Universal λ-tracking for nonlinearly-perturbed systems without restrictions on the relative degree

  • Authors:
  • Ye Xudong

  • Affiliations:
  • Department of Electrical Engineering, Zhejiang University, Hangzhou, 310027, People's Republic of China

  • Venue:
  • Automatica (Journal of IFAC)
  • Year:
  • 1999

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Abstract

This paper presents a universal output-feedback tracking strategy for minimum phase linear systems of arbitrary but known relative degree with a class of nonlinear perturbations and output measurement noises. Some information, such as the state dimension, the sign of high-frequency gain and the relative degree of nonlinearly perturbed systems, are not known a priori. It is proved that the tracking error is guaranteed asymptotic to the interval [-@l,@l]@?R with arbitrary prescribed @l0.