Abstract

FEEDBACK CONTROL SYSTEM DESIGN is most effective when both steady-state and transient performance specifications can be realized. One approach, synthesis, proceeds from a set of closed-loop specifications to an appropriate open-loop system which, upon closure of the feedback path, satisfies the specifications. Almost without exception, a compensation network must be used in conjunction with the fixed portion of the system G <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> (s). In many cases it is desirable that the compensation network consist of resistance and capacitance elements. To be R-C realizable, the poles of the transfer function describing the compensation network must be simple on the negative real axis, the origin and infinity excluded, i.e., its pole-zero excess must be equal to or greater than zero.

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