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PRODID:-//University of Liverpool Computer Science Seminar System//v2//EN
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DTSTAMP:20260408T090212Z
UID:Seminar-pizza-1345@lxserverA.csc.liv.ac.uk.csc.liv.ac.uk
ORGANIZER:CN=Qiyi Tang:MAILTO:Qiyi.Tang@liverpool.ac.uk
DTSTART:20260204T140000
DTEND:20260204T150000
SUMMARY:Friday Lunch and Talk Series
DESCRIPTION:Wenjun  Ye: Modelling and Control of Hysteresis Nonlinearities in Smart Actuators\n\nSmart actuators, characterised by high energy density, large stroke and rapid response, are increasingly important in micro- and nano-positioning applications. However, hysteresis nonlinearities are an inherent feature of actuators based on smart materials. For decades, these nonlinearities have represented one of the most challenging problems in control system design, as both Laplace-domain and most state-space control techniques were originally developed for differentiable linear or nonlinear systems. As a result, traditional controllers were often designed under the assumption that hysteresis effects in practical systems could be neglected.\n\n\n\nWhen actuators exhibiting hysteresis are explicitly considered, conventional methods encounter substantial difficulties in analysis, model identification and control design. In many cases, the design of such systems, or the rigorous proof of their stability, has proved extremely difficult, if not impossible. Consequently, the development of techniques for identifying hysteresis nonlinearities in smart material-based actuators has emerged as a significant research challenge in its own right.\n\n\n\nThis talk will present and discuss state-of-the-art approaches to the modelling and control of hysteresis effects in smart actuators. The scope of the presentation will range from hysteresis modelling techniques to the design of appropriate control schemes, with particular emphasis on scenarios in which complete information about the system model and states is unavailable.\n\nhttps://www.csc.liv.ac.uk/research/seminars/abstract.php?id=1345
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