Originally Posted by
Pvtpilot
Hope this is not a dumb question. I am still working on my ratings and I might be getting ahead of myself but can anyone tell me the difference (in a nut shell) between the two systems? (IRS and AHRS)
Looked on-line but got even more confused than I'm already am.
IRS dependes on flux-valves and AHRS is a computer generated system?
regards
Lots of people have given their version of the truth, here is mine:
IRS: Inertial reference system. Old systems used physical gyros, now replaced with laser ring gyros. After you tell the system were you are, it will keep track of where you go by adding all the the turns and accelerations. Basically only gives you position info, and as time goes on the error will get bigger.
AHRS: Attitude and Heading Reference System, gyroscopic platform that gives you your orientation, what side is up, and what direction am I going.
Lots of airplanes have all these sensors combined in different way, with more sensors, like air data attached, like AB has ADIRUs (
Air Data Inertial Reference Unit) that pretty much has all the position, heading speed altitude info.