Abstract
The phenomenon of CHAOS for discret models control systems is discussed. A PWM electrohidraulic servo Is studied. This nonlinear servo control has Its fixed point determined, it has its stability regions delimited as a function of its parameters. We use Marotto's theorem to show the sufficient conditions to exist CHAOS. We make use of a digital simulation with nonlinear programming techniques to show these conditions and to observe the dynamic behavior of the system. The main results are the possibilité of application of CHAOS theory to to discret models control systems, description of the behavior of such systems in unstable regions and the identification and prevision of CHAOS.
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