INVESTIGADORES
PULESTON Pablo Federico
congresos y reuniones científicas
Título:
Variable Feasibility study of variable gain Super-Twisting control in fuel cells based systems
Autor/es:
C.EVANGELISTA; PULESTON P.F.; C.KUNUSCH
Reunión:
Congreso; 13th Int. Workshop on Variable Structure Syst., VSS 2014; 2014
Institución organizadora:
VSS
Resumen:
This work presents a controller based on a Super-
Twisting (ST) algorithm with variable gains, designed to maximize
the efficiency of a fuel cell (FC). The strategy consists on
regulating the oxygen excess ratio, maintaining it at an optimum
value in spite of external disturbances and model uncertainties.
The tested algorithm has the well-known advantages of the
original ST with fixed gains, such as simplicity, robustness
against uncertainty and disturbances, reduced chattering and
finite time convergence. In addition, the variability of its gains
allows expanding the range of operation, without a significant
increase in the complexity of the control law. The adjustment
of the gains is based on certain variable bounding functions,
which have to be determined analysing the system and its
characteristics. This process is laborious for a non-linear system
like the FC, but is performed off-line during the design
stage. Promising results have been obtained through exhausting
simulation tests, considering model uncertainties and highly
variable load regimes.