Towards Minimal-Order Stabilizers for All-Pole Plants

Abstract In this paper, a lower bound is derived on the order of stabilizers for an all-pole plant and is related to the number and locations of the plant's unstable and lightly-damped poles. In case that the plant has γ unstable real poles, the bound becomes (γ - 1). Further, it is also shown that the minimal order of stabilizers is ( n - 1) if all n poles of the plant are real and unstable. Several examples are included to illustrate the results.