TY - JOUR N2 - It is shown that in uncontrollable linear system ẋ = Ax + Bu it is possible to assign arbitrarily the eigenvalues of the closed-loop system with state feedbacks u = Kx, K ∈ ℜn⨉m if rank [A B] = n. The design procedure consists in two steps. In the step 1 a nonsingular matrix  M ∈ ℜn⨉m is chosen so that the pair (MA,MB) is controllable. In step 2 the feedback matrix K is chosen so that the closed-loop matrix Ac = A  − BK has the desired eigenvalues. The procedure is illustrated by simple example. L1 - http://www.czasopisma.pan.pl/Content/124028/PDF/BPASTS_2022_70_6_3132.pdf L2 - http://www.czasopisma.pan.pl/Content/124028 PY - 2022 IS - 6 EP - e141987 DO - 10.24425/bpasts.2022.141987 KW - controllability KW - eigenvalues KW - assignment KW - linear system KW - feedback KW - procedure component A1 - Kaczorek, Tadeusz VL - 70 DA - 17.08.2022 T1 - Eigenvalues assignment in uncontrollable linear systems SP - e141987 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/124028 T2 - Bulletin of the Polish Academy of Sciences Technical Sciences ER -