Predictive control of a high temperature–short time pasteurisation process

Abstract Modifications on the dynamic matrix control (DMC) algorithm are presented to deal with transfer functions with varying parameters in order to control a high temperature–short time pasteurisation process. To control processes with first order with pure time delay models whose parameters present an exogenous variable dependence, a new method of free response calculation, using multiple model information, is developed. Two methods, to cope with those nonlinear models that allow a generalised Hammerstein model description, are proposed. The proposed methods have been tested, both in simulation and in real cases, in comparison with PID and DMC classic controllers, showing important improvements on reference tracking and disturbance rejection.