本文从两种不同的稳定性判据出发,分别导出了适用于不同扰动类型的鲁棒性判据.这些判据并不依赖于某些传递函数的奇异值,而是基于传递函数的最小实特征值或所有特征值的最大实部,与前者相比,后者表现出较小的保守性或完全不保守. In this paper, we start with two different criteria of stability, and derive robust criteria for different types of perturbations respectively. These criteria do not depend on the singular values ​​of some transfer functions but on the minimum of transfer function Either the eigenvalue or the largest real part of all eigenvalues, the latter shows less or no conservativeness as compared to the former.