Collective sliding mode technique for multivariable bumpless transfer

FABRICIO GARELLI; RICARDO J MANTZ; HERNÁN DE BATTISTA

INDUSTRIAL & ENGINEERING CHEMICAL RESEARCH

ACS Publications

Año: 2008 vol. 47 p. 2721 - 2727

0888-5885

This paper proposes a strategy for the reduction of the undesired effects caused by manual-automatic or controller switching in multivariable process control. The proposal takes advantage of dynamic sliding mode properties to avoid inconsistency between the off-line controller outputs and the plant inputs. As a consequence, jumps at the plant inputs are prevented (which is known as bumpless transfer) and undesired transients on controlled variables are significantly reduced. Some advantages of the proposed algorithm are that: (1) its implementation is extremely simple, (2) it presents distinctive robustness properties, which are characteristic of sliding regimes, and (3) it does not need the model of the plant.