A new method of LQ integral control for nonminimum phase systems

초록

The right half plane (RHP) zeros may causes severe problems, such as undershoots, oscillation and time delay in the transient response of the systems. In this paper, we formaulate a linear quadratic type problem to dela with the effects of the RHP zeros in the nonminumum phase systems. Based on the LQ formulation, this paper shows the trade-off relation between undershoot and rising time performances in nonminimum phase systems by using a new performance index which consists of new state and tracking error. And performance of the proposed method are shown via computer simulations.