Finite Frequency Phase Property Versus Achievable Control Performance in Hα Loop Shaping Design

This paper is concerned with characterization of easily-controllable plants in practice, and attempts to obtain a quantitative result that relates the phase property of the plant and the achievable control performance in Hinfin loop shaping design. In particular, the connection between the gain at the critical phase delay of 180[degree] and the achievable control performance gammaoptlesradic(4+(2radic2)) is clarified

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