Root locus analysis of a high-gain linear system with variable coefficients; Application of Horowitz´s method

An extension of Horowitz´s root-locus compensation design method is presented for analyzing and designing a high-gain linear system having variable coefficients. Rules for positioning the far-out poles of such a system based upon known specifications are established. These rules, when applicable, permit a high-gain system capable of handling large variations in the loop gain parameter to be successfully designed.