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33 Cards in this Set
- Front
- Back
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A path through which signal flows back to a previous signal in the forward path in order to be added or subtracted |
Feedback |
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The point where the root locus enters the real axis |
Break-in point |
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It converts linear differential equations into algebraic expressions |
Laplace transform |
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It is the ratio of the laplace transform of the output of a system to the laplace transform of the input |
Transfer function |
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A representation of the interconnection of subsystems that form a system |
Block diagram |
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An electrical network whose variables and parameters are analogous to another physical system |
Electrical circuit analog |
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The ratio of the laplace transform of the voltage to the laplace transform of the current |
Electrical impedance |
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The ratio of the laplace transform of the current to the laplace transform of the voltage |
Electrical admittance |
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A system that utilizes a device to control the process without using feedback thus the output has no effect upon the signal to the process is called |
Open loop control system |
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A mathematical equation where a fraction with n factors in its denominators is represented as the sum of simpler fractions |
Partial fraction expansion |
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Concerned with understanding and controlling the materials and forces of nature for the benefit of humankind |
Engineering |
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It is an interconnection of components forming a system configuration that will provide a desired response |
Control system |
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Stimulus or excitation applied to a control system from an external source to produce a specified response |
Input |
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Actual responce obtained from a control system, which may or may not be equal to the specified response at the input |
Output |
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The subsystem whose output is being controlled by the system |
Process |
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Types of control system |
Natural Man-made Combination of natural and man-made |
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A system that is less stable, cheaper, and simpler to implement |
Open-loop control system |
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A system that uses a measurement of the output and feedback of this signal to compare it with the desired input |
Closed-loop control systems |
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It is a system that is more stable, more expensive, and more complex to implement |
Closed-loop control system |
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Advantages of control system |
Power amplification Remote control Convenience of input form Compensation from disturbances |
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Response characteristics of a control system |
Transient responce Steady-state response Steady-state error |
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A response characteristic of a control system that determines the speed of the system |
Transient response |
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A response characteristic of a control system that determines the approximation to the input signal or command |
Steady-state response |
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A response characteristic of a control system that determines the accuracy of the control system |
Steady-state error |
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Objectives in designing control systems |
1. To produce the desired trensient response 2. To reduce the steady-state error 3. To achieve stability of the system |
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Test waveforms used in control systems |
1. Impulse 2. Step 3. Ramp 4. Sinusoid |
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Roots of N(s) are called |
The zeros of F(s) |
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Roots of D(s) are called |
The poles of F(s) |
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Zeros of a transfer function affect the _____ of the response but do not affect the nature of the response |
Pole |
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It offers easy passage of a high-frequency signal and difficult passage to a low frequency signal |
High pass filter |
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It is a combination of low pass and high pass filter circuit |
Band pass filter |
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It is a kind of filter that passes low frequencies above and below a particular range set by the component values |
Band stop filter |
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It is used to determine additional information on the steady-state response of a system |
Poles and zeros |
