Control Allocation based Structures Design for Heat Exchange Networks

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

San Diego

Simposio; International Symposium on Process Systems Engineering ? PSE 2018; 2018

In this work, a novel design methodology based on the control allocation (CA) approach is presented. The developed CA structure allows to explicitly handle constraints on inputs (e.g. actuator position limits) and also secondary control objectives such as the minimization of the control energy. In addition, it can manage actuator saturations (and faults) without performing a reconfiguration of the control structure. The proposed architecture involves two levels: (i) a high-level decentralized structure implemented with conventional PI controllers, and (ii) a CA module based on a weighted least-squares formulation which utilizes an active set method algorithm. The complete procedure only requires a steady-state model of the process for the structure design. Several dynamic simulations demonstrate the performance of the obtained strategy.