Scientia et technica

Numerical and Experimental Comparison of the Control Techniques Quasi-Sliding, Sliding and PID, in a DC-DC Buck Converter

Fredy Edimer Hoyos Velasco, Nicolás Toro García, Yeison Alberto Garcés Gómez


In this paper the Sliding Mode Control (SMC), PID
and ZAD (Zero Average Dynamic) strategies are applied to an
electronic DC-DC power converter. Time behavior for each
controller is shown for numerical solution and experimental
realization. The results in SMC and PID are contrasted with a
ZAD-FPIC controller combined with a recently developed
strategy named FPIC (Fixed Point Induction Control). Stability
in SMC is guaranteed by the Lyapunov theorem. The PID
controller is designed in an analytical way using pole placement.
The main problem with the physical realization was the sample
and hold in the variable acquisition system, in addition to time
delay introduced by the computing process. From a practical
point of view, the ZAD-FPIC technique has advantages no shown
by PID and SMC working with sample and hold, these
advantages have been corroborated experimentally. The designs
have been tested in an RCP (Rapid Control Prototyping) system
based on DSP from the dSPACE platform. Both numerical
performance and experimental performance agree.

Palabras clave

Sliding mode control, ZAD-FPIC, PID controller analytical design, numerical and experimental results, delay time, DPWM, DC-DC buck converter, Lyapunov analysis

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