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21 Cards in this Set
- Front
- Back
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Can any rapidly spinning object be considered a gyroscope?
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Yes.
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What gyro property causes the gyro to remain in a fixed position?
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Rigidity.
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What type(s) of force does a gyro resist?
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Any force that attempts to tilt the spin axis.
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In what direction will a gyro precess in response to an outside force?
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Perpendicular (90º) to the force.
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A universally mounted gyro has how many gimbals?
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Two.
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What factors determine the rigidity of a gyro?
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Rotor speed, weight, shape.
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What type of force acts ONLY through the center of gravity of a gyro, and does NOT cause
precession? |
Force of translation.
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The amount of precession that results from a given force is determined by what quantity?
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Rigidity.
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What factor determines the direction a gyro will precess in response to a particular force?
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Direction of spin.
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When using the tight-hand rule to determine precession, which finger indicates the direction of
the applied force? |
Middle finger.
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A universally mounted gyro has how many degrees of freedom?
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Two
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If a free gyro is placed at the equator at 1200 in a vertical position; in what position should it be
at 1800? |
Horizontal.
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What are the three causes of mechanical drift in a gyro?
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Unbalanced gyro, inertia of gimbals, bearing friction.
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What is the purpose of an erection system used with a gyro?
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To achieve and maintain the proper operating position for the gyro (usually vertical or
horizontal). |
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What is the purpose of rotating the gimbal assembly in a gyro using a mercury erection system?
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Applies torque at the proper point for correct precession.
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What are rate gyros primarily used for?
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Measuring angular rates.
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How many degrees-of-freedom does a rate gyro usually have?
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One.
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What gyro characteristic provides the basis of the operation of a rate gyro?
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Precession.
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Operation of an accelerometer is based on what physical property?
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Inertia.
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What type of systems primarily use accelerometers?
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Navigation systems.
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What special requirement is the pulse counting accelerometer designed for?
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When digital data is required from an accelerometer.
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