Fractional order and BICO disturbance observers for a run-of-mine ore milling circuit
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Date
Authors
Olivier, Laurentz Eugene
Craig, Ian Keith
Chen, Y.Q.
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
Grinding mill circuits are hard to control due to poor plant models, large external disturbances, uncertainties from internal couplings, and process variables that are difficult to measure. This paper proposes a novel fractional order disturbance observer (FO-DOB) for a run-of-mine (ROM) ore milling circuit. A fractional order low pass filter (Q-filer) is used in the DOB to offer an additional degree of freedom in tuning for set-point tracking performance and disturbance rejection performance. Another disturbance observer is introduced in which a Bode ideal cut-off (BICO) filter is used for the Q-filter. A full non-linear plant model is used for evaluation of the performance
gained over the ubiquitous PI controller. The simulation results show that the FO-DOB and BICO-DOB schemes are useful additional tools for ROM ore milling circuit control implementations.
Description
Keywords
Bode ideal cut-off, Disturbance observer, Fractional order, Milling, Run-of-mine ore
Sustainable Development Goals
Citation
L.E. Olivier, et al., Fractional order and BICO disturbance observers for a run-of-mine ore milling circuit, J. Process Control (2011), doi:10.1016/j.jprocont.2011.11.001