Application oriented control system design based on the fuzziness of parameter uncertainties

The parameter uncertainties of the plant are included into the design process of closed-loop control. For this purpose the membership functions of the uncertain parameters are used. The design methods are based on individual closed-loop parameters, on differential equations, eigenvalue assignment and Riccati controllers. Weighting the closed-loop parameter membership function can help to include particular sensitivity considerations concerning stability. There is a remarkable difference in performance between results of control systems designed with respect to nominal or center-of-gravity data.