PI predictive fuzzy controllers for electrical drive speed control: methods and software for stable development

Authors:
Radu-Emil Precup;Stefan Preitl;Gabriel Faur
Affiliations:
Faculty of Automation and Computers, Department of Automation and Industrial Informatics, "Politehnica" University of Timisoara, Bd. V. Parvan 2, RO-1900 Timisoara, Romania;Faculty of Automation and Computers, Department of Automation and Industrial Informatics, "Politehnica" University of Timisoara, Bd. V. Parvan 2, RO-1900 Timisoara, Romania;Department of Information Technology, West Bank Arad San Paolo Imi, Bd. Revolutiei 88, RO-2900 Arad, Romania
Venue:
Computers in Industry - Special issue: Soft computing in industrial applications
Year:
2003

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Abstract

The paper presents two structures of PI predictive fuzzy controllers (PI-P-FCs) with first- and second-order prediction. The PI-P-FCs are meant for the speed control of electrical drives with variable inertia used in several industrial applications. The new development method for these PI-P-FCs is based on guaranteeing a desired domain for the "phase margin" of the fuzzy control systems (FCSs) with PI-P-FCs when they are considered to be equivalent to the linear control systems with linear (conventional) PI controllers. It is also proposed a stability analysis method for the FCSs with PI-P-FCs employing Popov's hyperstability theory and a discrete-time state space mathematical model of the controlled plant. A software tool for the stability analysis of the FCSs, developed in the Matlab and Simulink environment, is presented.