Aircraft Auto Pilot Roll Control System

 Aircraft Auto Pilot Roll Control System

Out Lines

qIntroduction

qFlight Control Surfaces

qBlock Diagram

qComponents and functions

qAdvantages

qApplications

Introduction

Autopilot is a system of automatic controls which holds the aircraft on any selected magnetic headin.                                                                         In this project our goal is to control the roll angle of the aircraft in the autopilot system.

                                                                                                                                                   Main flight Control System                                        ØAircraft is controlled by three main surfaces:                                     1)AILERON                                                                                                     2)RUDDER                                                                                                     3)ELEVAT 

                                                                                                                             PURPOSE                                                                                                                   TO ENABLE THE PILOT TO EXERCISE CONTROL OVER THE AIRCRAFT DURING ALLL PORTIONS OF FLIGHT.                                                     

AILERON                                                                    ØThe ailerons are one of three primary flight control surfaces found on aircraft..                                                                                                           ØAileronsare small hinged sections on the outboard portion of a wing.                    ØThey are movable surfaces that control movement about the longitudinal axis--called roll                                                                                                        ØAilerons can be used to generate a rolling motionfor an aircraft

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RUDDER

ØOn the trailing edge of the vertical stabilizer is the Rudder.

ØThis controls the yawor the left/right sliding movements of the aircraft.

ØOn a real aircraft, this is controlled by the foot pedals

ØWhen the pilot pushes the left pedal, the rudder deflects left. Pushing the right pedal causes the rudder to deflect right.

Left/Right(YAW) Motion by Rudder

Elevators

ØThe elevator is on the tail of the aircraft, moving the elevator causes the nose of the aircraft to go up or down, allowing the aircraft to climb or descent..

ØElevators control the up/down motion of aircraft that is called as pitch..

ØWhen the pilot pulls the stick backward, the elevators go up. Pushing the stick forward causes the elevators to go down.

Up/Down(Pitch) motion of aircraft by Elevator 

Block Diagram Of ROLL Angle control of AUTOPILOT Gyro

vThe aircraft roll control provides the components & functions including:

ØController gain

ØAileron actuator

ØAircraft dynamics

ØGyro

Aileron actuator

ØActuatoristhedevicethatcausetheprocesstoprovidetheoutput..     ØSo,theAileronActuatoristhedevicewhichcausethemovementofailerons..

ROLL ANGLE

ØThe ailerons are used to bank the aircraft; to cause one wing tip to move up and the other wing tip to move down..

ØBoth the Ailerons always move in opposite to each other..

ØLowering the aileron on one wing raises the aileron on the other..

ØThe wing with the lowered aileron rises because of its increasel ift ,and the wing with the raised aileron moves downward because of its decreased lift.

ØAngle which is generated by the movement of Ailerons is called as RollAngle .

ØRoll is defined as a rotation abou t the x-axis,orlongitudinal axis,of  a flying vehicle.

Gyro

ØThe  GYROS  (TO  SENSE  WHAT  AIRPLANE  IS  DOING)

ØDirectional  Gyro (Heading  Indicator)  is used in an aircraft to inform the pilot of his heading.

ØThe  Gyro works us in gagyro- scope,tied to the aircraft horizontal..

AirCraft  Dynamics

ØFlight dynamics is the science of air and space vehicle orientation and controlin three dimensions..

ØAirCraft Dynamics uses for determination of the position and velocity of aircraftat some arbitrary time..

Advantages

ØAutopilot system reduce the work strain of pilot..

ØAutopilot roll controlling reduces the fatigue of controlling the aircraft in flight by the pilot.

AirCraft Dynamics

ØFlightdynamicsisthescienceofairandspacevehicleorientationandcontrolinthreedimensions..

ØAirCraftDynamicsusesfordeterminationofthepositionandvelocityofaircraftatsomearbitrarytime..

Applications

•It is used in the auto missiles to control the roll angle..

•It can be used in almost every aircraft for auto pilot controlling..