AVCS

Question 1

AVCS stands for?

Answer 1

Active vibration control system

Question 2

AVCS job

Answer 2

reduces peak vibratory loads produced by main rotor at the rotor blade passage vibration
Vibrations felt as 4 per revolutions

Question 3

AVCC

Answer 3

active vibration computer

Question 4

Number of accelerometer sensors

Answer 4

10

Question 5

VCAS

Answer 5

Vibration control actuation system
1 VCAS electronics unit
5 force generators

Question 6

How does AVCS function

Answer 6

Closed loop feedback control alggorithm uses accelerometers as sensors and force generators as actuators

Question 7

Nr tachometers job

Answer 7

Provides reference signal to allow AVCS to quickly track changes in rotor speeds

Question 8

Force generators do what?

Answer 8

Inject 4p vibratory force into airframe to counter those produced by the rotor

Question 9

AVCS resets its vibration-nulling solution on a ____ cycle

Answer 9

300 second, 5 minute

Question 10

Caution -BIT shall only be initiated with _______

Answer 10

rotors static to avoid damage to dynamic components

Question 11

Number of vertical accelerometers

Answer 11

8

Question 12

Number of lateral accelerometers

Answer 12

2, one behind pilot, one behind so

Question 13

Force generators

Answer 13

4 pairs 1000 lb (on top of each main mount, behind reeling machine, in tunnel)

1 pair 500 lb between pilots