Article
Computer Science, Information Systems
Sen Chen, Zhixiang Chen, Yi Huang, Zhi-Liang Zhao
Summary: The paper presents a new approach to the control problem of uncertain nonlinear systems, utilizing an extended state observer to estimate control input uncertainty and achieve ideal input tracking, investigating transient performance under various nonlinear uncertainties. The theoretical results demonstrate the effectiveness of the proposed design in controlling tracking and estimation errors despite the presence of uncertainties.
SCIENCE CHINA-INFORMATION SCIENCES
(2022)
Article
Engineering, Mechanical
Yunlang Xu, Chenyang Ding, Xinyi Su, Zhi Li, Xiaofeng Yang
Summary: This paper proposes an enhanced unknown system dynamics estimator (USDE)-based sliding mode control (USDE-SMC) method by a novel predictive-adaptive switching (PAS) controller (USDE-SMC-PAS) to improve the control performance of the reluctance actuator maglev system. By achieving characteristics such as high levitation accuracy, high dynamic response, and reduced chattering, this method significantly improves the control performance.
NONLINEAR DYNAMICS
(2023)
Article
Engineering, Multidisciplinary
Haidong Sun, Cheng Liu, Hao Zhang, Yanming Cheng, Yongyin Qu
Summary: This article presents a dual closed-loop control system based on SC-PID control for voltage control of the phase-shift full-bridge converter. SC-PID breaks the limitation of traditional PID control by introducing a new control idea, improving the system stability and anti-disturbance ability. By conducting simulation comparisons in MATLAB, the SC-PID control system shows better steady-state accuracy and robustness.
MATHEMATICAL PROBLEMS IN ENGINEERING
(2021)
Article
Automation & Control Systems
Qicheng Mei, Jinhua She, Feng Wang, Yosuke Nakanishi
Summary: This article presents an improved equivalent-input-disturbance (EID) approach that actively rejects exogenous disturbances for a plant. The control system based on this approach includes a new EID estimator constructed by embedding integrals to the conventional EID estimator, which enhances disturbance estimation precision without amplifying measurement noise. Stability conditions of the control system are obtained using the separation theorem, and the system design ensures these conditions are satisfied. Experimental results from a rotational control system validate the effectiveness of the approach.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Energy & Fuels
Elham Abazarian, Reza Gheshlaghi, Mahmood A. Mahdavi
Summary: This study investigates the interaction and voltage loss in sediment microbial fuel cells (SMFCs) in open channels. The addition of a new SMFC increases the voltage in the former SMFC and eliminates voltage fluctuations in the new SMFC. However, series connection leads to voltage loss in the SMFCs.
Article
Chemistry, Analytical
Yuming Ai, Baocheng Yu, Yanduo Zhang, Wenxia Xu, Tao Lu
Summary: In the production process of high-voltage coils, a constant tension control system is designed to improve the quality of the transformer. The system adopts active disturbance rejection control (ADRC) optimized by the Smith predictor (SP) to achieve constant tension control. The experiment results demonstrate that this SP-ADRC based tension control system has higher control accuracy, shorter stabilization time, and stronger anti-interference ability compared to the traditional PID algorithm.
Article
Engineering, Electrical & Electronic
Tianyu Ouyang, Fengying Ma, Baolong Zhu, Peng Ji, Lei Lian
Summary: In this study, a sliding mode controller and a fuzzy sliding mode control method were designed to address the issue of high susceptibility to external disturbances in microbial fuel cells. Simulation results demonstrated that the designed methods exhibited smaller steady-state error and overshoot compared to other control approaches.
Article
Environmental Sciences
Supriya Gupta, Ashmita Patro, Yamini Mittal, Saurabh Dwivedi, Palak Saket, Rupobrata Panja, Tanveer Saeed, Fernando Martinez, Asheesh Kumar Yadav
Summary: Microbial fuel cell (MFC) is a promising technology that converts chemical energy into electricity. This review examines the development of MFC technology from the lab to the field, including different variants such as sediment-microbial fuel cell (S-MFC), plant-microbial fuel cell (P-MFC), and integrated constructed wetlands-microbial fuel cell (CW-MFC). The review also evaluates the commercialization potential and challenges of these technologies.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Robotics
Shaomeng Gu, Jinhui Zhang, Suli Zou, Kai Zhao, Zhongjing Ma
Summary: In this paper, a novel variable gain active disturbance rejection control (VGADRC) approach is introduced to tackle the trajectory tracking problem of delta parallel manipulators with disturbances. The proposed method incorporates error-driven variable gains to achieve desired performance specifications, while guaranteeing ultimate boundedness. Simulations and experiments are conducted to verify the effectiveness and advantages of the proposed method.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2022)
Article
Automation & Control Systems
Saif Ahmad, Ahmad Ali
Summary: This research proposes a low-power higher order extended state observer (ESO) to overcome the limitations of active disturbance rejection control (ADRC) technique, such as sensitivity to high-frequency measurement noise and complicated numerical implementation. The analysis also reveals the similarity between a recently proposed cascade ESO (CESO) and higher-order ESO. A case study on a dc-dc boost converter demonstrates the practical advantages of the proposed scheme, including improved immunity to high-frequency measurement noise, precise regulation in the presence of time-varying disturbance, low observer gains, and ease of tuning due to a single observer parameter.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Mechanical
Biao Xiang, Qingyuan Guo, Waion Wong
Summary: The electrostatic suspension system is a contactless detective method to analyze the material properties of test samples, with suspension precision in the vertical direction being sensitive to disturbances. To improve the stability of test samples and reduce oscillation amplitudes, an active disturbance rejection control (ADRC) model has been designed.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Chemistry, Physical
Adib Mahmoodi Nasrabadi, Mahdi Moghimi
Summary: Microbial fuel cells have zero-carbon emissions and can purify water and prevent carbon dioxide emissions. Further research and development is needed for microbial fuel cells compared to other fuel cells. Scientists have recently studied the most important parameters affecting microbial fuel cells in order to improve their performance. Understanding microbial fuel cells can be enhanced by examining multiple influential parameters in a single study.
JOURNAL OF POWER SOURCES
(2023)
Article
Automation & Control Systems
Krzysztof Lakomy, Rafal Madonski
Summary: A new observer design is proposed to improve estimation performance in the presence of noise by utilizing a unique cascade combination of ESOs, allowing for fast and accurate signal reconstruction while avoiding over-amplification of measurement noise. The introduced observer structure shows improvement over standard solutions in terms of noise attenuation, as verified through numerical validation and theoretical analysis.
Article
Engineering, Electrical & Electronic
Jitendra Kumar Singh, Surya Prakash, Khaled Al Jaafari, Omar Al Zaabi, Khalifa Al Hosani, Ranjan Kumar Behera, Utkal Ranjan Muduli
Summary: This study proposes an ADRC-based control method for PV-GFI systems, which combines a linear extended state observer and a phase-locked loop observer to achieve optimized tracking performance. The controller can address uncertainties, grid voltage variations, and filter resonance, while also being able to adapt to variable grid voltage and frequency deviations.
IEEE TRANSACTIONS ON POWER DELIVERY
(2023)
Article
Multidisciplinary Sciences
Ali Mazaheri, Farhad Barati, Farideh Ghavipanjeh
Summary: This paper proposes a Linear Quadratic Gaussian (LQG) multivariable control approach to compensate for the dead-time effects in three-phase grid-tied inverters. By running the inverter in current-controlled mode and using the LQG controller, high performance and attenuation of disturbances are achieved. Experimental results demonstrate the excellent performance of the proposed approach in attenuating the dead-time introduced harmonics.
SCIENTIFIC REPORTS
(2023)
Article
Green & Sustainable Science & Technology
Tim Patterson, Jaime Massanet-Nicolau, Rhys Jones, Alessio Boldrin, Francesco Valentino, Richard Dinsdale, Alan Guwy
Summary: The meat and dairy industry in Europe relies on grass production, but there is potential to use grass for producing alternative products like polyhydroxyalkanoates (PHA) due to pressures to reduce agriculture's environmental impact, potential decrease in meat and dairy consumption, and the need to lower food production costs. Research shows that utilizing grass as a carbon source for PHA production could lead to a viable future option with reduced energy demand and improved efficiency through process optimization.
JOURNAL OF INDUSTRIAL ECOLOGY
(2021)
Article
Electrochemistry
Bongkyu Kim, In Seop Chang, Richard M. Dinsdale, Alan J. Guwy
Summary: The scanning electrochemical impedance spectroscopy (EIS) technique can be used to confirm the variation of internal resistance in microbial fuel cells (MFCs) under different working conditions, including charge transfer resistance and ohmic resistance. By measuring the overall internal resistance of the system and the charge transfer resistance of the anode and cathode using the scanning EIS method, it was found that the resistances of each electrode changed variably. This method revealed that the rapid increase in the anode's charge transfer resistance was the main cause of power overshoot, providing valuable insights for understanding undesirable phenomena in MFCs.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Kleitos Panagi, Christian J. Laycock, James P. Reed, Alan J. Guwy
Summary: This study investigates the effects of biohythane mixtures on the electrical performance and fuel processing of a SOFC, showing that blending H2/CO2 with CH4 to make biohythane can significantly increase SOFC efficiency and durability while reducing CH4 consumption.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Rhys Jon Jones, Rodrigo Fernandez-Feito, Jaime Massanet-Nicolau, Richard Dinsdale, Alan Guwy
Summary: A novel method for recovering volatile fatty acids (VFAs) from a continuously-fed food waste bioreactor was developed, increasing production rates to 35 mg VFA/gVSS/day by alleviating end-product inhibition and arresting methanogenesis. The recovered VFAs were concentrated to 4000 mg/L through electrodialysis, making them suitable for use as platform chemicals with minimal refining. This represents a promising means of producing sustainable platform chemicals and also helps reduce methane emissions from bioreactors.
Article
Green & Sustainable Science & Technology
R. J. Jones, J. Massanet-Nicolau, R. Fernandez-Feito, R. M. Dinsdale, A. J. Guwy
Summary: An industrially applicable methodology utilizing a novel combination of filtration and electrochemical separation technologies was successfully used to recover and enhance the production of volatile fatty acids. The yields of volatile fatty acids were increased and concentrated in a solution suitable for downstream conversion to platform chemicals. The study suggests that there is potential to further increase volatile fatty acid recovery rates and yields by increasing the capacity of the recovery methodology.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Biotechnology & Applied Microbiology
Amandeep Kaur, Bongkyu Kim, Richard Dinsdale, Alan Guwy, Eileen Yu, Giuliano Premier
Summary: The study proposed a scalable reactor system for electrochemical CO2 reduction to formate, which is a precursor for the production of fuels, pharmaceuticals, and fertilizers. The results showed that formic acid can be efficiently produced in a short period of time with specific parameters, although further optimization of systems and operating strategies is needed.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2021)
Article
Engineering, Environmental
Gamal K. Hassan, Rhys Jon Jones, Jaime Massanet-Nicolau, Richard Dinsdale, M. M. Abo-Aly, Fatma A. El-Gohary, Alan Guwy
Summary: A novel approach of using two stage anaerobic digestion coupled with electrodialysis technology successfully improved bio hydrogen and methane yields, reduced COD, and further enhanced waste treatment efficiency.
Article
Agricultural Engineering
R. J. Jones, J. Massanet-Nicolau, R. Fernandez-Feito, R. M. Dinsdale, A. J. Guwy
Summary: A novel combination of technologies was used to recover VFAs from a bioreactor, significantly increasing VFA yields and addressing end-product inhibition. These achievements represent important breakthroughs in adding value to waste and increasing substrate utilization rates.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Industrial
Andreas Hula, Rins de Zwart, Celina Mons, Wendy Weijermars, Hitesh Boghani, Pete Thomas
Summary: The aim of this article is to derive a functional relationship (dose-response curve) between the proportion of automated vehicles on the road (penetration rate) and the expected accident numbers/fatalities of interactions with vulnerable road users. Through analyzing current accident causes and comparing the reaction time of automated vehicles and human drivers, the potential reductions in accidents and fatalities can be estimated and expressed as a relationship between the proportion of automated vehicles and the accident numbers/fatality rates of accidents between motorized vehicles and vulnerable road users.
Review
Biotechnology & Applied Microbiology
Sanjay Nagarajan, Rhys Jon Jones, Lucy Oram, Jaime Massanet-Nicolau, Alan Guwy
Summary: This review focuses on the production of biohydrogen and VFAs from organic wastes. Through a critical analysis of recent literature, intensification strategies including substrate pre-treatment, digestion parameters, and product recovery are discussed. The techno-economic aspects and future research directions are highlighted.
FERMENTATION-BASEL
(2022)
Article
Engineering, Environmental
G. K. Veluswamy, K. Shah, A. S. Ball, A. J. Guwy, R. M. Dinsdale
Summary: There are concerns over the long-term sustainability of anaerobic digestion for producing methane, while the production of VFAs as a high value product offers promising opportunities for future wastewater treatment plants.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Tianyu Chen, Zhibin Lu, Guangjin Zeng, Yongmin Xie, Jie Xiao, Zhifeng Xu
Summary: The study introduces a high-performance LSGM electrolyte-supported tubular DC-SOFC stack for portable applications, which shows great potential in developing into high-performing, efficient, and environmentally friendly portable power sources for distributed applications.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Wenbin Tong, Yili Chen, Shijie Gong, Shaokun Zhu, Jie Tian, Jiaqian Qin, Wenyong Chen, Shuanghong Chen
Summary: In this study, a three-dimensional porous NiO interface layer with enhanced anode dynamics is fabricated, forming a Schottky contact with the zinc substrate, allowing rapid and uniform zinc plating both inside and below the interface layer. The resulting NiO@Zn exhibits exceptional stability and high capacity retention.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yafeng Bai, Kaidi Li, Liying Wang, Yang Gao, Xuesong Li, Xijia Yang, Wei Lu
Summary: In this study, a flexible zinc ion supercapacitor with gel electrolytes, porous alpha-MnO2@reduced graphene oxide cathode, and activated carbon/carbon cloth anode was developed. The device exhibits excellent electrochemical performance and stability, even at low temperatures, with a high cycle retention rate after 5000 cycles.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Anmol Jnawali, Matt D. R. Kok, Francesco Iacoviello, Daniel J. L. Brett, Paul R. Shearing
Summary: This article presents the results of a systematic study on the electrochemical performance and mechanical changes in two types of commercial batteries with different anode chemistry. The study reveals that the swelling of anode layers in batteries with silicon-based components causes deformations in the jelly roll structure, but the presence of a small percentage of silicon does not significantly impact the cycling performance of the cells within the relevant state-of-health range for electric vehicles (EVs). The research suggests that there is room for improving the cell capacities by increasing the silicon loading in composite anodes to meet the increasing demands on EVs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yohandys A. Zulueta, My Phuong Pham-Ho, Minh Tho Nguyen
Summary: Advanced atomistic simulations were used to study ion transport in the Na- and K-doped lithium disilicate Li2Si2O5. The results showed that Na and K doping significantly enhanced Li ion diffusion and conduction in the material.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Zongying Han, Hui Dong, Yanru Yang, Hao Yu, Zhibin Yang
Summary: An efficient phase inversion-impregnation approach is developed to fabricate BaO-decorated Ni8 mol% YSZ anode-supported tubular solid oxide fuel cells (SOFCs) with anti-coking properties. BaO nanoislands are successfully introduced inside the Ni-YSZ anode, leading to higher peak power densities and improved stability in methane fuel. Density functional theory calculations suggest that the loading of BaO nanoislands facilitates carbon elimination by capturing and dissociating H2O molecules to generate OH.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Suresh Mamidi, Dan Na, Baeksang Yoon, Henu Sharma, Anil D. Pathak, Kisor Kumar Sahu, Dae Young Lee, Cheul-Ro Lee, Inseok Seo
Summary: Li-CO2 batteries, which utilize CO2 and have a high energy density, are hindered in practical applications due to slow kinetics and safety hazards. This study introduces a stable and highly conductive ceramic-based solid electrolyte and a metal-organic framework catalyst to improve the safety and performance of Li-CO2 batteries. The optimized Li-CO2 cell shows outstanding specific capacity and cycle life, and the post-cycling analysis reveals the degradation mechanism of the electrodes. First-principles calculations based on density functional theory are also performed to understand the interactions between the catalyst and the host electrode. This research demonstrates the potential of MOF cathode catalyst for stable operation in Li-CO2 batteries.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Ganghua Xiang, Zhihuan Qiu, Huilong Fei, Zhigang Liu, Shuangfeng Yin, Yuen Wu
Summary: In this study, a CeFeOx-supported Pt single atoms and subnanometric clusters catalyst was developed, which exhibits enhanced catalytic activity and stability for the preferential oxidation of CO in H2-rich stream through synergistic effect.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Dimitrios Chatzogiannakis, Marcus Fehse, Maria Angeles Cabanero, Natalia Romano, Ashley Black, Damien Saurel, M. Rosa Palacin, Montse Casas-Cabanas
Summary: By coupling electrochemical testing to operando synchrotron based X-ray absorption and powder diffraction experiments, blended positive electrodes consisting of LiMn2O4 spinel (LMO) and layered LiNi0.5Mn0.3Co0.2O2 (NMC) were studied to understand their redox mechanism. It was found that blending NMC with LMO can enhance energy density at high rates, with the blend containing 25% LMO showing the best performance. Testing with a special electrochemical setup revealed that the effective current load on each blend component can vary significantly from the nominal rate and also changes with SoC. Operando studies allowed monitoring of the oxidation state evolution and changes in crystal structure, in line with the expected behavior of individual components considering their electrochemical current loads.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Chiara Cementon, Daniel Dewar, Thrinathreddy Ramireddy, Michael Brennan, Alexey M. Glushenkov
Summary: This Perspective discusses the specific power and power density of lithium-ion capacitors, highlighting the fact that their power characteristics are often underestimated. Through analysis, it is found that lithium-ion capacitors can usually achieve power densities superior to electrochemical supercapacitors, making them excellent alternatives to supercapacitors.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Weihao Wang, Hao Yu, Li Ma, Youquan Zhang, Yuejiao Chen, Libao Chen, Guichao Kuang, Liangjun Zhou, Weifeng Wei
Summary: This study achieved an improved electrolyte with excellent low-temperature and high-voltage performance by regulating the Li+ solvation structure and highly concentrating it. The electrolyte exhibited outstanding oxidation potential and high ionic conductivity under low temperature and high voltage conditions, providing a promising approach for the practical application of high-voltage LIBs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Martin Bures, Dan Gotz, Jiri Charvat, Milos Svoboda, Jaromir Pocedic, Juraj Kosek, Alexandr Zubov, Petr Mazur
Summary: Vanadium redox flow battery is a promising energy storage solution with long-term durability, non-flammability, and high overall efficiency. Researchers have developed a mathematical model to simulate the charge-discharge cycling of the battery, and found that hydraulic connection of electrolyte tanks is the most effective strategy to reduce capacity losses, achieving a 69% reduction.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
M. Rodriguez-Gomez, J. Campo, A. Orera, F. de La Fuente, J. Valenciano, H. Fricke, D. S. Hussey, Y. Chen, D. Yu, K. An, A. Larrea
Summary: In this study, we analysed the operando performance of industrial lead cells using neutron diffraction experiments. The experiments revealed the evolution of different phases in the positive electrode, showed significant inhomogeneity of phase distribution inside the electrode, and estimated the energy efficiency of the cells.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yang Wang, Kangjie Zhou, Lang Cui, Jiabing Mei, Shengnan Li, Le Li, Wei Fan, Longsheng Zhang, Tianxi Liu
Summary: This study presents a polyimide sandwiched separator (s-PIF) for improving the cycling stability of Li-metal batteries. The s-PIF separator exhibits superior mechanical property, electrolyte adsorption/retention and ion conductivity, and enables dendrite-free Li plating/stripping process.
JOURNAL OF POWER SOURCES
(2024)