On asymptotic stability of linear neutral delay-differential systems

The stability testing problem for linear neutral delay-differential systems is addressed. By means of the concept of spectral radius, both delay-independent and-dependent stability criteria are derived. These criteria are also extended to the neutral systems with multiple time delays. The main results proposed here are better than those reported in the literature. Compared with the several existing stability criteria, the stability robustness bounds are significantly improved. Some examples are used to show the significance of our results.