Double-Ended Estimates of a Minimum Robust H∞-Norm for Uncertain Controllable Systems.

For the class of uncertain nonlinear controllable systems, the notion of a robust H∞- norm is introduced. An efficient procedure of obtaining double-ended estimates for a minimum robust H∞-norm in the class of nonlinear feedback loops is stated. An example is given of the system for which the obtained estimates coincide with one another and with a minimum robust norm. [ABSTRACT FROM AUTHOR]