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Processes 2018, 6(8), 118; https://doi.org/10.3390/pr6080118

Input Shaping Predictive Functional Control for Different Types of Challenging Dynamics Processes

1
Department of Automatic Control and System Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK
2
Department of Mechanical Engineering, International Islamic University Malaysia, Jalan Gombak, Kuala Lumpur 53100, Malaysia
*
Author to whom correspondence should be addressed.
Received: 2 July 2018 / Revised: 18 July 2018 / Accepted: 23 July 2018 / Published: 7 August 2018
(This article belongs to the Special Issue Process Design, Integration, and Intensification)
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Abstract

Predictive functional control (PFC) is a fast and effective controller that is widely used for processes with simple dynamics. This paper proposes some techniques for improving its reliability when applied to systems with more challenging dynamics, such as those with open-loop unstable poles, oscillatory modes, or integrating modes. One historical proposal considered is to eliminate or cancel the undesirable poles via input shaping of the predictions, but this approach is shown to sometimes result in relatively poor performance. Consequently, this paper proposes to shape these poles, rather than cancelling them, to further enhance the tuning, feasibility, and stability properties of PFC. The proposed modification is analysed and evaluated on several numerical examples and also a hardware application. View Full-Text
Keywords: predictive control; unstable; underdamped; integrating; input shaping predictive control; unstable; underdamped; integrating; input shaping
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Abdullah, M.; Rossiter, J.A. Input Shaping Predictive Functional Control for Different Types of Challenging Dynamics Processes. Processes 2018, 6, 118.

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