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2
50
Single Aisle Long Range A380
Average CPU load 1 30
(models & exchanged data)
Number of models 30 100
AIRBUS France - Simulation Industry and Software Departments - SVA September 2009 Page 24
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
Simulator and Aircraft Program Timeline
Evolution level:
Linux Market Technology
1985:
A320
1989:
A330-A340
2002:
A380
1998:
A340-500/600
2005:
A400M
2008:
A350
AIRBUS France - Simulation Industry and Software Departments - SVA September 2009 Page 25
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
2008 Simulator Complexity
SIMULATED WORLD
Simulation Application
•Natural flight loop
•Systems
•Environment
•Engine
•Structure Flexibility Model
AIRCRAFT WORLD
A429
Digital
Analog
CAN
AFDX
Simulation 40 ms
10 ms
80 ms 10 ms
8 ms
RT jit < 50 micro
Modelling complexity
40 ms
10 ms
Simulation Application
•Simulated Actuators
•Remote Flight control
AIRBUS France - Simulation Industry and Software Departments - SVA September 2009 Page 26
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
Need to Simulate the Simulator
AIRBUS France - Simulation Industry and Software Departments - SVA September 2009 Page 27
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
Simulation Software Product
Computing Infrastructure
Middleware Platform Abstraction Layer COTS Software
Supporting Libraries
Host Machine
Server Hardware
Operating System
Simulation Application
Simulation Framework
Simulation model tasks services
External Host Communication Hardware
Simulator High Level Structure
AIRBUS France - Simulation Industry and Software Departments - SVA September 2009 Page 28
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
Architecture Path
Host architecture path to monitor:
• To memory: system bus
• To other processors: hyper transport
• To I/O chipset: hyper transport
• To I/O board: PCI bus
• To network: Ethernet
PCI
bus Ethernet
I/O Chipset
AIRBUS France - Simulation Industry and Software Departments - SVA September 2009 Page 29
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
HW & SW Performance Simulation
The aircraft simulation application uses a modeling language, such as AADL,
to model :
• The Simulation application software structure
• The Simulation application hardware platform and infrastructure
Scheduler
Environment
(Cheddar)
Hardware
Model
.
System Modeled: AADL Architecture Analysis and Design Language
. .
.
System Schedulable
Performance Estimate
SW
Model
AIRBUS France - Simulation Industry and Software Departments - SVA September 2009 Page 30
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
Producer-consumer Paradigm
• Producer – Consumer Paradigm is used modeling both HW and SW behavior
• R/W requests to the dataflow can be converted to transaction tasks
• I/O requests to the dataflow can be converted to transaction tasks
• Transaction tasks are scheduled by the producer-scheduler
• Producer-Scheduler represent the bus used: hypertransport for dataflow accesses, PCI for I/O accesses
• The same paradigm can be used to model outer rings of the communication such as Internet
Request for CPU
Transaction Task #1.1
Request for R/W
Transaction Task #1.2
Request for I/O
Transaction Task #1.3
Request for CPU
Transaction Task #1.1
Request for R/W
Transaction Task #1.2
Request for I/O
Transaction Task #1.3
Producer-Scheduler
CPU
Producer-Scheduler
R/W Mem
Producer-Scheduler
I/O
Simulation Model Task
Consumer #1
CPU
Load
R/W
Mem
I/O
Access
Simulation Model Task
Consumer #2
CPU
Load
R/W
Mem
I/O
Access
CPU
Load
R/W
Mem
I/O
Access
Request for CPU
Transaction Task #1.1
Request for R/W
Transaction Task #1.2
Request for I/O
Transaction Task #1.3
•Valliidattiion Campaiign
•Toolls
Simulation Model Task
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