SKEDSOFT

Control Systems - 1

Root-Locus Plots of Negative-Feedback and Positive Feedback Systems

Table 1 shows various root-locus plots of negative-feedback and positive feedback systems. The closed-loop transfer functions are given by

 

Table 1: Root-Locus Plots of Negative-Feedback and Positive Feedback Systems

 

(Heavy lines and curves correspond to negative-feedback systems; dashed lines and curves correspond to positive-feedback systems.)