2008 Volume 128 Issue 2 Pages 295-302
Acording to the principle of Bode, there is the minimum-phase state as the output of minimum-phase function in the controlled object. In this paper the minimum-phase state observer/control system is shown to have abilities for optimality and robustness. The assignment of zeros in the characteristic polynomials wwD(s) and f0(s) are chosen for the design of optimality and robust stability, corresponding to the additive characteristic deviation anticipated for the controlled object. Numerical example shows the minimum-phase state observer/control system can be optimal and also restrain the deviation from unstability.