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Which type of control system is controlled directly, and only, by an input signal, without the benefit of feedback?
Open-loop
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Servo systems are also classified according to their functions which include position, velocity, along with what else?
Acceleration
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Which type of circuit produces an output voltage that is proportional to the rate of change of the input voltage?
Differentiating
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Which servo property is the range of frequencies to which the system is able to respond in moving the load?
Frequency response
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What are used as error detectors in servo applications where the servo output must be proportional to the algebraic sum of two or more inputs?
Summing networks
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Which type of magnetic unit is used as an error detector in systems in which the load is not required to move through large angles?
E-transformer
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Which type of servo motors are primarily used to move light loads?
AC
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What will you have if you place two E-transformers at right angles to each other and replace the bar armature with a dome-shaped one?
Pickoff
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Which type of servo system will not be subject to oscillations but takes an excessive amount of time to reach synchronization?
Overdamped
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The crossed-E transformer assembly consists of how many legs (poles)?
5
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Which circuit is used in servo systems because it not only converts AC to DC, but it is also able to distinguish the phase of the ac signal by comparing it to a reference voltage?
Diode demodulator
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Which commonly used magnetic error detector is used as a control device in servo systems?
Synchro-control transformer
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Which device converts a DC error signal into an AC input for the servo amplifier?
Modulator
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What is the heart of the feedback loop in the velocity servo system?
Tachometer
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What senses how far the servo load is from the ordered position and then switches either the coarse signal or the fine signal into control?
Synchronizing network
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What is a tachometer sometimes referred to as?
Rate generator
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Which type of servo motor can control heavy loads at variable speeds?
DC
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The direction of the magnetic field's distortion is determined by the direction of what?
Rotor's motion
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Most DC servo motors are either the permanent magnet type, which are used for light loads, or which other type, which are used for heavy loads?
Shunt field
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What are used in servo systems to supply velocity or damping signals and are sometimes mounted on or in the same housing as the servo motor?
Tachometer generators
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When the requirements of the system call for a DC motor or other DC devices, the AC error signal within the servo system must be converted to a DC error signal before being fed to the DC servo amplifier. What circuit is the conversion made by?
Demodulator
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Which servo characteristic is defined as the time between the input of the signal and the actual movement of the load?
Time lag
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Which type of system uses a weak control signal to move large loads to a desired position with great accuracy?
Servo system
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Servo systems are either electromechanical, electrohydraulic, hydraulic, or what else?
Pneumatic
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What is a group of components that are linked together to perform a specific purpose?
Control system
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What are control systems broadly classified as?
Closed or Open loop
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Which type of control systems are the most commonly used type in the Navy because they respond and move the loads they are controlling quicker and with greater accuracy than other systems?
Closed-loop
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In a DC position servo system, which properties of a DC error signal respectively are used to determine the amount and direction the load will be driven?
Amplitude and polarity
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Which type of servo is used in applications where the load is required to be driven at a constant speed?
Velocity
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Which type of small generator generates a voltage proportional to its shaft speed?
Tachometer
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What needs to be increased on the servo amplifier to decrease the lag time and cause the load to move faster?
Gain
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An instantaneous response to an error signal will be possible when a servo system is in what condition?
Underdamped
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What is the simplest form of damping?
Friction
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Which type of device generates a signal in response to an acceleration?
Accelerometer
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What uses a friction clutch to couple a weighted flywheel to the output drive shaft of the servo motor?
Friction clutch damper
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Which type of device changes a mechanical position into a voltage that represents that position?
Position sensor
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Which form of damping corrects the overshoot by introducing a voltage in the error detector that is proportional to the rate of change of the error signal?
Error-rate
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Which type of electromechanical device is widely used to generate an error-rate voltage?
Tachometer generator
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What is one of the simplest means of converting mechanical positional information to a proportional voltage?
Potentiometer
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