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The introduction of the root-locus method in the z-plane simplifies the investigation of sampled-data control systems, by demonstrating the correlation between transient response and the location of the roots. It is shown that by establishing the correlation between frequency locus and the root locus, the correlation between frequency and transient response of sampled-data systems can be demonstrated.
American Institute of Electrical Engineers, Part II: Applications and Industry, Transactions of the (Volume:74 , Issue: 6 )
Date of Publication: Jan. 1956