data structure for each component – effect of time
� Require conceptualisation
� INTERRELATIONS – chain events
� scenarios / cases
� EVENT SIMULATION
� Identification of event situations
� Heuristic rules for frequency and intensity of events
Maintenance & Repair Complexity
Events:Rain, Wear,
temperature, people,
air movement, long-
wave radiation,
chemical attack,
biological attack, fire,
man-made disaster,
natural disaster.
Effect:Colour rendition, surface texture, shape,
mortality, erosion, corrosion, loosing
reflective, absorption and transmission
properties.
LEVEL 2
. Wall finishes
. Floor finishes
. Ceiling finish
. Sanitary appliances
. Services equipment
. Disposal installation
. Water installation
. Heating, Air & Vent.
. Electrical installation
. Gas installation
. Lift/Convey instal'n
. Communication
instal'n. etc.
LEVEL 1: COMPONENTS.Substructure
.Superstructure
.Internal FinishFitting &
Furnishing.Services
.External Works
.Etc…
LEVEL 3. Wall cover
. Doors
. Windows
. etc.
LEVEL 4. fixture
. handle
. etc.
LEVEL n. etc.
Component Aggregation Levels
Events-Effects – modeling
Event
Rain
Component
Cladding
Act on Effect
corrosion
Agents water
rain
steel
cladding
Events
Corrosion
Effects
Elements
Components
Events-Effects Relational Model
Short-circuited?
PVC
popu
tionwater water
pollution
water
acid
Active AgentsAgents Auxiliary Agents
Example: Agent-water plus Agent-pollution = Active Agent-acid
Combined effect of two or more Agents
Combined effect of two or more Events
Example: Event-rain plus Event- vandalism-x = Active link to
Component-Cladding-Element-Steel
popu
tionrain cladding
plastic
steel
cladding
ComponentsEvents Auxiliary Events
Rain/vandel
Extended model of Events-Effects
water
rain
steel
cladding
Agents
Events
Corrosion
Effects
Elements
Components
auxiliary
auxiliary
Probes
Functions
Yes / nochainEFFEC
TCorrosion
EVENTEVENT
EVENT
Component
INTELIGENT OBJECTS
- construction & engineering
- facilities management
- environmental science
- materials science
- mechanical engineering
- meteorology
- physics
- chemistry
- management – risk, project, safety, etc..
- architecture
- maths & stats, simulation & modelling
- computer science
- visualisation
- maintenance programming & scheduling
- energy conservation
- geologist
- psychologists
- sociologist
- time geography
- anthropology
- etc.
OTHER CHELLENGES;
Holistic Nature - Several Expertise
- anthropology
BEHAVIOURAL PATTERNSeg. Degradation of Flooring Systems
[Visualisation of Impact of time on internal flooring]
1- Pattern of usage
2- Visualisation of degradation
There are two methods for analysing human spatial behaviour:
- Activity system (Chapin, S., 1968); is primarily
concerned with the organisation of the sequence of
activities taking place in a setting.
- Behaviour Settings (Barker, R., 1968); concerned
with the relationship between the setting and a
recurring pattern of behaviour. [anthropology]
CentreKeep distance
5 0 5 100
0.2
0.40.398947
9.13483e-012
a( )x
b( )x
c( )x
8-5 x
5 0 5 100
0.2
0.4
0.60.415847
8.64717e-010
g( )x
8-5 x
dyy
yxfxg
j
iy
∫=
=),(
)(
The presentation of probability of appearance of
n creatures in a long room (Corridor)
with one entry (Door).
The presentation of appearance of
n creatures in a long room (Corridor)
with two entries (Doors).
Unused Carpet Texture
Used Carpet Texture
ANTI-ANTHROPY
Clients
s
t
a
n
d
a
r
d
s
Input DataOutput Knowledge
(tailored)
Wider
Dissemination
Wider Exploitation
-Popularize ~music
FINAL PRODUCT: ‘universal’ Web-based Design & Maintenance knowledge Broker
Designers
Maintenance manager
Financiers/Insurers
Public authorities
Community
Pressure Groups
Web – HOLMES
Knowledge Broker
ManufacturersResearchersHOLMES
Phase1 : Initial population
Phase 2: Promotion&PublicityPhase 3: Data volunteers
General Public
Etc.
END