Gyroscopes Flashcards
What are the two properties of a Gyroscope?
- Rigidity in Space
- Precession
What is the definition of a space gyro and how are the planes related?
Also known as a free gyro it is able to move in all three planes Both the planes are at right angles to each other
A tied gyro is responsible for which instruments?(2)
- Artificial Horizon
- DI Indicator
A Horizontal gyro is tied to?
A horizontal gyro is tied to the earth horizontal based on an azimuth
A rate Gyro is:
- Classified by In which instrument(s)
- Can be developed into?
The rate gyro only has freedom in the plane of rotation and one more plane This can be used for a rate of turn indicator A rate indicating Gyro can be developed from this
What type of gyro is in a remote indicating compass?
Tied Gyro
How many gimbals does a remote indicating gyro have?
Two
What does an inertial accelerometer detect?
Linear Acceleration
What is the product of the second intigration in an INS system?
Distance is the product of the second intigration
What is a stable platform system?
The stable platform system requires that the accelerometer is always level and aligned to north, measuring accelration relatvie to its platform,
What is a wander angle system?
This system is required to be kept on a platform and not worry about being alligned with True North, measuring how far out of alignment it is.
What is a strap down system?
A strap down system is a system that is not aligned to north or levelling, detecting how far out of alignment it goes at initialisation and measuring changes from this position.
What informaiton is required for alignment.
Latitude information is required for alignment.
A strapdown IRU includes, measures and is?
- Three Ring Laser Gyros
- Three Accelerometers
- A strapdown IRU measures the acceleration of the trihedron which is fixed
- A strapdown IRU has faster alignment and is more accurate in the time than a stable platform
A space Gyro is…
A space gyro is able to move freely in all three planes in relation to its mounting system
Any movement away from the rigidity of a gyro is called?
Wander
A tied Gyro is…
Able to move in all three planes, but is now influenced in one of its planes by an external force.
The earth gyro is what type of gyro and….
The earth gyro is a tied gyro that is tied to the earthc horizontal by gravity.
A rate gyro is….
A rate gyro has rotation in only the plane of rotation and in rotation to 90deg to it.
Degrees of freedom are?
The degrees of freedom is another way to classify a gyro and is the number of axes about which gyro displacement can be measured and does not count the axis of rotation.
A vertical Gyroscope is…..
Is aligned with the earth vertical
