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Solution to Morgan’s problem. (English) Zbl 0656.93018
The authors present necessary and sufficient conditions for existence of a decoupling feedback $$u=Fx+Gv$$ for a time-invariant system $$\dot x=Ax+Bu$$, $$y=Cx$$, with A invertible, B monic, and C epic matrices. The conditions are given in terms of simple inequalities between the integers of dual Morse lists $$I_ 2$$ and $$I_ 4$$.
Reviewer: J.Kucera

##### MSC:
 93B27 Geometric methods 93C05 Linear systems in control theory
##### Keywords:
decoupling feedback; dual Morse lists; time-invariant
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