ROBUST STABILITY OF STATIONARY AND NONSTATIONARY LINEAR DISCRETE-SYSTEMS

Necessary and sufficient conditions of the robust stability for stationary systems expressed through the estimates of the initial parameters (elements of the analyzed systems' matrices) are obtained for the most frequently used classes of multiple estimates (interval, polyhedron and ellipsoidal). In the cases when their checking is connected with elaborate computations the authors have suggested the conditions which are only sufficient but easily checked. The obtained results are extended for the case of nonstationary systems.