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  • AME Seminar

    Wed, Jan 16, 2019 @ 11:00 AM - 12:00 PM

    Aerospace and Mechanical Engineering

    Conferences, Lectures, & Seminars


    Speaker: Maziar Hemati, University of Minnesota

    Talk Title: Flow control a la mode

    Abstract: 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, we will consider modal decomposition strategies aimed at obtaining low-dimensional dynamical systems models from empirical data. In particular, we will present recent advances in techniques tailored to extract descriptive insights and predictive models from large, streaming, and noisy datasets. The second half of the talk will present a dynamic mode shaping perspective for feedback flow control synthesis. The perspective will be used to highlight a fundamental performance limitation inherent to standard observer-based control structures, suggesting that flow reconstruction from sensor measurements may be inadvisable in some flow control applications.

    Host: AME Department

    More Info: https://ame.usc.edu/seminars/

    Location: Seaver Science Library (SSL) - 150

    Audiences: Everyone Is Invited

    Posted By: Tessa Yao

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