Inertial Navigation System: Difference between revisions

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==Overview==
The inertial navigation system is a system of aircraft navigation still used today in many large aircraft as the primary navigation system. Instead of using radio navigation aids or satellites, this system is entirely self-contained within the aircraft, computing the aircraft's position by sensing its acceleration and orientation. It, in essence, is a real accurate dead-reckoning computer.
The inertial navigation system is a system of aircraft navigation still used today in many large aircraft as the primary navigation system. Instead of using radio navigation aids or satellites, this system is entirely self-contained within the aircraft, computing the aircraft's position by sensing its acceleration and orientation. It, in essence, is a real accurate dead-reckoning computer.


There are several names for it, some with slightly different uses:
There are several names for it, some with slightly different uses:
 
<ul>
Inertial Navigation System (INS)
<li>Inertial Navigation System (INS)
 
<li>Inertial Reference System (IRS)
Inertial Reference System (IRS)
<li>Inertial Navigation Unit (INU)
 
<li>Inertial Reference Unit (IRU)
Inertial Navigation Unit (INU)
<li>Inertial Measurement Unit (IMU, the name used by NASA in many cases -- look at the Pheonix lander now on Mars.)
 
</ul>
Inertial Reference Unit (IRU)
 
Inertial Measurement Unit (IMU, the name used by NASA in many cases -- look at the Pheonix lander now on Mars.)


Dead-reckoning is a navigation technique where you know where you started, what direction you flew, how fast you flew, and how long you flew. You can then, on a map, trace your position.[http://www.navfltsm.addr.com/basic-nav-general.htm] The inertial navigation system (abbreviated "INS") uses accelerometers to find your velocity and direction, and computers compile in the time and an entered start position to calculate your current position.
Dead-reckoning is a navigation technique where you know where you started, what direction you flew, how fast you flew, and how long you flew. You can then, on a map, trace your position.[http://www.navfltsm.addr.com/basic-nav-general.htm] The inertial navigation system (abbreviated "INS") uses accelerometers to find your velocity and direction, and computers compile in the time and an entered start position to calculate your current position.
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