5.1-5.6 Flashcards
What is an EIDS
Electrical instrument display system
What is an EFIS
Electronic Flight instrument system
What are the advantages of EIDS and EFIS
- Variety
- Coloured Displays
- important data (accentuated) unimportant data (suppresses)
- fewer components
- all EFIS monitors are the same
- interchangeable
How do all modern aircraft use digital technology?
- calculations in the system are made by CPU’s
- electronic units are connected by Digital buses
- pilot selected push button commands are processor controlled
What required data is transmitted digitally by the ARINC 429 bus?
Via display data buses to the cpu controller crt or lcd
Via digital buses to a printer
In digital form to a radio transmitter
What is a CPU
Microprocessor. Central processing unit.
It performs all the mathematical and logical functions of manipulating data in memory.
What is An I/o
Input / output device.
They provide the interface between the microprocessor and the outside world.
What are the 3 types of busses and what do they do
Data bus: carry data associated with memory or input/output transfer.
Address bus: specify the memory location or input/output port.
Control bus: various control lines generated by the CPU
What is hardware?
All parts and devices used to process digital data
What is software
All programmes and instructions for the CPU
What is the purpose for the memory section?
To programme steps and data that just be stored and recalled at the appropriate time in order for a computer to Perform it’s fiction
What is RAM
Volatile memory.
Any unsaved data is loft at power off.
Ram is used to store data which changes during the operation of the computer. E.g. calculations.
What is ROM
Non volatile memory.
No data is lost at power off.
It is used to store programme steps and constant values.
Contents of ROM cannot be changed after manufacturing.
What are the other types of ROM
PROM.
• EPROM (Erasable programmable read only memory)
•EAROM (electrically alterable read only memory)
What is EPROM
Altered by erasing the existing programme through the integrated circuit pack. Done by exposing Uv light through a window in the cover.
The elements are then programmed with an appropriate series of logic 1’s and 0’s
What is EAROM
It has the advantage over EPROM that each individual element of the memory can be changed without erasing all data
What are the 5 types of computer?
Control Reference Interactive Storage Information
What’s a reference computer?
A computer that may be used as a source of information or data is referred.
An example of a reference computer?
Inertial reference system (IRS)
Is a laser gyro and an accelerometer.
What are information computers
Computers that collect data form various places, process it and formats it for display. Main task is to collect and display data.
What’s an example of an information computer
EICAS
Engine indication and crew alerting system
What is a storage computer
Retains information provided to them by other systems and computers
What is an example of a storage computer
EECM (electronic engine control monitor)
Stores all the fault data from the EEC
What happens when an EEC system indicates a failures
The maintenance personnel can recall the faults from the EECM to determine what maintenance action needs to be competed
What’s a controlling computer?
A computer with the primary task of controlling something. One of the largest categories of computers.
What’s an example of a controlling computer?
Flap / Slat Electronic Unit (FSEU)
Which monitors the flap lever position and controlling the flap position on the wings
How does an FSEU control flaps
Utilising information from other systems
What’s an interactive computer?
Display information to the operator and then manipulate data based on the interaction between the operator and the computer.
An example of an interactive computer?
FMC (flight management computer) it calculated optimum cost profiles
