Title :
Morgan´s problem is still open
Author :
Herrera, H. ; Lafay, J.F.
Author_Institution :
Lab. d´´Automat. de Nantes, France
Abstract :
It is shown that the Morgan problem is not completely solved in two aspects. First, the Descusse, Lafay, and Malabre condition is necessary and sufficient only for a special class of systems. In general, it is only necessary, and second, the essential orders are not necessarily the minimal infinite structure obtained when decoupling a static decouplable system. A necessary and sufficient condition for statically decoupling a system without modifying the essential orders is presented for the case k=p-1 where p is the number of outputs and k is the rank at infinity of the proper part of the interactor
Keywords :
control system analysis; feedback; multivariable control systems; Morgan problem; interactor; minimal infinite structure; rank at infinity; static decouplable system; Control systems; Controllability; H infinity control; Laplace equations; Nonlinear systems; Polynomials; Stability; State feedback; State-space methods; Sufficient conditions;
Conference_Titel :
Decision and Control, 1992., Proceedings of the 31st IEEE Conference on
Conference_Location :
Tucson, AZ
Print_ISBN :
0-7803-0872-7
DOI :
10.1109/CDC.1992.371764
