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Distributed finite-time adaptive fault-tolerant consensus control of second-order multi-agent systems under deception attacks (2024)
Journal Article
Liu, C., Wang, W., Yu, Z., & Patton, R. J. (in press). Distributed finite-time adaptive fault-tolerant consensus control of second-order multi-agent systems under deception attacks. International journal of adaptive control and signal processing, https://doi.org/10.1002/acs.3750

This study addresses the issue of distributed fault-tolerant consensus control for second-order multi-agent systems subject to simultaneous actuator bias faults in the physical layer and deception attacks in the cyber layer. Cyber-physical threats (m... Read More about Distributed finite-time adaptive fault-tolerant consensus control of second-order multi-agent systems under deception attacks.

Defense and Tolerance Technique Against Attacks and Faults on Leader-Following Multi-USVs (2023)
Journal Article
Liu, C., Xia, Z., Tian, Y., & Patton, R. J. (in press). Defense and Tolerance Technique Against Attacks and Faults on Leader-Following Multi-USVs. IEEE Transactions on Intelligent Transportation Systems, https://doi.org/10.1109/TITS.2023.3330570

This study explores the leader-following consensus tracking control issue of multiple unmanned surface vehicles (multi-USVs) in the presence of malicious connectivity-mixed attacks in the cyber layer, and concurrent output channel noises, sensor/actu... Read More about Defense and Tolerance Technique Against Attacks and Faults on Leader-Following Multi-USVs.

Sensor Fault Tolerant Control for a 3-DOF Helicopter Considering Detectability Loss (2023)
Journal Article
Wang, X., Wang, Y., Zhang, Z., Wang, X., & Patton, R. (2023). Sensor Fault Tolerant Control for a 3-DOF Helicopter Considering Detectability Loss. IEEE Transactions on Circuits and Systems I: Regular Papers, https://doi.org/10.1109/TCSI.2023.3303153

This paper proposes a novel active fault tolerant control (FTC) scheme for a 3-degree-of-freedom (3-DOF) helicopter with sensor faults. As a challenge, only attitude angles are considered available, so that when the sensors measuring the elevation/tr... Read More about Sensor Fault Tolerant Control for a 3-DOF Helicopter Considering Detectability Loss.

The wave energy converter control competition (WECCCOMP): Wave energy control algorithms compared in both simulation and tank testing (2023)
Journal Article
Ringwood, J. V., Tom, N., Ferri, F., Yu, Y. H., Coe, R. G., Ruehl, K., …Faedo, N. (2023). The wave energy converter control competition (WECCCOMP): Wave energy control algorithms compared in both simulation and tank testing. Applied Ocean Research, 138, Article 103653. https://doi.org/10.1016/j.apor.2023.103653

The wave energy control competition established a benchmark problem which was offered as an open challenge to the wave energy system control community. The competition had two stages: In the first stage, competitors used a standard wave energy simula... Read More about The wave energy converter control competition (WECCCOMP): Wave energy control algorithms compared in both simulation and tank testing.

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.

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.

Decentralized Fault Estimation and Distributed Fault-tolerant Tracking Control Co-design for Sensor Faulty Multi-agent Systems with Bidirectional Couplings (2023)
Journal Article
Liu, C., Yu, Z., & Patton, R. J. (2023). Decentralized Fault Estimation and Distributed Fault-tolerant Tracking Control Co-design for Sensor Faulty Multi-agent Systems with Bidirectional Couplings. International journal of control, automation, and systems, 21, 810-819. https://doi.org/10.1007/s12555-021-1038-4

This study proposes a co-design framework of decentralized fault estimation and distributed fault-tolerant tracking control schemes of Lipschitz nonlinear multi-agent systems with external disturbances and unpredicted sensor faults. To begin with, th... Read More about Decentralized Fault Estimation and Distributed Fault-tolerant Tracking Control Co-design for Sensor Faulty Multi-agent Systems with Bidirectional Couplings.

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.

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.

Fault-tolerant consensus control of multi-agent systems under actuator/sensor faults and channel noises: A distributed anti-attack strategy (2022)
Journal Article
Liu, C., Zhao, J., Jiang, B., & Patton, R. J. (2023). Fault-tolerant consensus control of multi-agent systems under actuator/sensor faults and channel noises: A distributed anti-attack strategy. Information Sciences, 623, 1-19. https://doi.org/10.1016/j.ins.2022.12.003

This study investigates the fault-tolerant consensus control problem of multi-agent systems subject to simultaneous actuator/sensor faults and channel noises in physical hierarchy and hostile connectivity-mixed attacks in cyber hierarchy. Actuator/se... Read More about Fault-tolerant consensus control of multi-agent systems under actuator/sensor faults and channel noises: A distributed anti-attack strategy.

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.

Distributed Antittack Fault-Tolerant Tracking Control for Vehicle Platoon Systems Under Cyber-Physical Threats (2022)
Journal Article
Liu, C., Zhao, J., & Patton, R. J. (2023). Distributed Antittack Fault-Tolerant Tracking Control for Vehicle Platoon Systems Under Cyber-Physical Threats. IEEE Transactions on Industrial Informatics, 19(6), 7825-7834. https://doi.org/10.1109/TII.2022.3171343

Vehicle platoon systems are considered as automatous vehicles in a platoon-based driving pattern in which a following vehicle follows the preceding vehicle and maintains the desired vehicle spacing. This article investigates the leader-following trac... Read More about Distributed Antittack Fault-Tolerant Tracking Control for Vehicle Platoon Systems Under Cyber-Physical Threats.

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.

Distributed Fault-Tolerant Consensus Tracking Control of Multi-Agent Systems under Fixed and Switching Topologies (2021)
Journal Article
Patton, R. J., Liu, C., Jiang, B., & Zhang, K. (2021). Distributed Fault-Tolerant Consensus Tracking Control of Multi-Agent Systems under Fixed and Switching Topologies. IEEE Transactions on Circuits and Systems I: Regular Papers, 68(4), 1646-1658. https://doi.org/10.1109/TCSI.2021.3049347

This paper proposes a novel distributed fault-tolerant consensus tracking control design for multi-agent systems with abrupt and incipient actuator faults under fixed and switching topologies. The fault and state information of each individual agent... Read More about Distributed Fault-Tolerant Consensus Tracking Control of Multi-Agent Systems under Fixed and Switching Topologies.

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.

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.