Abstract

The root locus method is arguably the most powerful tool in the design engineer’s toolbox to design a feedback control system that meets the design specifications. The significance of s-plane roots for a system’s dynamic response was highlighted in Chapter 9. The root locus method allows to determine the traces of the roots in the s-plane as any one process parameter (for example the controller gain) is varied. Conversely, the root locus method allows to determine the specific value of a process parameter for a desired root location, and with it, for a desired dynamic response.

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