On Pole Placement via Eigenstructure Assignment Approach

This note comes back to the hard problem of pole placement by static output feedback: let a triplet of matrices {A;B;C} be given with n state variables, m inputs and p ouputs, find a matrix K such that the spectrum of A+BKC equals a specified set. When mp>m+p, a simple noniterative technique based upon the notion of eigenstructure that, in most cases, assigns m+p roots is proposed. It, therefore, enables the designer to assign the whole of the desired spectrum when m+p=n<mp