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Feedback Architectures on Multivariable Engine Control Problems

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Abstract:
The global need for improved fuel economy and reduced emissions often requires innovative mechanical engine configurations (new actuators) that introduce additional design parameters (control variables) used to optimize the engine performance. These new actuators result in highly complex powertrains with significant coupling between subsystems thus posing challenging multivariable control problems. This talk will take you through the control development stages of engines equipped with a variable camshaft timing mechanism and a variable geometry turbocharger. We will show how control theoretical tools can be used to identify the inherent system limitations as they arise from the fundamentally discrete plant properties, subsystem interactions and constraints imposed by sensor/actuator fidelity/authority. Furthermore, we will demonstrate the potential of coordinated, multivariable feedback in alleviating these limitations.

Type of Seminar:
Public Seminar
Speaker:
Prof. Dr. Anna G. Stefanopoulou
Mechanical Engineering Dept at the University of Michigan, USA
Date/Time:
Apr 04, 2001   17:15
Location:

ETH-Zentrum, ETZ E6, Gloriastrasse 35, 8006 Zuerich
Contact Person:

Prof. L. Guzzella
No downloadable files available.
Biographical Sketch:
Anna G. Stefanopoulou obtained her Diploma (1991, National Technical University of Athens, Greece) and M.S. (1992, Univ. of Michigan, U.S.) in Naval Architecture and Marine Engineering. She received her second M.S. (1994) and her Ph.D. (1996) in Electrical Engineering and Computer Sc. from the University of Michigan. Dr. Stefanopoulou was an Assistant Professor at the University of California, Santa Barbara, and a Technical Specialist at the Scientific Research Laboratories at Ford Motor Company. She is presently an Associate Professor at the Mechanical Engineering Department at the University of Michigan. Dr. Stefanopoulou is Chair of the Transportation Panel in ASME DSCD, a recipient of a 1997 NSF CAREER, a 1998 Ford Innovation award, a 1999 UCSB SPUR Undergraduate Research Mentor Award, and an invitee of the 1999 National Academy of Engineering Symposium on Frontiers of Engineering. Her current research interests are in powertrain modeling and control, controller architectures for industrial applications, and multivariable feedback control.