  A new "model-free" control methodology is applied to a boost power converter.
The properties of the boost converter allow to evaluate the performances of the
model-free strategy in the case of switching nonlinear transfer functions,
regarding load variations. Our approach, which utilizes "intelligent" PI
controllers, does not require any converter model identification while ensuring
the stability and the robustness of the controlled system. Simulation results
show that, with a simple control structure, the proposed control method is
almost insensitive to fluctuations and large load variations.
