Modelling and Control Tank Testing Validation for Attenuator Type Wave Energy Converter-Part III: Model Predictive Control and Robustness Validation

Following the tank testing results of linear passive damping control and linear non-causal optimal control (LNOC) in the Part I and Part II papers, this paper presents further tank testing results focusing on two aspects: Firstly, a model predictive controller (MPC) is designed based on the model de...

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Bibliographic Details
Published in:IEEE transactions on sustainable energy 2023-07, Vol.14 (3), p.1-10
Main Authors: Sun, Tao, Liao, Zhijing, Al-Ani, Mustafa, Jordan, Laura-Beth, Li, Guang, Belmont, Michael, Edwards, Christopher, Zhan, Siyuan
Format: Article
Language:English
Subjects:
Actuators
Control systems design
Controllers
Damping
deterministic sea wave prediction
Energy output
model predictive control
Optimal control
Optimization
Predictive control
Predictive models
Real-time systems
Robust control
Robustness
robustness validation
Sea state
Sea trials
System identification
Task analysis
Testing
Wave energy
Wave energy converter
Wave power
wave tank testing
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Summary:Following the tank testing results of linear passive damping control and linear non-causal optimal control (LNOC) in the Part I and Part II papers, this paper presents further tank testing results focusing on two aspects: Firstly, a model predictive controller (MPC) is designed based on the model developed by system identification in Part I to optimally handle actuator saturation limits. The MPC control is demonstrated to significantly improve the energy output by 9.86% up to 463.42% compared with a well-tuned passive damper and can also outperform the LNOC presented in Part II in a range of irregular unidirectional waves. Secondly, the robustness of the MPC controller and the LNOC controller is validated in more realistic sea conditions when directional spreading waves and side waves are superimposed onto the dominant directional waves. The test results show that both MPC and LNOC can still significantly outperform the passive damping controller in all the sea conditions. These tank testing results pave a solid way for future sea trial testing of these advanced non-causal optimal control strategies developed for wave energy converters in sea trials.
ISSN:1949-3029
1949-3037
DOI:10.1109/TSTE.2023.3246171