Electronics and Communication Engineering - Automatic Control Systems - Discussion

20. 

A system with transfer function

may be approximated by the system

[A].
[B].
[C].
[D].

Answer: Option A

Explanation:

Coefficient (s + 15) gives the term e-15t and the coefficient (s + 20) gives the term e-20t.

These can be neglected as compared to terms corresponding to s and (s + 1).


R.Vignesh said: (Dec 27, 2018)  
Here, e Power minus infinity is zero so, the e power -15 t and e power -20 t is zero that's why it is neglected.

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