Improved control strategies for the environment within cell culture bioreactors (2023)
Journal Article
Jones, J., Kindembe, D., Branton, H., Lawal, N., Montero, E. L., Mack, J., …Montague, G. (2023). Improved control strategies for the environment within cell culture bioreactors. Food and Bioproducts Processing, 138, 209-220. https://doi.org/10.1016/j.fbp.2023.02.004

This paper describes the development of improved control strategies for the standard environmental conditions in a fed-batch bioreactor used for monoclonal antibody cell culture. The consequences of relying on fixed parameter PID based controllers ar... Read More about Improved control strategies for the environment within cell culture bioreactors.

Actuator fault tolerant offshore wind turbine load mitigation control (2023)
Journal Article
Liu, Y., Patton, R. J., & Shi, S. (2023). Actuator fault tolerant offshore wind turbine load mitigation control. Renewable energy, 205, 432-446. https://doi.org/10.1016/j.renene.2023.01.092

Offshore wind turbine (OWT) rotors have large diameters with flexible blade structures which are subject to asymmetrical loads caused by blade flapping and turbulent or unsteady wind flow. Rotor imbalance inevitably leads to enhanced fatigue of blade... Read More about Actuator fault tolerant offshore wind turbine load mitigation control.

An iterative strategy for robust integration of fault estimation and fault-tolerant control (2022)
Journal Article
Lan, J., & Patton, R. (2022). An iterative strategy for robust integration of fault estimation and fault-tolerant control. Automatica : the journal of IFAC, the International Federation of Automatic Control, 145, Article 110556. https://doi.org/10.1016/j.automatica.2022.110556

This paper considers fault estimation (FE) and fault-tolerant control (FTC) for linear parameter varying systems with actuator and sensor faults, uncertainties, and disturbances. The inevitable coupling between the FE and FTC functions needs to be ta... Read More about An iterative strategy for robust integration of fault estimation and fault-tolerant control.

Aggressive maneuver oriented robust actuator fault estimation of a 3-DOF helicopter prototype considering measurement noises (2021)
Journal Article
Wang, T., Lu, M., Zhu, X., & Patton, R. (2022). Aggressive maneuver oriented robust actuator fault estimation of a 3-DOF helicopter prototype considering measurement noises. IEEE/ASME Transactions on Mechatronics, 27(3), 1672-1682. https://doi.org/10.1109/TMECH.2021.3087193

This paper presents a robust actuator fault estimation strategy design for a 3-DOF helicopter prototype which can be adapted to aggressive maneuvers. First, considering large pitch angle condition during flight, nonlinear coupling characteristic of t... Read More about Aggressive maneuver oriented robust actuator fault estimation of a 3-DOF helicopter prototype considering measurement noises.

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.

Decentralized Output Sliding-Mode Fault-Tolerant Control for Heterogeneous Multiagent Systems (2019)
Journal Article
Liu, C., Jiang, B., Patton, R. J., & Zhang, K. (2020). Decentralized Output Sliding-Mode Fault-Tolerant Control for Heterogeneous Multiagent Systems. IEEE Transactions on Cybernetics, 50(12), 4934-4945. https://doi.org/10.1109/TCYB.2019.2912636

This paper proposes a novel decentralized output sliding-mode fault-tolerant control (FTC) design for heterogeneous multiagent systems (MASs) with matched disturbances, unmatched nonlinear interactions, and actuator faults. The respective iteration a... Read More about Decentralized Output Sliding-Mode Fault-Tolerant Control for Heterogeneous Multiagent Systems.

Hydrodynamic and control optimization for a heaving point absorber wave energy converter (2019)
Thesis
Jin, S. (2019). Hydrodynamic and control optimization for a heaving point absorber wave energy converter. (Thesis). University of Hull. Retrieved from https://hull-repository.worktribe.com/output/4221763

The thesis aims at studying the non-linear performance of a designed 1/50 scale point absorber wave energy converter (PAWEC) in heave motion. In particular, designs of the PAWEC geometry and control strategy are considered to optimize the power captu... Read More about Hydrodynamic and control optimization for a heaving point absorber wave energy converter.

Fault-tolerant load reduction control for large offshore wind turbines (2019)
Thesis
Liu, Y. (2019). Fault-tolerant load reduction control for large offshore wind turbines. (Thesis). University of Hull. Retrieved from https://hull-repository.worktribe.com/output/4270015

Offshore wind turbines suffer from asymmetrical loading (blades, tower etc.), leading to enhanced structural fatigue. As well as asymmetrical loading different types of faults (pitch system faults etc.) can occur simultaneously, causing degradation o... Read More about Fault-tolerant load reduction control for large offshore wind turbines.