TY - GEN
T1 - New non-linear QFT technique
AU - Safonov, Shmuel
AU - Yaniv, Oded
PY - 2009
Y1 - 2009
N2 - A robust feedback synthesis problem around single-input single-output nonlinear uncertain plant is considered. A new design methodology have been developed that do not use the Schauder fixed point theorem, which is a major limitation of existing nonlinear Quantitative Feedback Theory (QFT) methodology. The new method presents necessary conditions on prefilter F and linear-time-invariant controller G to satisfy closed loop tracking performance specifications. A domain of choice for G is found, translated into the frequency domain, and is presented in the form of QFT bounds for the solution controller. The result is a synthesis technique that requires shaping both of a controller and a pre-filter to satisfy QFT bounds. The new technique produces solutions with lower control efforts than the existing ones, and can be successfully applied to a much larger class of nonlinear plants as well as of specifications sets.
AB - A robust feedback synthesis problem around single-input single-output nonlinear uncertain plant is considered. A new design methodology have been developed that do not use the Schauder fixed point theorem, which is a major limitation of existing nonlinear Quantitative Feedback Theory (QFT) methodology. The new method presents necessary conditions on prefilter F and linear-time-invariant controller G to satisfy closed loop tracking performance specifications. A domain of choice for G is found, translated into the frequency domain, and is presented in the form of QFT bounds for the solution controller. The result is a synthesis technique that requires shaping both of a controller and a pre-filter to satisfy QFT bounds. The new technique produces solutions with lower control efforts than the existing ones, and can be successfully applied to a much larger class of nonlinear plants as well as of specifications sets.
KW - Automatic control systems
KW - Feedback synthesis
KW - Nonlinear plants
KW - Quantitative Feedback Theory
KW - Robust control
UR - http://www.scopus.com/inward/record.url?scp=80051491369&partnerID=8YFLogxK
U2 - 10.3182/20090616-3-IL-2002.0091
DO - 10.3182/20090616-3-IL-2002.0091
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AN - SCOPUS:80051491369
SN - 9783902661456
T3 - IFAC Proceedings Volumes (IFAC-PapersOnline)
SP - 108
EP - 113
BT - ROCOND'09 - 6th IFAC Symposium on Robust Control Design, Proceedings
T2 - 6th IFAC Symposium on Robust Control Design, ROCOND'09
Y2 - 16 June 2009 through 18 June 2009
ER -