Model Predictive Energy-Maximising Tracking Control for a Wavestar-Prototype Wave Energy Converter (2023)
Journal Article
Li, D., & Patton, R. (2023). Model Predictive Energy-Maximising Tracking Control for a Wavestar-Prototype Wave Energy Converter. Journal of Marine Science and Engineering, 11(7), Article 1289. https://doi.org/10.3390/jmse11071289

To date, one of the main challenges in the wave energy field is to achieve energy-maximizing control in order to reduce the levelized cost of energy (LCOE). This paper presents a model predictive velocity tracking control method based on a hierarchic... Read More about Model Predictive Energy-Maximising Tracking Control for a Wavestar-Prototype Wave Energy Converter.

Wind turbine asymmetrical load reduction with pitch sensor fault compensation (2020)
Journal Article
Liu, Y., Patton, R. J., & Shi, S. (2020). Wind turbine asymmetrical load reduction with pitch sensor fault compensation. Wind energy, 23(7), 1523-1541. https://doi.org/10.1002/we.2496

Offshore wind turbines suffer from asymmetrical loading (blades, tower, etc), leading to enhanced structural fatigue. As well as asymmetrical loading different faults (pitch system faults etc.) can occur simultaneously, causing degradation of load mi... Read More about Wind turbine asymmetrical load reduction with pitch sensor fault compensation.

Observer-Based Unknown Input Estimator of Wave Excitation Force for a Wave Energy Converter (2019)
Journal Article
Abdelrahman, M., & Patton, R. (2020). Observer-Based Unknown Input Estimator of Wave Excitation Force for a Wave Energy Converter. IEEE Transactions on Control Systems Technology, 28(6), 2665-2672. https://doi.org/10.1109/TCST.2019.2944329

Several energy maximization control approaches for point-absorber wave-energy converter (PAWEC) systems require knowledge of the wave excitation force (WEF) that is not measurable during the PAWEC operation. Many WEF estimators have been proposed bas... Read More about Observer-Based Unknown Input Estimator of Wave Excitation Force for a Wave Energy Converter.

Integrated Fault-Tolerant Control for Close Formation Flight (2019)
Journal Article
Liu, C., Jiang, B., Patton, R. J., & Zhang, K. (2020). Integrated Fault-Tolerant Control for Close Formation Flight. IEEE Transactions on Aerospace and Electronic Systems, 56(2), 839-852. https://doi.org/10.1109/TAES.2019.2920221

This paper investigates the position-tracking and attitude-tracking control problem of close formation flight with vortex effects under simultaneous actuator and sensor faults. On the basis of the estimated state and fault information from unknown in... Read More about Integrated Fault-Tolerant Control for Close Formation Flight.

Enhancement of wave energy absorption efficiency via geometry and power take-off damping tuning (2018)
Journal Article
Jin, S., Patton, R. J., & Guo, B. (2019). Enhancement of wave energy absorption efficiency via geometry and power take-off damping tuning. Energy, 169, 819-832. https://doi.org/10.1016/j.energy.2018.12.074

In this work a three dimensional computational fluid dynamic (CFD) model has been constructed based on a 1/50 scale heaving point absorber wave energy converter (PAWEC). The CFD model is validated first via wave tank tests and then is applied in this... Read More about Enhancement of wave energy absorption efficiency via geometry and power take-off damping tuning.

Hierarchical-Structure-Based Fault Estimation and Fault-Tolerant Control for Multiagent Systems (2018)
Journal Article
Liu, C., Jiang, B., Patton, R. J., & Zhang, K. (2019). Hierarchical-Structure-Based Fault Estimation and Fault-Tolerant Control for Multiagent Systems. IEEE Transactions on Control of Network Systems, 6(2), 586-597. https://doi.org/10.1109/TCNS.2018.2860460

This paper proposes a hierarchical-structure-based fault estimation and fault-tolerant control design with bidirectional interactions for nonlinear multiagent systems with actuator faults. The hierarchical structure consists of distributed multiagent... Read More about Hierarchical-Structure-Based Fault Estimation and Fault-Tolerant Control for Multiagent Systems.

Viscosity effect on a point absorber wave energy converter hydrodynamics validated by simulation and experiment (2018)
Journal Article
Siya, J., Patton, R. J., & Guo, B. (2018). Viscosity effect on a point absorber wave energy converter hydrodynamics validated by simulation and experiment. Renewable energy, 129(A), 500-512. https://doi.org/10.1016/j.renene.2018.06.006

To achieve optimal power in a wave energy conversion (WEC) system it is necessary to understand the device hydrodynamics. To maximize conversion efficiency the goal is to tune the WEC performance into resonance. The main challenge then to be overcome... Read More about Viscosity effect on a point absorber wave energy converter hydrodynamics validated by simulation and experiment.

Numerical and experimental studies of excitation force approximation for wave energy conversion (2018)
Journal Article
Guo, B., Patton, R. J., Jin, S., & Lan, J. (2018). Numerical and experimental studies of excitation force approximation for wave energy conversion. Renewable energy, 125, 877-889. https://doi.org/10.1016/j.renene.2018.03.007

Past or/and future information of the excitation force is useful for real-time power maximisation control of Wave Energy Converter (WEC) systems. Current WEC modelling approaches assume that the wave excitation force is accessible and known. However,... Read More about Numerical and experimental studies of excitation force approximation for wave energy conversion.

A decoupling approach to integrated fault-tolerant control for linear systems with unmatched non-differentiable faults (2017)
Journal Article
Lan, J., & Patton, R. J. (2018). A decoupling approach to integrated fault-tolerant control for linear systems with unmatched non-differentiable faults. Automatica : the journal of IFAC, the International Federation of Automatic Control, 89, 290-299. https://doi.org/10.1016/j.automatica.2017.12.011

This paper proposes a decoupling approach to the integrated design of fault estimation (FE) and fault-tolerant control (FTC) for linear systems in the presence of unknown bounded actuator faults and perturbations. An adaptive sliding mode augmented s... Read More about A decoupling approach to integrated fault-tolerant control for linear systems with unmatched non-differentiable faults.

Nonlinear Modeling and Verification of a Heaving Point Absorber for Wave Energy Conversion (2017)
Journal Article
Guo, B., Patton, R., Jin, S., Gilbert, J., & Parsons, D. (2017). Nonlinear Modeling and Verification of a Heaving Point Absorber for Wave Energy Conversion. IEEE Transactions on Sustainable Energy, 9(1), 453-461. https://doi.org/10.1109/tste.2017.2741341

Although the heaving Point Absorber (PA) concept is well known in wave energy conversion research, few studies focus on appropriate modelling of non-linear fluid viscous and mechanical friction dynamics. Even though these concepts are known to have n... Read More about Nonlinear Modeling and Verification of a Heaving Point Absorber for Wave Energy Conversion.

Integrated fault-tolerant control for a 3-DOF helicopter with actuator faults and saturation (2017)
Journal Article
Lan, J., Patton, R. J., & Zhu, X. (2017). Integrated fault-tolerant control for a 3-DOF helicopter with actuator faults and saturation. IET Control Theory and Applications, 11(14), 2232-2241. https://doi.org/10.1049/iet-cta.2016.1602

© The Institution of Engineering and Technology 2017. This study proposes a fault estimation (FE)-based fault-tolerant control (FTC) strategy to maintain system reliability and achieve desirable control performance for a 3-DOF helicopter system with... Read More about Integrated fault-tolerant control for a 3-DOF helicopter with actuator faults and saturation.

Fault-tolerant wind turbine pitch control using adaptive sliding mode estimation (2016)
Journal Article
Lan, J., Patton, R. J., & Zhu, X. (2018). Fault-tolerant wind turbine pitch control using adaptive sliding mode estimation. Renewable energy, 116, 219-231. https://doi.org/10.1016/j.renene.2016.12.005

Wind turbine pitch systems are essential for actuating desired blade angles and hence to keep the generator at rated speed in operation region 3. In the presence of parametric pitch actuator faults, pitch systems may have slow dynamics, affecting the... Read More about Fault-tolerant wind turbine pitch control using adaptive sliding mode estimation.

Application of model-based LPV actuator fault estimation for an industrial benchmark (2016)
Journal Article
Chen, L., Patton, R., & Goupil, P. (2016). Application of model-based LPV actuator fault estimation for an industrial benchmark. Control engineering practice, 56, 60-74. https://doi.org/10.1016/j.conengprac.2016.08.003

To bridge the gap between model-based fault diagnosis theory and the industry practice, a linear parameter varying H_/H∞ fault estimation approach is applied to a high fidelity nonlinear aircraft benchmark, to deal with the various actuator fault det... Read More about Application of model-based LPV actuator fault estimation for an industrial benchmark.

Integrated design of fault-tolerant control for nonlinear systems based on fault estimation and T-S fuzzy modelling (2016)
Journal Article
Lan, J., & Patton, R. J. (2017). Integrated design of fault-tolerant control for nonlinear systems based on fault estimation and T-S fuzzy modelling. IEEE Transactions on Fuzzy Systems, 25(5), 1141-1154. https://doi.org/10.1109/tfuzz.2016.2598849

This paper proposes an integrated design of faulttolerant control (FTC) for nonlinear systems using Takagi-Sugeno (T-S) fuzzy models in the presence of modelling uncertainty along with actuator/sensor faults and external disturbance. An augmented sta... Read More about Integrated design of fault-tolerant control for nonlinear systems based on fault estimation and T-S fuzzy modelling.

Integrated fault estimation and fault-tolerant control for uncertain Lipschitz nonlinear systems (2016)
Journal Article
Lan, J., & Patton, R. J. (2017). Integrated fault estimation and fault-tolerant control for uncertain Lipschitz nonlinear systems. International journal of robust and nonlinear control, 27(5), 761-780. https://doi.org/10.1002/rnc.3597

This paper proposes an integrated fault estimation and fault-tolerant control (FTC) design for Lipschitz non-linear systems subject to uncertainty, disturbance, and actuator/sensor faults. A non-linear unknown input observer without rank requirement... Read More about Integrated fault estimation and fault-tolerant control for uncertain Lipschitz nonlinear systems.

A new strategy for integration of fault estimation within fault-tolerant control (2016)
Journal Article
Lan, J., & Patton, R. J. (2016). A new strategy for integration of fault estimation within fault-tolerant control. Automatica : the journal of IFAC, the International Federation of Automatic Control, 69, 48-59. https://doi.org/10.1016/j.automatica.2016.02.014

© 2016 Elsevier Ltd. All rights reserved. The problem of active fault tolerant control (FTC) of dynamical systems involves the process of fault detection and isolation/fault estimation (FDI/FE) used to either make a decision as to when and how to cha... Read More about A new strategy for integration of fault estimation within fault-tolerant control.

Robust fault estimation using an LPV reference model : ADDSAFE benchmark case study (2015)
Journal Article
Chen, L., Patton, R., & Goupil, P. (2016). Robust fault estimation using an LPV reference model : ADDSAFE benchmark case study. Control engineering practice, 49, 194-203. https://doi.org/10.1016/j.conengprac.2015.12.006

This paper investigates a mixed H−/H∞ linear parameter varying (LPV) fault estimator using an LPV reference estimator. LMIs are used to calculate the affine parameter-dependent gains of the LPV fault estimator. The design strategy is applied to a hig... Read More about Robust fault estimation using an LPV reference model : ADDSAFE benchmark case study.

An active fault tolerant control approach to an offshore wind turbine model (2014)
Journal Article
Shi, F., & Patton, R. (2015). An active fault tolerant control approach to an offshore wind turbine model. Renewable energy, 75(March), 788-798. https://doi.org/10.1016/j.renene.2014.10.061

The paper proposes an observer based active fault tolerant control (AFTC) approach to a non-linear large rotor wind turbine benchmark model. A sensor fault hiding and actuator fault compensation strategy is adopted in the design. The adapted observer... Read More about An active fault tolerant control approach to an offshore wind turbine model.

Fault estimation and active fault tolerant control for linear parameter varying descriptor systems (2014)
Journal Article
Shi, F., & Patton, R. J. (2015). Fault estimation and active fault tolerant control for linear parameter varying descriptor systems. International journal of robust and nonlinear control, 25(5), 689-706. https://doi.org/10.1002/rnc.3266

Starting with the baseline controller design, this paper proposes an integrated approach of active fault tolerant control based on proportional derivative extended state observer (PDESO) for linear parameter varying descriptor systems. The PDESO can... Read More about Fault estimation and active fault tolerant control for linear parameter varying descriptor systems.

Active sensor fault tolerant output feedback tracking control for wind turbine systems via T-S model (2014)
Journal Article
Shaker, M. S., & Patton, R. J. (2014). Active sensor fault tolerant output feedback tracking control for wind turbine systems via T-S model. Engineering applications of artificial intelligence, 34, 1-12. https://doi.org/10.1016/j.engappai.2014.04.005

This paper presents a new approach to active sensor fault tolerant tracking control (FTTC) for offshore wind turbine (OWT) described via Takagi–Sugeno (T–S) multiple models. The FTTC strategy is designed in such way that aims to maintain nominal wind... Read More about Active sensor fault tolerant output feedback tracking control for wind turbine systems via T-S model.