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evaluated to minimise the opportunities for error, human errors will occur. The defence against this
incident becoming an accident was the use of effective situation awareness by a flight crew. Whilst
the risk of a collision was averted, the incident shows the importance of all crews and controllers
maintaining maximum situational awareness at all times.
No safety recommendations were made as a result of this incident because NATS and Manchester
ATC had already taken appropriate measures to review, standardise and improve their procedures.
The operator of EI-CJI has also undertaken to use the circumstances of this incident as a training aid
for its flight crews.
Hydraulic System Simulation
Delphine HERTENS
T1.1.2 Leader. Hydraulic System Engineer
AIRBUS
VIVACE Forum 2, The Hague, Netherlands
Oct. 24-26, 2006
© 2006 VIVACE Consortium Members. Page: 2 24-26 October 2006
All rights reserved
TITLE OF THE SLIDE
VIVACE FORUM 2
Hydraulic system task context
􀀹 Objectives of the task
– Increase the level of simulation in hydraulic system design
– Increase hydraulic system simulation fidelity to contribute to
design cycle and costs reduction
􀀹 Hydraulic System simulation contributes to the renewal of
the systems development process by providing to flight
controls and handling qualities teams the most realistic
hydraulic model at the earliest
© 2006 VIVACE Consortium Members. Page: 3 24-26 October 2006
All rights reserved
TITLE OF THE SLIDE
VIVACE FORUM 2
Hydraulic system overview
􀀹 Basic function of Aircraft Hydraulic system: to provide required power to
hydraulic consumers which are (mainly):
- Flight control surfaces (ailerons, elevator, rudder, spoilers, flaps…)
- Landing gear systems (extension and retraction, braking, steering…)
- Cargo doors, thrust reversers…
􀀹 Main components of Hydraulic system:
- Pumps
- Valves
- Filters
- Reservoir
- Indicating devices
- Pipes and fittings…
HSMU
RAT
PUMP
ENGINE 1
ENGINE 2
ENGINE 3
ENGINE 4
AILERONS
SPOILERS
AILERONS
SPOILERS
RUDDER
ELEVATOR
ELEVATOR
HYD
SYS
Hydraulic Reservoir
© 2006 VIVACE Consortium Members. Page: 4 24-26 October 2006
All rights reserved
TITLE OF THE SLIDE
VIVACE FORUM 2
Hydraulic system simulation
Iterative work for sizing and
optimisation of:
- Hydraulic system
- Hydraulic consumers
- Flight control laws
HYDRAULIC
SYSTEM
CONSUMERS
Flight control
laws
Handling
quality
A/C behaviour towards
pilot order
© 2006 VIVACE Consortium Members. Page: 5 24-26 October 2006
All rights reserved
TITLE OF THE SLIDE
VIVACE FORUM 2
Hydraulic task scenarios
SCENARIO 1
PRE-DESIGN
MODEL
Scenario
completed
Pre-design
model
􀀹Available early
􀀹Real time
􀀹Integration in flight
control simulation
platforms (multi-systems)
􀀹Base for more complete
models (later)
=>Improve flight control tests cases
fidelity
=>Reduce iterations, and iterations
time between hydraulic system and
flight control laws / handling quality
=>Earlier optimisation of hydraulic
generation
Tool: SCADE
Realistic but nevertheless simple, as required
􀀹System level
􀀹Flight control
laws and
handling quality
specialists use
DELIVERABLE TITLE
by
Author (Company)
Abstract:
This document describes…
Dissemination:
Deliverable/Output n°: Issue n°:
Keywords:
Detailed
model
􀀹Non real time
􀀹Physical dynamic
modelling
􀀹Stand-alone simulation
􀀹Coupled simulation with
flight control simulation
platform (not integrated in
multi-systems simulation
platforms)
=>Improve hydraulic model fidelity
=>Hydraulic system detailed
performances and behaviour
status
=>Earlier system verification and
validation
=>Reduce Iron Bird and flight tests
SCENARIO 2
DETAILED Tool: SABER
MODEL
On-going
work
􀀹System level
􀀹Hyd system
specialists use
More accurate
© 2006 VIVACE Consortium Members. Page: 6 24-26 October 2006
All rights reserved
TITLE OF THE SLIDE
VIVACE FORUM 2
Zoom on scenario 1:
　
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