A Design Method for Low-Sensitivity Control with Robust Stability for Minimum Phase Systems with Uncertain Relative Degree

Abstract

In this paper, we examine a design method for low-sensitivity control with robust stability for minimum phase single-input/single-output systems. Yamada clarified that low-sensitivity control systems with robust stability can be designed under the assumption that the relative degree of the plant is equal to that of the nominal plant. In some cases, it is difficult to obtain an accurate relative degree of the plant. We expand Yamada’s result and propose a design method for low-sensitivity control systems with robust stability for systems with uncertain relative degree. Our method adapts a parallel compensation technique and a design method for a parallel compensator is given. A design procedure for low-sensitivity control systems with robust stability using a parallel compensation technique is presented.