Gyroscopes | Types of Gyroscope

Question 1

The conventional gyroscope uses the principle of stored ___ energy

Answer 1

mechanical

Question 2

Gyros with 3 planes of freedom have _ gimbals, and total freedom to move around _ axis

Answer 2

2, 3

Question 3

A space gyro is free to move in ___ directions with reference to space

Answer 3

all

Question 4

A tied gyro has the spin axis tied down in ___ local plane

Answer 4

one

Question 5

A tied gyro has _ degrees of freedom

Answer 5

2

Question 6

A DGI is an example of a ___ gyro

Answer 6

tied

Question 7

An Earth gyro is like a tied gyro, but with the spin axis tied Earth ___ by gravity

Answer 7

vertically

Question 8

Space gyros, tied gyros, and Earth gyros have _ planes of freedom

Answer 8

3

Question 9

Gyros with 2 plans of freedom show the ___ of movement, rather than position

Answer 9

rate

Question 10

A rate gyro has ___ gimbal, free to move around _ axis

Answer 10

1 2

Question 11

A rate gyro is designed to show ___ of movement about the axis at right angles to the two free axes

Answer 11

rate

Question 12

A ___ gyro is used in the turn and slip/turn coordinator

Answer 12

rate

Question 13

A rate integrating gyro is used in the ___

Answer 13

INS

Question 14

A rate integrating gyro gimbal is restrained by ___ of ___, rather than the springs used by rate gyros

Answer 14

viscosity of fluid

Question 15

Regarding a rate integrating gyro, as the aircraft turns about the sensitive axis, the precession is used to generate an error signal, the magnitude of which signifies the ___ at which the aircraft is turning about the axis

Answer 15

rate

Question 16

A gyroscope can be classified using the number of axes, not including the ___ axis

Answer 16

spin

Question 17

A gyro with 3 planes of rotation has _ degrees of freedom

Answer 17

2

Question 18

A degree of freedom is the ability to move around an ___

Answer 18

axis

Question 19

The spin axis cannot precess, but each gimbal allows it to do so in the ___ direction

Answer 19

other

Question 20

An airborne instrument, with a gyro that has 2 degrees of freedom and a horizontal spin axis could be a ___

Answer 20

DGH

Question 21

Spinning freedom is about an axis ___ through the centre

Answer 21

perpendicular

Question 22

Tilting freedom is about a horizontal axis perpendicular to the ___ axis

Answer 22

spin

Question 23

Veering freedom is about a vertical axis perpendicular to the ___ and ___ axis

Answer 23

spin, tilt

Question 24

Attitude gyros use ___ ___ ___ for their operation, while rate gyros use ___

Answer 24

rigidity in space, precession

Question 25

In a 3-gimbal system, ___ gimbals can end up in line, effectively removing one from the equation.

Answer 25

two

Question 26

A fourth gimbal (as used with INS) can keep the 2nd and 3rd gimbals ____ to each other to prevent gimbal lock

Answer 26

perpendicular

Question 27

Air-driven gyroscopic instruments are made to spin through ___ or ___, the heading and attitude indicator, or electricity, turn instruments.

Answer 27

suction or pressure

Question 28

A rate gyro and rate integrating gyro have _ planes of freedom

Answer 28

2

Question 29

With suction, air is usually sucked out of the casing, to create a ___ that will be indicated on a gauge in the cockpit

Answer 29

vacuum

Question 30

With ___ suction, the filters are blocked or the equipment is worn and the gyros will run too slowly.

Answer 30

low

Question 31

If the suction gauge is reading too ___, the gyros will run too fast

Answer 31

high

Question 32

Vanes on the gyro mass catch the air movement and force it to go around at several ___ RMP

Answer 32

thousand

Question 33

The rest of the ___ system has a pump driven by the engine, a relief valve, an air filter, and tubing for connections

Answer 33

vacuum

Question 34

The relief valve is kept closed with a ___, which is pre-adjusuted so that the air pressure on the outside of the valve is balanced against the spring tension

Answer 34

spring

Question 35

If the adjusted value is ___, the outside air pressure overcomes the spring, opening the valve to allow outside air to flow into the system, until balance is restored.

Answer 35

exceed

Question 36

At high altitudes, suction drive gyros can lose ___ because they cannot produce so much vacuum

Answer 36

rigidity

Question 37

Suction gyros losing their rigidity at high altitudes can be resolved by using an ___ gyro

Answer 37

electrical

Question 38

The electrical gyro motor in large aircraft uses a power supply of ___v, ___ Hz 3-phase _C.

Answer 38

115 400 AC

Question 39

A smaller plane will use an inverter to produce __V

Answer 39

26

Question 40

_C is used in artificial horizons

Answer 40

AC

Question 41

_C is used in turn and bank indicators

Answer 41

DC

Question 42

Fast erection involves giving the motors a ___ error signal, which can be done in unaccelerated flight

Answer 42

higher

Question 43

Ring laser gyros are used in ___

Answer 43

IRS

Question 44

The laser ring gyro is made of ___ that does not expand, as any expansion would produce the equivalent of ___ wander in a mechanical gyro

Answer 44

ceramic real

Question 45

Noise from imperfections in the mirrors is the same as ___ wander

Answer 45

random

Question 46

Two ___ and a ___ ___ are used to create the beams

Answer 46

anodes, common cathode

Question 47

The servo mirror can (not) move

Answer 47

it can

Question 48

The beams are in phase when there is ___

Answer 48

no acceleration

Question 49

The optical path must be kept a length that is a multiple of the lasing ___

Answer 49

wavelength

Question 50

The light beam travelling in the direction of rotation will travel a slightly ____ path while the opposite will travel a slightly ___ path

Answer 50

longer shorter

Question 51

The rotation causing the beams to travel different distances will cause a change of the interference pattern, with the distance depending on the ___ of rotation

Answer 51

rate

Question 52

Ring laser gyros are ___ accurate, and have a ___ life cycle than conventional ones.

Answer 52

more longer

Question 53

Laser ring gyro has ___ moving parts

Answer 53

no

Question 54

Laser gyros are ___ to align

Answer 54

quick

Question 55

Laser gyros do (not) suffer from precession

Answer 55

not

Question 56

At low input rates, the frequency differences become very near to ___ due to back scatter from one beam to another. This is called ____

Answer 56

zero, dithering

Question 57

The unit is rotated clockwise and anti-clockwise about the axis at a rate ___ to the mechanical resonance of the system

Answer 57

similar

Question 58

Dithering is done at around ___ Hz, with a peak dither velocity of 1 arc-second per second

Answer 58

400