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slow, and the voice command
system increases overall effectiveness:
the pilot does not
have to look into the cockpit any
more. That enables him to focus
on the mission and on systems
operation.»
Developing such an advanced
tool was a challenge since the
various speech recognition
algorithms had to cope with
the noises of the cockpit environment
as well as with the
stress and the high g-loads
that can affect pilots’ voice.
But Dassault and Thales engineers
overcame all hurdles,
and two production Rafales,
two-seaters B301 and B302,
are currently equipped with
the direct voice input system.
«These two aircraft allow us
to push development even further
», says Philippe Rebourg.
«Numerous foreign test pilots
have evaluated the system,
and they all praise its efficiency:
word recognition rates
are better than 95 percent,
and, depending on the customer’s
requirements, the system
boasts a vocabulary of between
50 and 300 words. The
response time is extremely
short (less than 200 ms), and
critical voice command selections
are confirmed by visual
feedback.» Display management,
navigation tasking and
mode switching are even
quicker. A typical example is
radio and navigation aids
selection: a single pressure
on a button on the throttle activates
the voice input system,
and, with chosen code words,
the pilot can instantly reprogram
the flight-plan or select
various autopilot modes or
radio/IFF frequencies.
«As an added bonus, the voice
command system proves also
extremely useful by reducing
high pilot workload during
emergency situations», says
Gérard Dailloux, Dassault
Flight Safety Vice-President.
The direct voice input system
will be available on export
R a f a l e B l o c k 0 5 s , a n d ,
although Dassault has mainly
concentrated on the Rafale so
far, it could be adopted at
some stage on the Mirage
2000-5 Mk2 and on the future
Falcon 7X long-range business
jet, helping reduce cost by
increasing series production.
FOXTHREE
GIE - Rafale International
78, quai Marcel Dassault 92552 Saint-Cloud cedex 300 - France
www.dassault-aviation.com
www.snecma.com
www.thalesgroup.com
PEMA 2b - Photos F. Robineau - Dassault Aviation - Alain Ernoult - aeropicture.com - Christian Boisselon.
􀀄􀀊
Client Study: Flight Refuelling Limited
Flight Refuelling Limited
Flight Refuelling Limited (FRL) and
sister company Sargent Fletcher Inc,
form Cobham Air Refuelling &
Auxiliary Mission Equipment
Division. The division has over 50
years experience as a specialist
providers of systems and services to
world aerospace and defence
markets.
Founded in 1934, FRL was created
to develop and test aerial refuelling
concepts. FRL is today a £100m
business, and a substantial part of
the £1billion Cobham business.
FRL specialises in the design, test
and manufacture of state-of-the-art
aircraft Auxiliary Mission Equipment,
Marine Products, Air Traffic Control
Systems, and has developed the
most technologically advanced
Aerial Refuelling Systems in the
world. With its unparalleled
reputation for quality, reliability and
after sales service, it offers first class
support throughout the lifecycle of
all its products.
FRL’s customers include Airbus,
Boeing, EADS, Lockheed Martin,
SAAB and the World's Military
Forces.
.
The challenge
In 1987 Flight Refuelling Limited (FRL) commenced a major redevelopment
of its air refuelling system for the USAF-KC10A tanker
aircraft.
In order to improve the flexibility of the system, and allow it to be easily
tailored to meet the needs of other airforces and aircraft, FRL decided to
implement the world's first microprocessor controlled air refuelling
system.
FRL itself lacked the necessary experience to develop safety-critical
software, which would be subject to FAA approval, and so selected IPL as
a software development partner.
The solution
The refuelling system consists of two main elements; a Refuelling Pod
Controller and a Control Panel, both based around 8031
microcontrollers. The Refuelling Pod Controller handles the trailing and
rewinding of the hose and regulates fuel flow and pressure during
refuelling operations. The control panel allows the operator to control the
pod and provides feedback on refuelling progress and pod operation.
　
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