Observers for nonautonomous discrete-time nonlinear systems

  • Nam, Kwanghee (Department of Electrical Engineering at POSTECH) ;
  • Lee, Wonchang (Department of Electrical Engineering at POSTECH)
  • Published : 1991.10.01


We study the observer design problem for nonautonomous discrete-time nonlinear systems. We investigate the structure of nonautonomous discrete-time systems which are state equivalent to the nonlinear observer form and characterize their class. Necessary and sufficient conditions for the existence of an input independent (local) diffeomorphism axe derived which transforms multi-input, multi-output nonlinear systems into the nonlinear observer form.