Authors\´ reply [to comments on "Variable structure control of discretized continuous-time systems"]

In their comments (IEEE Trans. Autom. Control, vol. 50, no. 4, pp. 538-540, Apr. 2004), Paranjpe and Phadke show that the control law inside the sector we proposed (Corradini and Orlando, "Variable structure control of discretized continuous-time systems", IEEE Trans. Autom. Control, vol. 43,no.9,pp.1329-1334,Sep.1998) works even in the case when the control input vector has a not negligible uncertain term b. Though this result is of course welcome since it widens the validity range of the controller, it is still our opinion that the control law (17b) is not completely insensitive to the amplitude of the uncertain term b. This issue is explained in the reply.