Control allocation based plantwide control structure design for heat exchange networks

LUPPI, PATRICIO; BRACCIA, LAUTARO; MARCHETTI, PABLO A.; ZUMOFFEN, DAVID

Conferencia; International Symposium on Process Systems Engineering; 2018

In this work, a novel design methodology based on the control allocation (CA) approachis presented. The CA structure allows to explicitly handle the input constraints (e.g.actuator position limits) as well as the secondary control objectives (e.g. minimizationof the control energy). In addition, it can manage actuator saturations (and faults)without performing a reconfiguration of the control structure. The proposed architectureinvolves two levels: (i) a high-level decentralized structure implemented withconventional PI controllers and (ii) a CA module based on a weighted least-squaresformulation which utilizes an active set method algorithm. The complete procedure onlyrequires a steady-state model of the process for the structure design. Several dynamicsimulations demonstrate the performance of the suggested strategy.