Andreas Schwung

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In recent years, a concise theory of recurrent fuzzy systems has emerged and methods for utilizing these fuzzy systems with dynamics for modeling and fault detection were developed. At the same time, sum of squares decompositions in conjunction with semidefinite programming were successfully applied for the synthesis of controllers for polynomial systems.(More)
This paper presents a novel approach to the control of fast operating point transitions of compression systems for gas turbines. A nonlinear model of the compression system is derived and shown to be flat. Based on the flatness property a feedforward control for a two-degree of freedom controller is designed, which permits fast transitions between operating(More)
This paper presents a novel approach to the control of compressor systems used for the supply of fuel gas to gas turbines in combined cycle power plants. A model for the compression system is derived first and special attention is paid to an accurate description of the compressor map. Due to the strong coupling of the nonlinear dynamics of the compression(More)
Zusammenfassung Dieser Beitrag beschreibt die Anwen-dung zeitdiskreter rekurrenter Fuzzy-Systeme (DRFS) zur Fehlerdetektion und Fehlerisolation. Zum einen wird gezeigt, wie auf Basis datengestützt entworfener DRFS geeignete Residuen gebildet werden können. Zum anderen wird ein Ansatz zur Mehrfehlerisolation mit DRFS präsentiert. Dieser Ansatz basiert auf(More)
This paper presents a novel approach to cyber-physical modeling of compression systems. The proposed model covers both physical as well as virtual, i.e. control components. As the modeling framework we employ hybrid automata due to their ability to conveniently handle both continuous and discrete dynamics. Simulation results comparing the proposed model(More)