Development of a real-time latching control algorithm based on wave force prediction

Li, Liang and Wang, Hongdong and Gao, Yan (2021) Development of a real-time latching control algorithm based on wave force prediction. IEEE Journal of Oceanic Engineering, 46 (2). 583 - 593. ISSN 0364-9059 (https://doi.org/10.1109/JOE.2020.2989657)

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Abstract

Optimal wave energy control is noncausal as the control command is optimized based on incoming wave force. Therefore, implementation of wave energy control requires forecasting of future wave force. A real-time latching control algorithm based on short-term wave force prediction is developed in this study to tackle such noncausality. The future wave forces are forecasted using a gray model. The receding horizon strategy is used to optimize the control command online, over the prediction horizon interval. Based on the predicted wave forces, the power extraction is maximized by locking and releasing the buoy alternately according to the optimized control command. Simulation results show that the power extraction is increased substantially with implementation of the developed real-time latching control algorithm, even if the future wave forces are predicted. Effects of prediction length and prediction error on the energy conversion are examined. It is found that more wave energy is harvested when a long prediction length is employed while prediction error decreases the control efficiency. The extreme load of power takeoff system increases when the wave energy control is implemented although its travel distance is hardly varied.

ORCID iDs

Li, Liang ORCID logoORCID: https://orcid.org/0000-0002-8528-3171, Wang, Hongdong and Gao, Yan;
  • Item type:Article
    ID code:74384
    Dates:
    Date
    Event
    April 2021
    Published
    5 June 2020
    Published Online
    16 April 2020
    Accepted
    Notes:© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering
    Depositing user: Pure Administrator
    Date deposited:27 Oct 2020 16:02
    Last modified:11 Nov 2024 12:53
    URI:https://strathprints.strath.ac.uk/id/eprint/74384
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