화학공학소재연구정보센터
SIAM Journal on Control and Optimization, Vol.47, No.1, 327-344, 2008
A new perspective in the stability assessment of neutral systems with multiple and cross-talking delays
The stability of neutral systems with two cross-talking delays is investigated using the method of cluster treatment of characteristic roots (CTCR). There are two main outcomes of this study: (a) we create the "strong stabilizability" (also called the "delay stabilizability") of the system directly from the CTCR procedure. This is achieved by a small-delay stability treatment while performing the steps of the CTCR. For the "delay-stabilizable systems," we also arrive at the exact bounds of the stability regions in the domain of the delays. (b) We deploy a point-wise algorithm which computes the rightmost roots of the characteristic quasi polynomial for cross-verification of these stability regions. Several examples are presented. The correspondence between the two methods for all of them is shown to be very strong.