PERTURBATION BOUNDS FOR THE ROBUST STAIBILITYOF POLYNOMIALS
鲁棒稳定多项式的摄动界

Given a" 'stable' polynomial, we consider the structured perturbation' b6u'.d, hndefwhich stability is preserved. Several typical perturbation bounds, including the unidirectional perturbation ho4nd, diarpond perturbation bound and rectangle perturbation bound, are discussed, 'and 'simple algorithms' to calculate them are given. Thesebounds are direct, easy to calculate and can be easily used in the robust stabilityanalysis and 'synthesis of control systems.'