DCEE 24- Prelims

Question	Answer
an arrangement, set, or collection of things or related in such a manner as to form an entirety or whole	system
an arrangement of physical components connected or related un such a manner as to form and/or act as an entire unit	system
is an arrangement of physical components connected or related in such a manner as to command, direct, or regulate itself or another system	control system
the stimulus, excitation or command applied to a control system, typically from an external energy source, usually in order to produce a specified response from the control system	input
actual response obtained from a control system	output
may or may not be equal to the specified response implied by the input	output
a control system that is part of a larger system, its inputs and outputs may then be internal variables of the larger system	subsystem/control subsystem
the quantity responsible for activating the system to produce the output	control action
one in which the control action is independent of the output	open-loop control system
one in which the control action is somehow dependent on the output	closed-loop control system
to establish or reestablish the input-output relation to obtain a desired system accuracy	calibrate
their ability to perform accurately is determined by their calibration	open-loop
they are not usually troubled with problems of instability	open-loop
a concept to be subsequently discussed in detail	instability
any physical system which does not automatically correct for variation in its input	open-loop
control system that is sensitive to disturbances	open-loop
control system that does not measure anything	open-loop
Any physical system which does automatically correct for variation in its output	closed-loop
The output is constantly monitored and adjusted to the required value by the system	closed-loop
that property of a closed-loop system which permits the output t (controlled variable) to be compared with the input to the system so that appropriate action may be formed	feedback
closed-loop control systems are more commonly called ________	feedback control systems
shorthand, pictorial representation of the cause-and-effect relationship between the input and output of a physical system.	block diagram
it provides a convenient and useful method for characterizing the functional relationships among the various components of a control system	block diagram
System components are alternatively called _____ of the system	elements
simplest form of block diagram	single block
contains the description or mathematical operation to be performed	Block's interior
represent the direction of information or signal flow	arrows
a small circle with the appropriate plus or minus sign associated with the arrows entering the circle that represents addition and subtraction	summing point
allows same signal or variable be an input to more than one block or summing point	take-off point
Permits the signal to proceed unaltered along several different paths to several destinations	take-off point
system controlled by feedback control system	Plant/Process
output variable of the plant under the control of the feedback control system	controlled output
transmission from summing point to controlled output	forward path
components of forward path that generates the control signal applied to the plant	Feed Forward/Control Elements
output signal of the feed forward elements	control signal
transmission path from controlled output back to summing point	Feedback path
establish functional relationship between controlled output and primary feedback signal	feedback elements
external signal applied to the control system usually at the first summing point represents ideal/desired plant output behavior	reference input
function of the controlled output, algebraically summed with the reference input to obtain error signal	primary feedback signal
reference input signal plus or minus the primary feedback signal	Actuating/Error Signal
generated by the actuating signal in a feedback control system	control action
means the summing point is a subtractor	Negative Feedback
means the summing point is a adder	Positive Feedback
sinusoidal + exponential decay	Laplace Transform
for complex frequency and signal analysis special case of laplace transform (sinusoidal)	Fourier Transform
reduce differential equation to an algebraic expression	Laplace Transform
convert function from time domain to laplace domain	Laplace transform
converts from s-domain to t-domain	Inverse Laplace Transform
convert the function to a sum of simpler terms	Partial Fraction Expansion
ratio of the output and input of laplace	Transfer Function
combining two blocks in a forward path	canonical form
determines the output response to any change inn input	Transfer Function Model
R(s) = 1/s	Step Response
R(s) = 1	Impulse Response
R(s) = 1/s^2	Ramp Response

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	Created by Jahnelle Marianne Urbano about 3 years ago