By using the method of constructing positivelydefinitematrix, some new results for robust stability of uncertain time_delay systems are derived, and the stability degree is also discussed.
利用构造正定矩阵的方法，给出了判别不确定时滞系统鲁棒稳定的几个新结果，同时讨论了这类系统的稳定度。
2
Finally a displacement generalized eigenvalue equation is obtained, in which the stiffness matrix is symmetric and positivelydefinite.