1982
- ▪P.P. Khargonekar, E.D. Sontag, "On the relation between stable matrix fraction factorizations and regulable realizations of linear systems over rings", IEEE Trans. Automat. Control, vol. 27, no. 3, pp. 627–638, 1982. pdf
Abstract
Various types of transfer matrix factorizations are of interest when designing regulators for generalized types of linear systems (delay differential. 2-D, and families of systems). This paper studies the existence of stable and of stable proper factorizations, in the context of the thery of systems over rings. Factorability is related to stabilizability and detectability properties of realizations of the transfer matrix. The original formulas for coprime factorizations (which are valid, in particular, over the field of reals) were given in this paper.
1981
- ▪P.P. Khargonekar, E.D. Sontag, "On the relation between stable matrix fraction decompositions and regulable realizations of systems over rings", In Proc.\ IEEE Conf.Dec.\ and Control, San Diego, Dec.\ 1981, pp. 1006–1011, 1981.