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ECE Colloquium Series – Professor Maziar Hemati
February 15, 2018 @ 3:30 pm - 5:00 pm
As part of the *Eleanore Hale Wilson Lecture Series, ECE is proud to present:
Flow Control a la Mode
Professor Maziar Hemati
University of Minnesota
Host: Professor Murti Salapaka
Biological flyers and swimmers have a great capacity for interacting with their fluid environments. This ability is demonstrated through the agility, efficiency, and environmental awareness exhibited by numerous creatures, including birds, fish, and insects. While human-engineered systems have benefited from biological inspiration, the performance gains realized have often fallen short of their full potential. A primary limitation to attaining further improvement has been a scarcity of reliable low-dimensional fluid dynamics models, which are often needed (1) to determine the state of a complex flow from available on-board sensors (i.e., flow sensing), and (2) to exploit that knowledge to determine and execute a best course of action for achieving a desired objective (i.e., feedback control). In this talk, I will introduce modal strategies aimed at obtaining reliable dynamical systems models—suitable for real-time fluid flow sensing and control—from empirical data. In particular, I will present recent advances in techniques tailored to extract descriptive insights and predictive models from large, streaming, and noisy datasets. In the second half of the talk, I will introduce dynamic mode shaping strategies for suppressing transition to turbulence via feedback control. The modal perspective will help to highlight a fundamental performance limitation associated with more conventional optimal feedback control strategies in this context.
Maziar Hemati is an Assistant Professor in the Department of Aerospace Engineering and Mechanics at the University of Minnesota, Twin Cities. Dr. Hemati’s research program is aimed at gaining an improved understanding of the various mechanisms required to achieve reliable fluid flow sensing and control in the context of human-engineered systems, including flight vehicles, robotic swimmers, and wind turbine arrays. Prior to joining the faculty at the University of Minnesota, Dr. Hemati served as a Post-Doctoral Research Associate in the Department of Mechanical and Aerospace Engineering at Princeton University. He earned his Ph.D. and M.S. in Mechanical Engineering and his B.S. in Aerospace Engineering, all from UCLA.
*Established in 2009, the Eleanore Hale Wilson Fund supports engineering field leaders for travel to Minnesota to share their expertise and discoveries with University of Minnesota graduate students, faculty, and alumni. The fund also supports the receptions held in honor of each speaker.