Seminar G Maione Nov 2013

“Design and realization of high-performance and robust fractional order controllers: An application for automotive systems”

By Guido Maione

Location
07.005, conference room, Ashby building, QUB

Time & Date
3:00 pm, Wednesday, 20 Nov 2013 (tea/coffee will be served before the lecture)

Abstract

In the last years, researchers and, to a certain extent, also industrial experts paid an increased attention to design, tuning, simulation, experimentation, and realization of the so-called non-integer order controllers. These devices extend PID controllers with non-integer integral or derivative actions, represented by irrational powers of the Laplace complex variable s. Non-integer order controllers are also misnamed fractional-order controllers (FOC) or fractional order PID (FOPID) controllers because of the frequent but not necessary use of a fractional order of integration or differentiation. If compared to standard solutions of industrial applications employing PI or PID controllers, the FOPID achieve higher robustness of the controlled loops with respect to gain and parameter variations of the plant. They also improve dynamic performance of the controlled loop.
The focus of this talk is on recent application of FOC to mechatronic and automotive systems and, in particular, on innovative engines employing compressed natural gas to reduce emission of pollutants. To this aim, the rail pressure regulation in common rail and the setting of the opening time intervals of electro-injectors are of fundamental importance, to achieve an accurate metering of the injected fuel forming the right stoichiometric air/fuel mixture. But, if, on one side, it is possible to precisely set the opening time intervals, on the other side, pressure regulation is more difficult because of gas compressibility and variation of working point due to changes in power and speed request, to disturbances, etc. The solution offered by FOC to this problem conjugates the improvements in robustness and performance with a controller structure resembling the standard PID and is simpler than the one of more complex integer order controllers achieving the same specifications. Then, the FOC simplicity and flexibility could be appreciated by the automotive industry that is always interested in reducing costs.

Bio-sketch of the speaker

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Guido Maione received the Laurea degree with honours in Electronics Engineering in 1992 and the PhD in Electrical Engineering in 1997, both from Politecnico di Bari, Italy. In 1996 he joined the University of Lecce, where he was Assistant Professor in Control Systems Engineering. In this period, he was Visiting Scholar at the Rensselaer Polytechnic Institute of Troy, New York, in 1997. On December 31st, 2002, he moved to the 2nd Engineering School of Politecnico di Bari, located at Taranto, Italy. In 2007 and 2009 he visited the Queen’s University of Belfast, after being invited by Prof. Irwin and Li. His current and past research interests are in the field of: non-integer (fractional) order systems and controllers; modelling, simulation, and control of crowd evacuation in standard or emergency conditions; control of multimedia streaming on UMTS networks; modelling, simulation, and control of discrete event systems (flexible and automated manufacturing systems, intermodal container terminals, etc.); soft computing techniques applied to multi-agent systems; Petri nets and digraph models. Dr. Maione is author or co-author of about 90 publications on international/national journals, book chapters, and conference proceedings.

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