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    Higher Order Predictive Functional Control versus dynamical matrix control for a milk pasteurisation process: Transfer function versus finite step response internal models


    Khadir, M.T. and Ringwood, John (2014) Higher Order Predictive Functional Control versus dynamical matrix control for a milk pasteurisation process: Transfer function versus finite step response internal models. International Journal of Food Engineering. ISSN 1556-3758

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    Abstract

    Predictive functional control (PFC), a model pre- dictive control algorithm, has been proven to be very suc- cessful in a wealth of industrial applications due to its many laudable attribute, such as its s implicity and intuitive appeal. For simple single input single output processes, PFC applica- tions use a first-order plus delay internal model and, as long as such models improve the control over classical control strategies, then their use remains justified. In this paper, a higher order internal PFC model is considered in order to reduce any possible plant-model mismatch, where the inter- nal model is formulated as a series of cascaded or parallel first-order systems. The control approach is compared to a more conventional over parameterized dynamical matrix control (DMC) approach, used extensively for Multi-Input Multi-Output systems in the petrochemical industry. This paper demonstrates the benefits of the PFC higher order formulation for a typical milk pasteurisation plant, with sig- nificant improvements in the variances of both controlled and manipulated variables when compared to a first-order PFC. In this aspect, the higher order controller competes well with DMC performances, however, using a much more sim- pler and compact internal model form.

    Item Type: Article
    Keywords: model predictive control; predictive functional control; milk pasteurisation;
    Academic Unit: Faculty of Science and Engineering > Electronic Engineering
    Item ID: 6801
    Identification Number: https://doi.org/10.1515/ijfe-2012-0006
    Depositing User: Professor John Ringwood
    Date Deposited: 14 Jan 2016 15:35
    Journal or Publication Title: International Journal of Food Engineering
    Publisher: De Gruyter
    Refereed: Yes
    URI:

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