%0 Journal Article %T Explicit Determination of State Feedback Matrices %A Omar Moh¡¯d El-Basheer El-Ghezawi %J Advances in Pure Mathematics %P 403-412 %@ 2160-0384 %D 2015 %I Scientific Research Publishing %R 10.4236/apm.2015.57040 %X Methods which calculate state feedback matrices explicitly for uncontrollable systems are considered in this paper. They are based on the well-known method of the entire eigenstructure assignment. The use of a particular similarity transformation exposes certain intrinsic properties of the closed loop w-eigenvectors together with their companion z-vectors. The methods are extended further to deal with multi-input control systems. Existence of eigenvectors solution is established. A differentiation property of the z-vectors is proved for the repeated eigenvalues assignment case. Two examples are worked out in detail. %K State Feedback %K Eigenstructure Assignment %K Pole Placement %K Explicit Methods %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=56833