Loading web-font TeX/Main/Regular

unit impulse response

Ask
For a first order system having transfer function {1\over(1+sT)}, the unit impulse response is
(a) e^{-t/T}
(b) Te^{-t/T}
(c) {1\over T} e^{-t/T}
(d) T^2 e^{-t/T}


Answer is ( c )
Concept
Solution:In General , the Transfer Function of a system is described in s-domain or z-domain. 
For any given system function / transfer function - The Unit Impulse Response is TIME DOMAIN system RESPONSE
          \therefore T.F = {1\over(1+sT)}
                                = {1/T\over 1/T+s}
= \frac{1}{T}\left(\frac{1}{s+1}\right)
= {1\over T} e^{-t/T}


No comments:

Post a Comment