Abstract: Fuzzy logic is used to develop so-called fuzzy PID controllers, which are non-linear controllers with large applications in process control. The advantages of fuzzy control are better quality control criteria and robustness at error in parameter estimation and at disturbance influence. The paper presents some general methods to design PID fuzzy controllers using families of input-output transfer characteristics of fuzzy blocks and gain characteristics. Based on these transfer characteristics we may do a pseudo-equivalence of PID fuzzy controllers with linear PID controllers. Also, the paper presents the way of fuzzy controller design to assure absolute global internal stability of fuzzy control system. Some applications are presented with modeling and simulations for a large class: PI, PD and PID fuzzy controllers. Results of simulation demonstrate the viability of the design methods.
 

Brief Biography of the Speaker: Prof. Constantin Volosencu graduated in 1981 the Faculty of Electrotechnics, “Traian Vuia” Polytechnic Institute of Timisoara, Romania, as an engineer in automatics and computers and he is doctor in control systems at “Politehnica” University of Timisoara. In present he is professor at “Politehnica” University of Timisoara, Faculty of Automatics and Computers, Department of Automatics and Applied Informatics. His research interest is in linear control systems, fuzzy control, neural networks, control of electrical drives, modelling, simulation, identification and sensor networks. He is author of 9 books and more then 100 scientific papers, published at international conferences and journals. He was manager of over 30 national an international research projects.
Constantin Volosencu worked from 1981 to 1990 at “Electrotimis” Enterprise Timisoara, in the field of the control systems for industrial machines, where he developed control equipments for a large scale of machineries, which are the objects of 27 patents.