Avionic Display Systems

[TheChronicScribbler]

I have an assignement to do on avionic display systems. But googling the same only gives me links to companies selling these products.

Is there any good resources where i can get information about the subject?

 

[OLIVE2222]

Hi,

I guess that for such an assignment you have more information's to provide us!

Do you need to simulate it on a regular PC?
Is it a large color display or a basic led gauge?
Do you need to build it from a marketed LCD display?
Do you need to handle both hardware/firmware parts?
Must the display be to avionic spec or just be functionaly equivalent to real McCoy one's? ....

Olivier

 

[jpanhalt]

You need to describe what is included in the avionics display that you need to discuss. Here are some links to help get you started.

The first is a general link to FAA (USA) publications. They are free to copy as generally such government publications are not copyrighted. You can look for the manual called Instrument Flying Handbook.

http://www.faa.gov/regulations_policies/handbooks_manuals/

This second link is to a manual on basic flight, including common instruments. It might be a good place to start. Be sure to learn the names of the three axes of flight: roll, pitch, and yaw. Almost anything you read about avionics and navigation will use those terms.

http://www.faa.gov/regulations_poli...aft/airplane_handbook/media/FAA-H-8083-3B.pdf

John

 

[TheChronicScribbler]

@ Oliver and @John : No. i am not doing a practical implementation. It is a theory assignment to familiarize us with the functioning of the HUD/HDD systems in the cockpit. I was asked to handle the data aquisition part of it. I think this involves what all sensors are giving input to the display and the hardware/software used to convert this data to digital format.

Thanks

 

[jpanhalt]

Have you done any reading so far? Do you have any specific questions? What is it that you expect us to provide?

Instruments in a civilian airplane can be classed as engine (non-avionic), flight (those necessary for flight without navigation or communication) and those used for navigation and communication. Flight and nav.com instruments are often lumped together as avionics; although, one can make distinctions.

As for sensors, there are those that sense acceleration (e.g., many of the flight instruments), air pressure (altitude, airspeed, rate of climb) and radio (navigation communication). Some navigation instruments are inertia/acceleration based.

Since you describe your role in the team as being "sensors," I suspect the sensors for flight instruments that you are interested in are for acceleration and air pressure.

The things you mention (HUD/HDD) are just displays. They integrate data from many sources, including nav/com, flight, and engine.

In other words, please ask a question that can be answered, and we will try to answer it.

John

Edit: Forgot to add a couple of more sensors/instruments: stall and/or angle of attack (flight), icing detectors (flight) and cabin pressure.

 

[TheChronicScribbler]

@John : I have mustered enough knowledge to write the assignment, thanks to your links and a textbook, Principles of Avionics by Albert Helfrick.

But i still have some small doubts,one of which is, whether the DAQ system used by the HUD is different from that used by the rest of the system? if so, why are they seperate?

I apologize for my lack of clarity. I am new to the subject as well as using a forum.

Thanks for your help

 

[OLIVE2222]

Hi TheChronicScribbler,

here enclosed a link to an open implemenation of avionics data on a CAN bus.
The way the data are encoded and formated may be usefull to you.

http://www.stockflightsystems.com/tl_files/downloads/canaerospace/canas_17.pdf

regards,

Olivier

 

[Ian]

Welcome to the forums!

There's a good book by Ian Moir and Allan Seabridge on Avionics display systems - I've got the "Civil Avionics Systems" book, but I think they also have a more general one too. If you can get a hold of that from your library, that would be a good start.

But i still have some small doubts,one of which is, whether the DAQ system used by the HUD is different from that used by the rest of the system? if so, why are they seperate?

The information displayed on the HUD is source from the same location used by other aircraft systems - the various sensors feed everything, but as you'll have triplex/quadruplex sensors (pitot tubes, INS, etc...) there are various functions performed to check the data is correct before it is passed to the display.