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Flashcards in Computers In Aviation Deck (10):
1

What is a FCC?

Flight control computer.

A component of automatic control systems that has inputs from A/C control surfaces and engine controls and outputs EICAS and FMS.

2

What is a CPU?

Takes inputs and performs logical or mathematical operations upon them according to a set program in order to produce an output.

3

What components are a CPU made of?

• Control unit - which both fetches and writes info to memory. Also manages the ACU.

• Arithmetic Logic Unit (ACU) - actually performs the operations as commanded by the control unit.

• Memory - programmes are generally found in ROM (Read only memory). Outputs are generally to RAM (Read and write memory)

4

Unlike desktop machines, avionic computers don't use hard drives for storing info because?

The harsh aviation environment, because the desktop machines are not reliable enough for critical computer operations.

5

What is volatile memory?

e.g. RAM

Only holds info while there is a constant pwr supply maintained

6

What is non volatile memory?

E.g. ROM

Continues to store info even when pwr is off.

7

What is multi processing?

Multiple CPUs working together is multi processing.

8

What is multi processing?

Each CPU can multi process, where it is simultaneously carrying out several tasks

9

What are the inputs and outputs for a CPU?

Inputs:
Keypad on CDU, sensors, digital outputs from IRS, Rad Alt etc.



Outputs:
EFIS
FMS
CDU

10

What are continuous BITE checks?

Built in test equipment.

Each LRU runs its own continuous BITE check and if it detects an error, it will record it for later download or sent it to a central maintenance computer.