Inertial Navigation | IRS and INS Flashcards
1
Q
The products of an IRS/INS are:
A
- Position
- Speed
- Distance
- True Heading
- True Track
- Attitude
- Drift
- Ground speed
2
Q
The major difference between the IRS and INS are that an IRS uses ____
A
Ring Laser Gyros and strapdown system
3
Q
The Ring Laser Gyro is a ___ and not a real gyro
A
angular rate sensor
4
Q
The RLG uses ___ to measure angular rotation by two laser beams rotating in ___ directions inside a cavity
A
light opposite
5
Q
The main advantages of an IRS over an INS are:
A
- Improved accuracy
- Automatic calibration of both gyros and accelerometers
- Improved alignment procedure
- Simpler servicing
- No spin up time
- Not affected by G
6
Q
A drift rate of ___ per hour is considered normal for an IRS
A
0.3
7
Q
The disadvantage of an IRS is the tendency to ___, which can be overcome with a ___
A
lock in of the laser beams, dither motors
