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SUMMARY:System identification and model-based control of two-dimensional c
 avity oscillations - Simon Illingworth (University of Cambridge)
DTSTART:20081114T120000Z
DTEND:20081114T130000Z
UID:TALK13454@talks.cam.ac.uk
CONTACT:Carlo Quaglia
DESCRIPTION:Direct numerical simulations are used to characterize the reso
 nant instabilities in two-dimensional compressible flow over a rectangular
  cavity. Specifically\, by first using a dynamic phasor model to stabilize
  the flow\, the cavity's linear open-loop transfer function is determined.
  The transfer function's input and output consist of a body force at the c
 avity leading edge and a pressure measurement on the trailing edge wall re
 spectively. The transfer function found is used to design a model-based fe
 edback controller\, useful for reducing oscillations at a a single operati
 ng point\, or as a starting point for an adaptive controller. Numerical si
 mulations of the closed-loop system show that the model-based controller s
 uccessfully stabilizes the cavity flow. 
LOCATION:Language Unit Meeting Room
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