Autopilot

Question 1

The difference between a closed and open loop system?

Answer 1

A closed loop system provides feedback

Question 2

Outer loop systems are those extra facilities offered e.g. -

Answer 2

Altitude Hold, Heading Hold, LNAV, VNAV

Question 3

When engaged in the pitch hold mode, the autopilot uses data issued by the:

A
Inertial vertical speed indicator (IVSI)

B
ADC

C
Flight management computer (FMC)

D
attitude reference system

Answer 3

D

attitude reference system

Question 4

Stabilization: The autopilot basic function is stabilization around its CG.

Guidance: Monitoring the movement of the CG in space (navigation)

Stability (inner loop):

· pitch (pitch attitude hold)

· roll (roll attitude hold/ horizontal wing hold)

· yaw

· all about 3 axis that pass through the CG (any movement of stability function will pass through CG)

· Basic functions:

o heading hold

o height hold

Guidance (outer loop):

· navigation

· altitude hold

· climb

· descent

· controlling the path of the aircraft

· IAS or Mach number holding

· VOR axis holding (radial/course tracking)

· movement of the aircraft through space (any movement by the guidance function = movement of the CG/aircraft itself in three dimensions of space)

Question 5

Guidance (outer loop):

Answer 5

· navigation

· altitude hold

· climb

· descent

· controlling the path of the aircraft

· IAS or Mach number holding

· VOR axis holding (radial/course tracking)

· movement of the aircraft through space (any movement by the guidance function = movement of the CG/aircraft itself in three dimensions of space)

Question 6

Stability (inner loop):

Answer 6

· pitch (pitch attitude hold)

· roll (roll attitude hold/ horizontal wing hold)

· yaw

· all about 3 axis that pass through the CG (any movement of stability function will pass through CG)

· Basic functions:

o heading hold

o height hold

Question 7

synchronisation prevents snatch on -

Answer 7

Engagement of the autopilot