ROBUST MULTIVARIABLE REGULATOR DESIGN - GENERAL CASES.
Soh YC., Evans RJ.
A technique is presented for designing robustly stable controllers for multivariable systems with poorly known parameters. It is assumed that the system matrices A, B, C are interval matrices, i. e. , their elements live within prescribed intervals, and a stabilizing controller is designed to ensure that the resulting closed-loop system remains stable when A, B and C take arbitrary values within their intervals.