A state feedback
method of reduced order for eigenvalue assignment is developed in this paper.
It offers immediate assignment of m eigenvalues,
with freedom to assign the remaining n-m eigenvalues. The method also enjoys a systematic one-step application in the case
where the system has a square submatrix. Further simplification is also
possible in certain cases. The method is shown to be applicable to uncontrollable
systems, offering the simplest control law when having maximum uncontrollable eigenvalues.？
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