WorksheetsFEEDBACK AND CONTROL SYSTEMS
Total questions: 28
Worksheet time: 1hrs 4mins
In an open loop control system the output ________
is independent of control input
is dependent on control input
only system parameters have effect on the control output
none of the above
A control system in which the control action is somehow dependent on the output is known as ______
Open loop system
Semiclosed loop system
Closed loop system
None of the the above
In open loop system the control action ________
depends on the size of the system
depends on system variables
depends on the input signal
is independent of the output
An automatic toaster is a ______ loop control system.
Open
Closed
Partially closed
all of the above
A closed loop system is distinguished from open loop system by which of the following?
Servomotor
Feedback
Output pattern
Input pattern
Which among the following is not an advantage of an open loop system?
Simplicity in construction and design
Easy maintenance
Rare problems of stability
Requirement of systems calibration from time to time
In a time shifting property, a negative to means _______
Factor in which a right shifting is being performed
Factor in which a left shifting is being performed
Factor in which a middle shifting is being performed
Factor in which no shifting is being performed
Linearity property is a combination of _________ principles.
Homogeneity and Thevenin's
Thevenin's and Superposition
Superposition and Homogenity
Laplace and Fourier
This principle states that if we multiply a constant in the time domain, the same constant will be multiplied in the laplace domain.
Thevenin's principle
Superposition principle
Linearity Principle
Homogeneity Principle
In a closed loop system, _______________.
the error with respect to the desired input is being determined
the error with respect to the desired output is not determined
the error with respect to the desired input is not determined
the error with respect to the desired output is being determined
Which of the following is not an advantage of a closed loop system?
Accuracy is high
More reliable
Complex in design
Cost effective
This converts the complex differential equations into simple algebraic equations.
Fourier Transform
Laplace Transform
Fourier Series
Laplace Series
A -Sot in the frequency shifting property would mean that?
A left shifting has been made in the frequency domain
A right shifting has been made in the frequency domain
A middle shifting has been made in the frequency domain
No shifting has been made in the frequency domain
What is the laplace transform of σ(t)?
1
s
s1
s21
What is the laplace transform of u(t)?
1
s
s1
s21
Determine the laplace transform of sin5(t)
(a)
Determine the laplace transform of cos2(t)
(a)
Determine the laplace transform of L{5}
(a)
Evaluate L{e3t}
(a)
Using the frequency shifting property, determine the laplace transform of f(t)=e2tt4
(a)
Supposed that a laplace transform of a certain function f(t) is (2s+1)2(s−1)s2−s+1 Find the laplace transform of f(2t).
(a)
Evaluate δ(t+6) + δ(t-3) + δ(t+4)
(a)
Evaluate L{u(t-5)}
(a)
find the laplace transform of f(t)= et sinh(10t)
(a)
Using the frequency shift property, determine the laplace transform of f(t) = e-5tsin3t
(a)
Evaluate dtdy(t)+7y(t) = 5cos (2t)
(a)
Determine the laplace transform of y(t) if all the initial conditions are zero. dt2d2y (t)+12 dtdy + 32 y(t) = 32 u(t)
(a)
When the output of a system is used to influence input, it is known as
Automation
Feedback
Processing
Measuring
