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CATEGORIES:CUED Control Group Seminars
SUMMARY:Discrete-Time Extremum-Seeking for Wiener-Hammerst
 ein Plants with Applications to Online Engine Opti
 misation - Dr. Rohan Shekhar\, University of Melbo
 urne
DTSTART;TZID=Europe/London:20131218T140000
DTEND;TZID=Europe/London:20131218T151500
UID:TALK47342AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/47342
DESCRIPTION:Extremum-Seeking (ES) is a non model-based closed-
 loop control paradigm for optimising the steady-st
 ate output of nonlinear dynamic plants.  This talk
  will introduce a new formulation of ES for discre
 te-time plants possessing a Wiener-Hammerstein str
 ucture\, which consists of a static nonlinear map 
 with linear input and output dynamics.  A novel me
 thod of analysis using Linear Parameter-Varying (L
 PV) system theory will be applied to demonstrate s
 emi-global stability of the control scheme.  Assum
 ing only limited plant knowledge\, the stability r
 esult ensures convergence of the plant output to a
  point in an arbitrarily small neighbourhood of th
 e extremum\, for appropriately chosen controller p
 arameters.  Unlike most schemes in the literature\
 , the result does not rely upon explicit time-scal
 e separation arguments.  Experimental results will
  show how the scheme is able to maximise the outpu
 t torque of an internal combustion engine in the p
 resence of an uncertain fuel composition\, by modi
 fying the spark timing.
LOCATION:Cambridge University Engineering Department\, LR6
CONTACT:Tim Hughes
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