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Робастна каскадна система за управление с вътрешен модел

Николова, Нина Георгиева; Николов, Емил Костов; Nikolova, Nina Georgieva; Nikolov, Emil Kostov, (2004)
In the present article is proposed the structure of a new robust cascade control system with internal model. The new system effectively combines the properties of the .robust system with internal model and robust system with conditional feedback, both well know in the literature. For synthesis of pro-posed system are used the method of a free parameter and method of the equation of stability. The applicability of the new system for control of industrial plant is confirmed by modeling and simulation. The robust stability and robust performance of the synthesized system are proved.
Comparative analysis of D and ID fractional regulators for the robust control of static plants

Benova, Bela Oleg; Бенова, Бела Олег, (2004)
In this paper are given the basic properties and features of the CRONE control. One of the most popular methods for the synthesis of non-integer-order control systems — the approximation by a fractio-rational recursion — is used for the conception of fractional differentiator and integro-differentiator. The dynamic and robust characteristics of two control systems including, respectively, the D and ID regulators and the same static plant, are compared Conclusions are made on the advantages and inconveniences in using these fundamental types offractional-order controllers.