Regularization of descriptor systems
A. Bunse-Gerstner, V. Mehrmann, N.K. Nichols · 2002
Algebraic conditions which ensure that a descriptor system can be regularized by derivative-plus-proportional output feedback are presented. The results are established using a canonical form which can be constructed by a numerically stable algorithm. The feedback can be selected so that the closed-loop system is strongly controllable and observable, has index at most one, and is optimally conditioned.>