GATE EC 2017 Set 2 — Question 34
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Engineering Mathematics → Calculus → Definite & Improper Integrals
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Question
The transfer function of a causal LTI system is . If the input to the system is , where is a unit step function, the system output as is
Correct answer
0.45 to 0.55
Solution
The input signal is given by .
We know that the Laplace transform of is .
More generally, .
For , .
So, .
.The transfer function of the system is .
The output in the s-domain is .To find the output as , we use the Final Value Theorem:
.Substituting :
.
.As , .
So, .The final value of the output as is .
We know that the Laplace transform of is .
More generally, .
For , .
So, .
.The transfer function of the system is .
The output in the s-domain is .To find the output as , we use the Final Value Theorem:
.Substituting :
.
.As , .
So, .The final value of the output as is .
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