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Why the transfer function is represented in S Domain?

  1. Dec 18, 2014 #1


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    Hi all,

    I would like to know why the Transfre function of the system is represented in S Domain instead of doing all the math in time domain itself. I studied a course on control systems and i wonder why s- domain is taken instead of other domains like Z- domain and others.
    Please refer belwo for an example of transfer function representation images.png .

    Thanks in advance.
  2. jcsd
  3. Dec 18, 2014 #2


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    The math in the transformed domain is just algebra. This makes it significantly simpler than doing it in the oroginal domain.
  4. Dec 19, 2014 #3


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    Thanks for answering Orodruin. I totally agree with you and i am in same impression about this. I asked this question to find if there is any specific reason other than this.
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