12 . 1 The Essence of Feedback Systems
نویسنده
چکیده
We can find the response of an open-loop system due to given input using any of the methods presented in this textbook. The response obtained is strictly determined by information about the system mathematical model, system input, and system initial conditions. In control theory and its applications, given system input and initial conditions, the goal is for the system output to have a desired response (shape). The system output can be shaped by closing the feedback loop around the system (see the next figure), and using particular static and/or dynamic elements in the feedback path. By closing the feedback loop around the system several interesting and important features can be achieved:
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