Why IRS systems ?

With the advancements and accuracy of the satellite navigation system (GPS )

the IRS system is considered as the most powerful and effective technology in the marketplace for Aircraft navigation system for several reasons.

First we get to know what the IRS system is ? What it consists of , and How it works ?

An IRS system ( inertia reference system) is a modern INS that usually has a greater integration into the flight management system FMS .

IRS is an onboard self -contained inertia navigation system that can provide continuous information on an aircraft position without any external assistance, and provides the aircrafts with the actual magnetic position and heading information with reference to the FMS required position and heading.

How it works ?

INS systems components :

Position computer

Accelerometers

Gyroscopes

INS measures the aircrafts inertia movement from an initial position as a great circle track direction and distance to continuously determine its up to date position. The aircraft moves in three dimensions and the IRS is interested in acceleration in the horizontal plane movements.

The directional acceleration information provided from INS accelerometers and gyroscopes is calculated by the position computer which determine the aircraft present latitude and longitude provided by the correct initial position has been entered.

The INS is aligned to true north via the gyroscopes and to magnetic north by stored magnetic variations.

By captain / Ahmed Shebl Airbus A320/321,330,300-600&310 , FAA Flight instructor CFI,CFII,MEI and MBA aviation management