Autopilot

Question 1

Control loops

Answer 1

~the inner closed loop is stability system,detetcs attitude disturbance and correct to them
~outer loop,provides info to innner loop to allow it to make changes to altitude and heating

Answer 2

Closed loop : where feedback from an action or state is compared to the desired action or state

Open loop : where there is no feedback loop

Answer 3

One inner loops for each axes

Question 4

Outer loop inputs

Answer 4

~airspeed
~mach number
~vertical speed
~heading
~radio navigation data
~ILS data
~IRS data

Question 5

Oscillations

Question 6

Single axis system

Answer 6

Single channel a/p ,roll control only (1axes)
Wing leveller system

Question 7

Two axis system

Answer 7

Contrl pitch and roll
One channel for elevator and one for ailerons

Question 8

Three axis

Answer 8

~the picth and roll controll channels are the prumary channels
~rudder channels works in unison with the roll channel to enable coordinated turns
~fed wiht info from the AFDS MCP and the FMS
~a 3axis autpilot has 3 inner loops (pitch ,roll and yaw) and 2 outer loops (pitch and roll)

A 3 AXIS AUTOPILOT CAN:
~capture and hold alt,heading ,vertical speed and speed
~capture vor ,ils ,g/s
~fly an autoland
~vetivcal and lateral profiles from the fmc

Question 9

Autopilot sys components

Answer 9

Mode contrl panel(mcp)
Flight mode annunciator
Autopilot computer
Actuators

Answer 10

Primary flight contrls moved by servomotors
Input is singlaled electricallzu but the actuator is moved hyd
There is a risk of exscessive contrl inputs due to lack of aerodynamics feedback in the contorl

Answer 11

~parallel : the actuator moves the cpntrol surface but also supplies feedback to the contrl column to allow it to move whiist under autopilot

~series; the actuator moves the contorl surface ,but not the control coloumn whilst under autpilit

Question 12

Ap systemt inputs

Answer 12

~attitude
~flight patch
~control surface positoin
~air speed
~air data
~a/c config
~mcp selections
~control surfaces
~fma

Question 13

Ap failure

Answer 13

~failure of an AP components or its power supply
~faalure of an a/c sys resulting on loss of a critacal to the ap
~malfuncition of the sensors or sys corruption
~

Question 14

Lnav

Answer 14

If within 3nm and the heading is in the direction of the ttrack the a/c will automatically capture the fligh route

If outside the 3nm ditance ,crew must intercept the track with 90 degrees

Question 15

VOR station

Answer 15

Over the station senwing ciruciuit cut out signals when the VOR cone of silence

Question 16

Cws (control wheel steering)

Answer 16

This mode allows the roll or pitch while a/p is engaged

Question 17

Csw

Answer 17

When csw is engaged the authrotole should not be engaged .

Question 18

Touch control steering

Answer 18

It is selceted by pressing and holding a button on the control coloum
~ap remians engegd but the ap is disc from the actuators

Question 19

Reversion

Answer 19

~automatic disengaging of a mode for one of the following reasons:
~require data for the mode is no longer availble
~a parametere is changed
~mode mismanegment

Question 20

Vor flight mode3s

Answer 20

~compare current radial with the required radial
Determines:
~distance from facility
~rate pf change of radial
~direction of turn
~magnitude of turn
!approprite bank angle

Question 21

Lnav

Question 22

Vnav take off

Answer 22

Wroks differently in different phase of flight
~safety speed is the critcal factor
~vnav manitains the most economical climb
~

Question 23

Airbus autoflight

Answer 23

~managed&raquo_space;WHEN THE AUTPOLIT IS FOLLOWINF THE FMC PROFILE
~SELDCETED&raquo_space;WHERN THE AP FOLLOWS THE PILOT FCU SELCTION