3a

Question 1

The principle of INS is what?

Answer 1

Measurement of acceleration

Question 2

Designed to determine the geographical position of a vehicle and to guide the vehicle from one point to another

Answer 2

INS Theory

Question 3

The INS establishes a ____ frame of reference and senses a/c

Answer 3

3D

Question 4

What law of motion is-

For every action there is an equal and opposite reaction

Answer 4

3rd

Question 5

Objects tend to maintain a state of motion

Answer 5

1st Law

Question 6

Acceleration is dependent on an objects mass and the force applied to it is what law?

Answer 6

2nd

Question 7

This is the resistance of an object to a change in its state of motion

Answer 7

Inertia

Question 8

This is an older system and uses mechanical gyros in a stabilized platform

Answer 8

Standard INS

Question 9

This is a newer system that requires fewer components, provides greater speed and enhanced accuracy

Answer 9

Strap down RLG

Question 10

Purpose is to sense acceleration in a linear direction

Answer 10

Accelerometers

Question 11

This is an electro mechanical device that will measure acceleration forces

Answer 11

Accelerometer

Question 12

This is a type of accelerometer which produces an electric charge when a force is exerted by the seismic mass under some accelerations

Answer 12

Piezoelectric

Question 13

This is a type of accelerometer, acceleration causes a seismic mass pendulum to move

Answer 13

Servo

Question 14

This is the type of accelerometer, acceleration causes a change in the space between the moving and fixed electrodes of a capacitive accelerometer

Answer 14

Capacitive 

Question 15

Mechanically establishes a stable platform that remains orientated with the earths gravitational field

There are 4 of these 

Answer 15

Gimbals

Question 16

This type of Gyro has a minimum start time with attitude available instantaneously upon start

Answer 16

Ring laser Gyro RLG

Question 17

Process of precisely determining the INU attitude

Answer 17

Alignment

Question 18

There are three types of alignment-

Optical alignment, leveling and what else

Answer 18

Gyro – compassing

Question 19

Calibration is done where

Answer 19

Factory

Question 20

Acceleration with time =

Answer 20

Velocity

Question 21

Velocity with time=

Answer 21

Distance

Question 22

The amount of drift that an INU has a incurred over a period of time

Answer 22

Radial error rate RER

Question 23

This is the angular tilt of the platform inducing velocity errors

Answer 23

Drift

Question 24

A medium accuracy INS has an allowable RER tolerance of what

Answer 24

1.6 NM/Hr

Question 25

The standard INS has how many accelerometers mounted on the stabilized platform?

Answer 25

3

Question 26

How many RLG‘s are mounted on a rigid platform

Answer 26

3

Question 27

This has two counter rotating laser beams that travel around a closed circuit

Answer 27

Ring Laser Gyro RLG

Question 28

There are three known INS inputs, What are they?

Answer 28

Present position to include aircraft altitude Acceleration in three axis’ Time

Question 29

This requires latitude, longitude and altitude while the aircraft is not moving. This gives the system a start point

Answer 29

Inertial data