On the sensitivity of a system compensated by the inverse Nyquist array

Bounds for the elements of the sensitivity matrix S(j¿) of a system compensated by the inverse Nyquist array method will be found and a graphical technique will be presented for determining areas in the complex plane in which the diagonal elements Sii(j¿) of S(j¿) lie. A graphical method is also described for determining frequency intervals in which the norm ¿S(j¿)¿-(or ¿S(j¿)¿1) of the sensitivity matrix is less than one. The application of the proposed techniques is illustrated in two examples