AIRPLANE
OPERATIONS
MANUAL
NAVIGATION AND
COMMUNICATION
JUNE 28, 2002
2-18-30
Page
1
Code
02
INERTIAL REFERENCE SYSTEM (IRS)
As a replacement for the Attitude and Heading Reference System
(AHRS), the EMB-145/135 airplane family may be equipped with two
identical and independent Inertial Reference Systems (IRS). Aside
replacing AHRS functions, the dual IRS installation is used as an
additional navigation sensor for the FMS, and it may also provide
accurate attitude and heading data to the Head-Up Guidance System
(HGS), when this equipment is installed.
Another possibility for HGS-equipped airplanes is the installation of a
single IRS tailored for that equipment, while PFDs, MFDs and RMUs
receive information from two AHRS.
Basically, the IRS provides attitude and heading reference data for the
airplane displays and navigation data for the FMS by sensing linear
motion and angular rates through inertial sensors.
The IRS interface with the airplane’s systems and equipment is as
follows:
−
Air Data Computers (ADC 1 and ADC 2): The IRS 1 and IRS 2
receive altitude, altitude rate and true airspeed information from the
ADC 1 and ADC 2 respectively, to improve the precision of computed
navigation data.
−
Integrated Computers (IC1 and IC2): The IRS 1 and IRS 2 provide
pitch, roll and heading information to the respective PFD, and
heading information to the respective MFD, through the IC-600s.
Data is transmitted separately to both sides, to ensure that a single
IC failure does not compromise the data path.
−
Radio Management units (RMU 1 and RMU 2): the IRS 1 provides
heading information to both RMUs via DAU 2.
−
Autopilot System: The IRS 1 provides pitch, roll and acceleration
information to the Autopilot System via IC-600-1.
−
Weather Radar: The IRS 2 provides attitude information to the
Weather Radar for antenna stabilization.
−
Flight Management System (FMS): The IRS provides attitude,
heading and navigation information to the FMS. The IRS receives
position, magnetic heading, UTC time and date from the FMS.
−
EGPWS/GPWS: The IRS 1 provides attitude and heading
information to the EGPWS/GPWS.
Summary of Contents for EMB145
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Page 610: ...EMERGENCY PROFILES AIRPLANE OPERATIONS MANUAL 1 03 95 Page 2 Code 03 SEPTEMBER 29 2000...
Page 611: ...AIRPLANE OPERATIONS MANUAL EMERGENCY PROFILES SEPTEMBER 29 2000 1 03 95 Page 3 Code 03...
Page 614: ...ABNORMAL PROFILES AIRPLANE OPERATIONS MANUAL 1 03 97 Page 2 Code 01 REVISION 25...
Page 615: ...AIRPLANE OPERATIONS MANUAL ABNORMAL PROFILES DECEMBER 20 2002 1 03 97 Page 3 Code 01...
Page 616: ...ABNORMAL PROFILES AIRPLANE OPERATIONS MANUAL 1 03 97 Page 4 Code 01 DECEMBER 20 2002...
Page 622: ...PERFORMANCE AIRPLANE OPERATIONS MANUAL 1 04 03 Page 4 Code 01 REVISION 34 INTENTIONALLY BLANK...
Page 1000: ...LOADING AIRPLANE OPERATIONS MANUAL 1 07 10 Page 4 Code 40 JUNE 28 2002 EMB 145 DOOR CLEARANCES...
Page 1070: ...AIRPLANE OPERATIONS MANUAL LOADING DECEMBER 20 2002 1 07 80 Page 3 Code 01...
Page 1072: ...AIRPLANE OPERATIONS MANUAL LOADING DECEMBER 20 2002 1 07 80 Page 5 Code 01...
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Page 1718: ...AIRPLANE OPERATIONS MANUAL ELECTRICAL MARCH 28 2002 2 05 10 Page 3 Code 01 CONFIGURATION 1...
Page 1720: ...AIRPLANE OPERATIONS MANUAL ELECTRICAL REVISION 22 2 05 10 Page 5 Code 01 CONFIGURATION 2...
Page 1724: ...AIRPLANE OPERATIONS MANUAL ELECTRICAL REVISION 23 2 05 10 Page 6C Code 01 CONFIGURATION 3A...
Page 1726: ...AIRPLANE OPERATIONS MANUAL ELECTRICAL REVISION 26 2 05 10 Page 7 Code 01 CONFIGURATION 3B...
Page 1766: ...AIRPLANE OPERATIONS MANUAL LIGHTING JANUARY 21 2002 2 06 05 Page 3 Code 01 COCKPIT LIGHTING...
Page 1768: ...AIRPLANE OPERATIONS MANUAL LIGHTING JANUARY 21 2002 2 06 05 Page 5 Code 01 GLARESHIELD PANEL...
Page 1770: ...AIRPLANE OPERATIONS MANUAL LIGHTING JANUARY 21 2002 2 06 05 Page 7 Code 01 OVERHEAD PANEL...
Page 1786: ...AIRPLANE OPERATIONS MANUAL LIGHTING JANUARY 21 2002 2 06 15 Page 7 Code 01 OVERHEAD PANEL...
Page 1792: ...AIRPLANE OPERATIONS MANUAL LIGHTING JANUARY 21 2002 2 06 20 Page 5 Code 01 OVERHEAD PANEL...
Page 1827: ...FUEL AIRPLANE OPERATIONS MANUAL 2 08 00 Page 2 Code 01 REVISION 17 INTENTIONALLY BLANK...
Page 1940: ...AIRPLANE OPERATIONS MANUAL POWERPLANT JUNE 28 2002 2 10 70 Page 5 Code 01 THRUST REVERSER...
Page 2030: ...AIRPLANE OPERATIONS MANUAL FLIGHT CONTROLS REVISION 19 2 13 20 Page 3 Code 01 RUDDER SCHEMATIC...
Page 2052: ...AIRPLANE OPERATIONS MANUAL FLIGHT CONTROLS REVISION 18 2 13 30 Page 3 Code 01 FLAP SCHEMATIC...
Page 2060: ...AIRPLANE OPERATIONS MANUAL FLIGHT CONTROLS JUNE 29 2001 2 13 35 Page 5 Code 01 CONTROL STAND...
Page 2159: ...AIRPLANE OPERATIONS MANUAL OXYGEN OCTOBER 02 2001 2 16 10 Page 3 Code 01 MAIN OXYGEN CYLINDER...
Page 2160: ...OXYGEN AIRPLANE OPERATIONS MANUAL 2 16 10 Page 4 Code 01 OCTOBER 02 2001 OXYGEN SERVICE PANEL...
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