HYBRID DESIGN METHOD OF NONLINEAR CONTROLLERS: AVOIDING BIFURCATIONS

a hybrid design method of pulse energy conversion system (PECS) nonlinear controllers is proposed in this paper. The hybrid method makes possible to avoid bifurcation phenomena in controller dynamics at the design stage. Application of the proposed method allows to eliminate an uncertainty of switching frequency to system open loop crossover frequency ratio choice, to estimate designed controller quality indices (overshoot, settling time and steady-state error) taking into consideration its essentially nonlinear nature and to guarantee bifurcation phenomena absence with high probability. An example of this hybrid method application is demonstrated for the DC-DC buck converter controller design.