PRIMUSr 1000 Integrated Avionics System
A28--1146--112--00
A--5
AHZ--800 Attitude and Heading Reference System (AHRS)
ATTITUDE AND HEADING REFERENCE UNIT
The AHRU is the main electronics assembly of the AHRS. It contains
an inertial sensor assembly that includes the fiber optic gyros and
accelerometers.Thesemeasureaccelerationsandangularratesofthe
aircraft.
The AHRU microprocessors compute the data required for flight
control, and display functions through digital bus interconnect. In
addition, an externally mounted memory module stores the flux valve
compensation data and aircraft AHRU orientation data.
The power supplies receive dual input dc power from the aircraft. The
AHRU supplies 26 Vac for the flux valve. True airspeed (TAS)
information is supplied by the MADCs.
The system can be tested and has troubleshooting functions that are
maintenance interconnect.
AHRS CONTROL AND EICAS ANNUNCIATION
AHRS Controls
AHRS controls shown in figure A--2, are located on the instrument
panel, adjacent to the reversionary panel.
AHRS
DG
SLVD CCW
CW
AD--51726@
AHRS Controls
Figure A--2
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