A new model free approach to simultaneously stabilizing

In this paper an approach is presented to calculating the family of stabilizing PID controller for simultaneously stabilizing. The important feature of this approach is that there is no need to mathematical model of plants and the only required data is the frequency responses of plants. Also it is illustrated that the performance specifications such as H∞-norm of complementary sensitivity function can be improved by the same approach. The usefulness of the proposed approach is illustrated by an academic example.