FLY BY WIRE

PRESENTED BY ASWIN MK Roll No : 28

CONTENTS• Introduction

• What is Fly By Wire and how does it work?.

• Why do we need FBW?.

• Disadvantages

• Where do we use it?.

• Future Developments

• Conclusion

• Reference

INTRODUCTION Introduced By NASA in the1970’s.

FBW was first developed for military aviation and

later came in to civil aviation.

Initially FBW was analogue and later developed in to

Digital(DFBW).

The supersonic Concorde was the first civil aircraft to

have an analogue Fly By Wire system.

Eurofighter Typhoon (Digital FBW)

Concorde (Analog FBW)

What is FBW?. It is a flight control system in which the control actions are

transmitted by wire.

The control parameters are carefully developed and validated in

order to produce maximum operational effect without

compromising safety and reliability.

This technology is designed to overcome the limitations of the

existing mechanical and hydro-mechanical flight control system.

How does it work?. The concept uses a highly reliable computer and electronic

flight control system, rather than the conventional

mechanical or hydraulic-based systems, to stabilize and

maneuver an aircraft.

The computers “read” position and force inputs from the

pilot’s controls and aircraft sensors.

Computers solve differential equations to determine the

appropriate command signals that move the Control surfaces

to carry out the intentions of the pilot.

Control Surfaces In A Modern Aircraft

Why do we need it?. Flight envelope protection.

Increase in stability and handling qualities( Possibility of flying

unstable machines).

Turbulence suppression and consequent decrease in fatigue

loads (increased passenger comfort).

Weight and maintenance and overall cost reduction.

Reduction in pilot training cost(easier to fly and easier to

integrate autopilot facility ).

Disadvantages There is no Manual Override if there is a malfunction

of the computer. There is no mechanical feedback to the pilot.

The impacts of these disadvantages is minimal because A. Computer systems used in FBW has proved highly

reliable and safe operation.B. Manufacturers have developed springs and linkages

which are computer controlled and give the pilots the same feel as a conventional aircraft.

NASA Space shuttle

Used in civil aircrafts like Boeing 777 and

Airbus A320, Airbus A380 etc.

UAV’s and Stealth Helicopter (Comanche)

Used in the military for Advanced Fifth Generation

Fighters(F22-Raptor) and Bombers(B2).

Where do we use it?.

MORDERN AIRCRAFT USING THE DIGITAL FLY BY WIRE TECHNOLOGY

Future developments Two new developments in the FBW will be

Fly By Wireless and

Fly By Optics

There are many derivatives of this technology in the automobile

sector

Steer By Wire(NISSAN)

Brake By Wire(BREMBO-F1)

Drive By Wire

ConclusionFly By Wire is an extremely safe and reliable

technology which can be embraced. It is one of

the greatest breakthrough in the aviation history.

It has good scope of improvement over the

coming years and is definitely worth investing.

ReferenceWebsites www.ieeecss.org

www.wikipedia.org

www.nasa.gov

www.airbus.com

Books David F.Anderson & Scott Eberhardt - Understanding Flight

THANK YOU