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Co-optimization of energy management and eco-driving considering fuel cell degradation via improved hierarchical model predictive control

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Green Energy and Intelligent Transportation 2024年第6期3卷 1-14页

作者： Caixia Liu Yong Chen Renzong Xu Haijun Ruan Cong Wang Xiaoyu Li School of Mechanical Engineering Hebei University of TechnologyTianjin 300130China School of Mechanical Engineering Guangxi UniversityGuangxi 530004China Institute for Clean Growth&Future Mobility Coventry UniversityUK Tianjin Key Laboratory of New Energy Automobile Power Transmission and Safety Technology School of Mechanical EngineeringHebei University of TechnologyTianjin 300130China School of Vehicle and Mobility Tsinghua UniversityBeijing 100190China State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of TechnologyTianjin 300130China

An advanced eco-driving technology is widely recognized as having enormous potential to reduce the vehicle fuel ***,most research on eco-driving focuses on the stability and safety for vehicle operating while disregarding its comfort and *** meet the requirements for safety and comfort,at the same time,enhance the economic performance of the vehicles,an improved hierarchical model predictive control cooperative optimization strategy is proposed for fuel cell hybrid electric vehicle with car-following ***,the upper-level model predictive controller controls the velocity,inter-vehicle distance and acceleration to guarantee safety and comfort for *** to the velocity information obtained from the upper model predictive controller,the lower-level improved model predictive controller considers the impact of disturbance changes on vehicle economy and aims to minimize the vehicle operating cost considering fuel cell degradation,so as to allocate energy ***,the enhancement of economic performance of proposed strategy is verified with the results of comparative study that 3.09%economic improvement on the premise of assuring safety and comfort of driving.

关键词： Fuel cell hybrid electric vehicle Hierarchical model predictive control Car-following Eco-driving

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Fault diagnosis of satellite power system based on rough K-means clustering and fuzzy multi-attribute decision making 3

Fault diagnosis of satellite power system based on rough K-m...

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3rd International Conference on Electrical engineering and Mechatronics technology, ICEEMT 2023

作者： Xing, Jingyi Wang, Feng Ma, Ke Sun, Qilong Suo, Mingliang Institute of Reliability Engineering Beihang University Beijing100191 China National Key Laboratory of Science and Technology on Reliability and Environmental Engineering Beijing100191 China Beihang University School of Reliability and Systems Engineering Beijing100191 China Beijing Institute of Space Long March Vehicle Beijing100076 China

ISBN: (纸本)9798350303698

Fault diagnosis is an integral part of a satellite characterized by high autonomy, which is one of the fundamental guarantees to ensure the normal operation of the satellite. Clustering, as an unsupervised data mining method, is widely used in fault diagnosis. Regarding fault detection and isolation with the high real-time requirements, K-means clustering becomes a typical representative of effective diagnosis tools thanks to its fast-running characteristic. However, the stiff partition idea of K-means clustering seriously affects its results, and it may even lead to misdiagnosis. Therefore, to meet the need for faster and more accurate fault diagnosis of satellite, we introduce a clustering method combined with K-means and rough set, which utilizes the imprecise description characteristic of rough set to cluster samples flexibly. Subsequently, the clustering results are fed into a multi-attribute decision making model to generate a fuzzy decision-making model for fault diagnosis. Finally, the experimental results of fault diagnosis based on a satellite power system prove the effectiveness and superiority of our method. © 2023 IEEE.

关键词： Satellites

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Combination Weight Assignment Based on Rough Set and Information Entropy for Inertial Measurement Unit Evaluation 4

Combination Weight Assignment Based on Rough Set and Informa...

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4th International Conference on Signal Processing and Computer Science, SPCS 2023

作者： Ma, Ke Xu, Shengzhong Zhuang, Chunqing Xing, Jingyi Suo, Mingliang Institute of Reliability Engineering Beihang University Beijing100191 China National Key Laboratory of Science and Technology on Reliability and Environmental Engineering Beijing100191 China School of Reliability and Systems Engineering Beihang University Beijing100191 China Beijing Institute of Space Long March Vehicle Beijing100076 China

ISBN: (纸本)9781510672505

Inertial measurement unit (IMU) evaluation, which plays an important role in the selection, storage scheme design, maintenance plan formulation, etc. of IMU, often uses the multi-attribute decision-making (MADM) method and considers multidimensional information to produce a reliable result. To address the issues of bias and one-sidedness of a single weighting method, a combination weighting method based on a rough set and information entropy is raised in this paper. This proposed method, integrating the statistical characteristics of data, information features, and decision risk that are necessary factors for data-driven weight assignment, constructs a feasible set of weight assignment methods. Based on the information entropy, the importance of each method in the constructed set can be calculated. Subsequently, the comprehensive weights under the feasible set can be yielded with the help of the rough set theory-based redundancy elimination method. Finally, the feasibility and effectiveness of the proposed methods are verified by a practical engineering case, i.e., the accurate evaluation of IMU. © 2023 SPIE.

关键词： Rough set theory

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Intergranular Fracture Behaviour of ZK60 Magnesium Alloy Sheet by Combined CPFE-CZM and In-Situ SEM Method 14th

Intergranular Fracture Behaviour of ZK60 Magnesium Alloy She...

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14th International Conference on technology of Plasticity, ICTP 2023

作者： Meng, Linghui Wang, Chunhui Wang, Xiaoxue Zhang, Lipeng Qian, Lingyun Sun, Chaoyang School of Mechanical Engineering University of Science and Technology Beijing Beijing100083 China Beijing Key Laboratory of Lightweight Metal Forming Beijing100083 China Beijing Institute of Space Long March Vehicle Beijing100076 China

ISBN: (纸本)9783031413407

Magnesium alloy has the superiority of low density, excellent machinability and admirable dimensional stability, however, cause by it has the closely-arranged hexagonal crystal structure, there are a small amount independent slip systems at room temperature, that means poor plastic deformation ability. This investigation revealed the plastic deformation and fracture characteristics of magnesium alloy sheets by procedures of crystal plasticity (CP) and in-situ SEM experiments. The influence of the occurrence of the second-phase particles, grain boundaries distribution on the grain boundary cracks and grain boundaries damage on the microstructure morphology was analyzed by the observation and simulation. Results demonstrate that the damage evolution regulation along grain boundary of ZK60 magnesium alloy was verified by using investigation during plastic deformation, and the generation and propagation of microcracks on grain boundaries showed little difference with the experiments results. The presence of the second-phase particles is more likely to motivate the initiation of cracks at the grain boundary, which enables it easily to originate grain boundary fracture, and the crack predominantly distributes at the junction of grain boundaries or multiple grain boundaries. The final overall fracture is both related to the influence of local large cracks and the damage accumulation of the whole fracture path. Regulating the local damage distribution is beneficial to coordinating the overall damage. This study deepens the understanding of intergranular fracture, mechanical response and microstructure evolution of ZK60 magnesium alloy sheets during tensile deformation at room temperature. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Grain boundaries

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A Review of Intelligent vehicle Trajectory Tracking Control Methods Based on Overtaking Lane Change Scenarios 8th

A Review of Intelligent Vehicle Trajectory Tracking Control ...

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8th International Conference on Advances in Construction Machinery and vehicle engineering, ICACMVE 2023

作者： Yang, Dongzhao Hu, Lin Yi, Xiaojian Zhang, Xin School of Automotive and Mechanical Engineering Changsha University of Science and Technology Changsha410114 China School of Traffic and Transportation Engineering Changsha University of Science and Technology Changsha410114 China Hunan Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle Changsha University of Science and Technology Changsha410114 China

ISBN: (纸本)9789819718757

In order to achieve safe, comfortable, and stable control of lane-changing trajectories for intelligent vehicles, this paper reviews various trajectory tracking control methods for intelligent vehicles. Focusing on overtaking lane-changing trajectories, the paper provides a comprehensive review of research progress in PID, LQR, MPC, and SMC control methods both domestically and internationally. Striking a balance between addressing the challenges posed by non-integrity and multiple constraints of the vehicle, coping with the time-variability of the vehicle dynamics model, and ensuring the accuracy and computational efficiency of the vehicle model is essential for fostering the continuous development and enhancement of intelligent vehicle technology. © The Author(s) 2024.

关键词： Trajectories

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Design and performance analysis of the vacuum system for ion beam sputtering coating machine

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Vacuum 2025年 239卷

作者： Chen, Gengbiao Mo, Can College of Mechanical and Vehicle Engineering Changsha University of Science and Technology Changsha410114 China Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle Hunan Province Changsha410114 China

A high-performance vacuum system is a critical component of an ion beam sputtering (IBS) coating machine, as a clean, high-vacuum environment is essential for ensuring the quality and uniformity of sputtered coatings. This paper presents the design and performance analysis of a vacuum system tailored for IBS processes. A dual-chamber structure optimized for sputtering operations is proposed, and simulation results confirm stable gas flow and the absence of dead zones during main pump operation. Appropriate pump types are selected, and a vacuum system layout is developed to meet the stringent vacuum requirements of the coating process. To achieve accurate prediction of the system's evacuation time, a segmented pumping speed correction factor is introduced, enabling the construction of a sectional vacuum pumping model. Furthermore, a set of synchronized equipment operation commands is devised to realize efficient and automated vacuum pumping. The experimental results of the automated process closely match the model predictions. Compared to existing machines of the same type, the proposed system achieves ultimate vacuum nearly 2 h faster. © 2025 Elsevier Ltd

关键词： Vacuum pumps

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Optimisation study on the drain mode of cycloidal rotor oil pump

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International Journal of Industrial and Systems engineering 2022年第1期42卷 118-129页

作者： Wang, Wen Liu, Xiang Cai, Hao He, Shanghong Li, Yuelin Hunan Province Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle Changsha University of Science and Technology Changsha410114 China Hunan Oil Pump Co. Ltd. Hengyang421400 China

In order to optimise the internal flow field pulsation characteristics of a cycloidal rotor oil pump, the internal oil drain structure of the pressure limiting valve was changed to an external oil drain structure. The numerical simulation method is used to calculate the internal flow field of the cycloidal oil pump with different drain structures. The outlet pressure pulsation, pressure pulsation at the pressure limiting valve, displacement of the pressure limiting valve spool and cavitation are compared and analysed. The results show that, relative to internal drain structure, the pressure amplitude of the external drain structure at the pressure limiting valve is reduced by 30%, the pressure amplitude at the outlet is reduced by 25%, and the cavitation phenomenon at the interface between the pressure limiting valve and the inlet cavity is eliminated. The bench test is carried out to verify the sample pump, and the test results are in good agreement with the simulation results, with the volume efficiency improved by up to 4%. Copyright © 2022 Inderscience Enterprises Ltd.

关键词： Flow fields

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Corrosion evolution and behaviour of Al-2.1Mg-1.6Si alloy in chloride media

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Rare Metals 2021年第4期40卷 908-919页

作者： Ya-Ya Zheng Bing-Hui Luo Chuan He Yang Gao Zhen-Hai Bai College of Materials Science and Engineering Central South UniversityChangsha 410083China Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle Changsha University of Science and TechnologyChangsha 410114China

Owing to the importance of finding better methods and technologies for protecting against corrosion of aluminium alloys,research into the electrochemical characteristics of the corrosion is an ongoing *** this paper,the corrosion behaviour of Al-Mg-Si alloys in 3.5 wt% NaCl solution was investigated using multiple methods,including scanning electron microscopy(SEM),transmission electron microscopy(TEM),potentiodynamic polarisation measurement and electrochemical impedance spectroscopy(EIS).The results suggest that corrosion begins with dealloying of Mg,followed by conversion of MgSi particles into Al-Fe-Mn-Si *** corrosion rate increased until it reached a peak and then *** increase in the corrosion rate may be attributed to an increased electrochemical driving force,which is produced by anodic dissolution between the matrix and residual MgSi ***,the thin re-deposited layer of inert elements also plays an important role in accelerating the anodic process of the corrosion *** passivated corrosion pit and narrowed intergranular corrosion(IGC)pathway cause the area of active dissolution to decrease,thus reducing the corrosion rate.

关键词： Al-Mg-Si alloys Corrosion behaviour Electrochemical Corrosion rate IGC corrosion pathway

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A Review on Safety Management Strategies: Theory and Practical Application of Lithium-Ion Power Batteries 8th

A Review on Safety Management Strategies: Theory and Practic...

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8th International Conference on Advances in Construction Machinery and vehicle engineering, ICACMVE 2023

作者： Yi, Xiaojian Hu, Lin Liu, Shuang Zou, Changfu School of Traffic and Transportation Engineering Changsha University of Science and Technology Changsha410114 China School of Automotive and Mechanical Engineering Changsha University of Science and Technology Changsha410114 China Hunan Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle Changsha University of Science and Technology Changsha410114 China Department of Electrical Engineering Chalmers University of Technology Gothenburg41296 Sweden

ISBN: (纸本)9789819718757

Battery safety in electric vehicles is a comprehensive engineering endeavor that requires meticulous consideration at every stage, including battery materials, battery pack design, and battery management systems (BMS). This review focuses on safety management strategies and practical applications of lithium-ion power batteries. The management of battery safety primarily encompasses charge and discharge safety, high-voltage safety, and thermal safety. Among these, charge and discharge safety management aims to prevent battery damage or safety incidents caused by overcharge or over discharge. High-voltage safety management involves detecting insulation faults, overcurrent, and other potential risks to prevent electrical hazards. Thermal safety management ensures individual battery cells, modules, and the battery pack maintain an optimal operating temperature range and uniform temperature distribution, thereby preventing thermal runaway. © The Author(s) 2024.

关键词： Lithium-ion batteries

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A Research of Different Energy Management Strategies of Lithium-ion Battery-Ultracapacitor Hybrid Energy Storage System 8th

A Research of Different Energy Management Strategies of Lith...

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8th International Conference on Advances in Construction Machinery and vehicle engineering, ICACMVE 2023

作者： Zhang, Dongjie Hu, Lin Tian, Qingtao Zou, Changfu School of Automotive and Mechanical Engineering Changsha University of Science and Technology Changsha410114 China Hunan Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle Changsha University of Science and Technology Changsha410114 China School of Traffic and Transportation Engineering Changsha University of Science and Technology Changsha410114 China Department of Electrical Engineering Chalmers University of Technology Gothenburg41296 Sweden

ISBN: (纸本)9789819718757

Given the exacerbating effect of fossil fuel use in conventional vehicles on the greenhouse effect, the imperative development of electric vehicle technology becomes evident. To address the high energy and power density demands of electric vehicles, a lithium-ion battery-ultracapacitor hybrid energy storage system proves effective. This study, utilizing ADVISOR and Matlab/Simulink, employs an electric vehicle prototype for modeling and simulating both logic threshold and fuzzy logic control strategies. It aims to analyze the average output power and state of charge (SOC) of the lithium-ion battery, as well as the SOC of the ultracapacitor, within hybrid energy storage systems governed by these differing strategies. The findings indicate that the fuzzy logic control strategy results in a reduction of 2.73 kW in the average output power of the lithium-ion battery and a 20% increase in the SOC drop rate of the ultracapacitor compared to the logic threshold control strategy. Under the logic threshold control strategy, lithium-ion batteries demonstrate superior output stability, albeit within a broader amplitude range. Conversely, the fuzzy logic control strategy maximizes the utilization of ultracapacitors but leads to frequent fluctuations in the output power of lithium-ion batteries, thereby exhibiting reduced stability. These results underscore the inherent trade-offs between stability and utilization efficiency in hybrid energy storage systems for electric vehicles under different control strategies. The selection of a control strategy should be contingent upon specific performance priorities and objectives within the context of electric vehicle design and operation. © The Author(s) 2024.

关键词： Lithium-ion batteries

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