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The transfer function of a system is 1/(s + 1), compute steady state final value when excited with unit step input.

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  1. infinity
  2. 0
  3. 1
  4. 5

Answer (Detailed Solution Below)

Option 3 : 1
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Detailed Solution

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Concept:

Laplace's initial value theorem:

or

Laplace's final value theorem:

or

Explanation:

The closed-loop transfer function of a control system

r(t) = Unit step input 

Laplace of u(t)

Laplace final value theorem:

c(∞) = 1

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