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2022 International Conference on Optoelectronic Information and Functional Materials, OIFM 2022

作者： Shen, Chuanliang Yu, Jing Xu, Xiaodong Zheng, Chengfeng Li, Shengnan State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China

ISBN: (数字)9781510655126

ISBN: (纸本)9781510655119

The driving characteristics of SMA actuators mainly include the range, force and speed of the actuator, and these driving characteristics are determined by the alloy composition and use conditions. The alloy composition and service conditions affect the stress, strain and phase transformation speed of the SMA wire during the phase transformation, and affect the driving characteristics of the SMA wire. Using the shape memory alloy seat drive element with one-way shape memory effect, two-way drive can be realized under the action of bias force. The driving characteristics of alloy wires under the action of different constant loads and bias springs with different stiffness, including the influence laws of driving displacement, driving force and response time. © 2022 SPIE.

关键词： Phase transitions

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An Integrated GNSS/INS/DR Positioning Strategy Considering Nonholonomic Constraints for Intelligent Vehicle 6

An Integrated GNSS/INS/DR Positioning Strategy Considering N...

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6th CAA International Conference on Vehicular control and Intelligence, CVCI 2022

作者： Chen, Guo-Ying Wang, Jia-Qi Hu, Hong-Yu Jilin University State Key Laboratory of Automotive Simulation and Control Changchun China

ISBN: (数字)9781665453745

ISBN: (纸本)9781665453745

The realization of decision-making, trajectory planning, and motion control of intelligent vehicles highly depends on the precise and continuous position information. To provide reliable pose information during GNSS (Global Navigation Satellite Systems)outage, an integrated position strategy based on the GNSS, INS (Inertial Navigation System), DR (dead reckoning) considering nonholonomic constraints (NHC) was proposed in this paper. First, a positioning algorithm of GNSS/INS was established using an Error state Kalman Filer (ESKF). Nonholonomic constraints and vehicle speed were used to correct the navigation error to improve positioning accuracy. Then, the available time of the algorithm during GNSS signal outage was further extended by designing a DR system based on vehicle dynamics. An Extended Kalman Filter (EKF) was used to process the nonlinear system and the information of wheel speed and front wheel angle were integrated into the system. Finally, the fusion positioning algorithm was validated by NI HIL platform. The results showed that, during GNSS outage, the positioning strategy proposed in this paper could reduce the root means square errors (RMSE) of positioning accuracy, compared to the GNSS/INS positioning algorithm, by 78.2% along x-axis and 83.0% along y-axis. © 2022 IEEE.

关键词： Inertial navigation systems

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Synergistic promotion of particulate matter reduction and production performance via adjusting electrochemical reactions in the zinc electrolysis industry

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Frontiers of Environmental Science & engineering 2024年第1期18卷 23-33页

作者： Zizhen Ma Jingkun Jiang Lei Duan Jianguo Deng Fuyuan Xu Zehui Li Linhua Jiang Ning Duan School of Environmental and Municipal Engineering Qingdao University of TechnologyQingdao 266520China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of the EnvironmentTsinghua UniversityBeijing 100084China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China School of Physics Peking UniversityBeijing 100871China

Heavy particulate matter (PM) pollution and high energy consumption are the bottlenecks of hydrometallurgy, especially in the electrolysis process. Therefore, an urgent need is to explore PM reduction methods with production performance co-benefits. This study presents three PM reduction methods based on controlling operating parameters, i.e., lowering electrolyte temperature, H2SO4 concentration, and current density of the cathode. The optimized conditions were also investigated using the response surface methodology to balance the PM reduction effect and Zn production. The results showed that lowering electrolyte temperature is the most efficient, with an 89.0% reduction in the PM generation flux (GFPM). Reducing H2SO4 concentration led to the minimum side effects on the current efficiency of Zn deposition (CEZn) or power consumption (PC). With the premise of non-deteriorating CEZn and PC, GFPM can be reduced by 86.3% at the optimal condition (electrolyte temperature = 295 K, H2SO4 = 110 g/L, current density = 373 A/m^(2)). In addition, the reduction mechanism was elucidated by comprehensively analyzing bubble characteristics, electrochemical reactions, and surface tension. Results showed that lower electrolyte temperature inhibited the oxygen evolution reaction (OER) and compressed gas volume. Lower H2SO4 concentration inhibited the hydrogen evolution reaction (HER) and reduced electrolyte surface tension. Lower current density inhibited both OER and HER by decreasing the reaction current. The inhibited gas evolutions reduced the microbubbles’ number and size, thereby reducing GFPM. These results may provide energy-efficient PM reduction methods and theoretical hints of exploring cleaner PM reduction approaches for industrial electrolysis.

关键词： Zinc electrolysis Particulate matter Energy consumption Operating parameters Bubble characteristic Electrochemical reaction

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Research on Integrated Thermal Management System Test Technology of Electric Vehicle 9

Research on Integrated Thermal Management System Test Techno...

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9th International Conference on Mechanical engineering, Materials, and Automation Technology, MMEAT 2023

作者： Fu, Yu Li, Zeyu Wang, Fang State Key Laboratory of Automotive Simulation and Control Changchun130022 China Co. Ltd. Tianjin300300 China

ISBN: (纸本)9781510668584

The development of integrated thermal management system for the improvement of environmental adaptability and comprehensive energy efficiency of new generation electric vehicles has become the development trend of the industry, but its coupling between systems is strong and development is difficult, so it needs system integration test to assist development. The integrated test technology of thermal management system is reviewed from the characteristics of integrated thermal management system, the research status of system integration test technology and the technical conditions of bench test. Focusing on meeting the technical requirements of real vehicle scenario in bench test environment and customization of test conditions, this paper analyzes in detail the research progress and technical application of key technologies such as the real-time calculation method of system simulation of real vehicle operation air intake and the accurate control of transient air supply and temperature stability control under low speed condition, puts forward the current problems of system integration test and predicts the development direction. © 2023 SPIE.

关键词： Energy efficiency

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Generation of a scenario library for testing driver-automation cooperation safety under cut-in working conditions

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Green Energy and Intelligent Transportation 2022年第2期1卷 1-8页

作者： Hongyan Guo Jiaming Zhang Jun Liu Yunfeng Hu Wanqing Shi College of Communication Engineering Jilin UniversityRenmin Street 5988Changchun130012China The State Key Laboratory of Automotive Simulation and Control Jilin UniversityRenmin Street 5988Changchun130012China College of Automotive Engineering Jilin UniversityRenmin Street 5988Changchun130012China

To improve the efficiency of safety tests of driver-automation cooperation,a method for generating a scenario library is proposed that considers the probability of scenario occurrence and driver-handling challenges in real driving ***,the original scenario data under cut-in conditions stored in a time series are extracted from the scenario data ***,a mathematical performance index is used to model the scenario and a significance function in terms of the occurrence frequency of the scenario,and the performance challenge between the driver and the vehicle is ***,the important scenario set is extracted from the original scenario set by constructing and optimizing a significance auxiliary ***,the extracted important scenario sets are filtered by using the significance function values of the scenarios to generate a scenario *** results show that the proposed method for scenario library generation can effectively identify scenarios with potential adventure during driver-automation cooperation and thus accelerate safety tests compared with traditional methods.

关键词： Scenario library generation Cut-in working condition Driver-automation cooperation Performance challenge Significance function

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Open-source dataset of vehicle state for an electric vehicle on a low-adhesion road

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Science China(Information Sciences) 2022年第3期65卷 258-259页

作者： Shuo CAI Haitao DING Yunfeng HU Lin ZHANG Qin LI Hong CHEN State Key Laboratory of Automotive Simulation and Control Jilin University Department of Control Science and Engineering Jilin University School of Automotive Studies Tongji University Collaborative Innovation Center of Electric Vehicles in Beijing Beijing Institute of Technology GAC R&D Center

This study demonstrates and opens for academic research six sets of electric vehicle data collected during experiments on a low-adhesion road. The 11-dimensional data were collected from a small, single-motor SUV with front-wheel *** data collected for vehicles on low-adhesion roads are crucial for research on system dynamics modeling,stability control system design, and vehicle state estimation. Indeed, all vehicle control systems must be validated on low-adhesion roads, including vehicle models,

关键词： vehicle experimental data dynamics modeling state estimation control system design low adhesion road

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Driver-automation shared steering control considering driver neuromuscular delay characteristics based on stackelberg game

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Green Energy and Intelligent Transportation 2022年第2期1卷 88-96页

作者： Jun Liu Hongyan Guo Wanqing Shi Qikun Dai Jiaming Zhang State Key Laboratory of Automotive Simulation and Control Jilin UniversityRenmin Street 5988Changchun130025China College of Communication Engineering Jilin UniversityRenmin Street 5988Changchun130025China

To promote the intelligent vehicle safety and reduce the driver steering workload,stackelberg game theory is adopted to design the shared steering control strategy that takes the driver neuromuscular delay characteristics into ***,a shared steering control framework with adjustable driving weight is proposed,and a coupling interaction model considering the driver neuromuscular delay characteristics is constructed by using the stackelberg game ***,the driver-automation optimal control strategy is deduced theoretically when the game equilibrium is ***,simulation and virtual driving tests are carried out to verify the superiority of the proposed *** results illustrate that the raised method can enhance the vehicle safety with low driving weight intervention,and it can achieve better auxiliary effect with less control *** addition,the driver-in-the-loop test results show that the proposed strategy can achieve better performance in assisting drivers with low driving skills.

关键词： Shared steering control Game theory Driver-automation interaction Driver neuromuscular delay characteristics

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Characterization and prediction of tailpipe ammonia emissions from in-use China 5/6 light-duty gasoline vehicles

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Frontiers of Environmental Science & engineering 2024年第1期18卷 71-81页

作者： Lewei Zeng Fengbin Wang Shupei Xiao Xuan Zheng Xintong Li Qiyuan Xie Xiaoyang Yu Cheng Huang Qingyao Hu Yan You Ye Wu College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China State Key Laboratory of Engines Tianjin UniversityTianjin 300072China China Automotive Technology and Research Center Co.Ltd. Tianjin 300300China CATARC Automotive Test Center(Guangzhou)Co.Ltd. Guangzhou 511300China State Environmental Protection Key Laboratory of Cause and Prevention of Urban Air Pollution Complex Shanghai Academy of Environmental SciencesShanghai 200233China National Observation and Research Station of Coastal Ecological Environments in Macao Macao Environmental Research InstituteMacao University of Science and TechnologyMacao SAR 999078China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution ControlTsinghua UniversityBeijing 100084China

On-road tailpipe ammonia (NH3) emissions contribute to urban secondary organic aerosol formation and have direct or indirect adverse impacts on the environment and human health. To understand the tailpipe NH3 emission characteristics, we performed comprehensive chassis dynamometer measurements of NH3 emission from two China 5 and two China 6 light-duty gasoline vehicles (LDGVs) equipped with three-way catalytic converters (TWCs). The results showed that the distance-based emission factors (EFs) were 12.72 ± 2.68 and 3.18 ± 1.37 mg/km for China 5 and China 6 LDGVs, respectively. Upgrades in emission standards were associated with a reduction in tailpipe NH3 emission. In addition, high NH3 EFs were observed during the engine warm-up period in cold-start cases owing to the intensive emissions of incomplete combustion products and suitable catalytic temperature in the TWCs. Notably, based on the instantaneous NH3 emission rate, distinct NH3–emitting events were detected under high/extra high velocity or rapid acceleration. Furthermore, NH3 emission rates correlated well with engine speed, vehicle specific power, and modified combustion efficiency, which were more easily accessible. These strong correlations were applied to reproduce NH3 emissions from China 5/6 LDGVs. The predicted NH3 EFs under different dynamometer and real-world cycles agreed well with existing measurement and prediction results, revealing that the NH3 EFs of LDGVs in urban routes were within 8.55–11.62 mg/km. The results presented here substantially contribute to improving the NH3 emission inventory for LDGVs and predicting on-road NH3 emissions in China.

关键词： NH3 instantaneous emissions Catalytic temperature Vehicle specific power Combustion efficiency Emission prediction

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Simultaneous refinement of α-Mg grains and β-Mg_(17)Al_(12) in Mg-Al based alloys via heterogeneous nucleation on Al_(8)Mn_(4)Sm

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Journal of Magnesium and Alloys 2023年第1期11卷 348-360页

作者： Jun-Chen Chen Mei-Xuan Li Zhi-Yang Yu Zhao-Yuan Meng Cheng Wang Zhi-Zheng Yang Hui-Yuan Wang State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130012PR China Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering Jilin UniversityNanling CampusNo.5988 Renmin StreetChangchun 130025PR China International Center of Future Science Jilin UniversityChangchun 130012PR China

Due to the significant differences in the formation temperature and crystal structure between the primaryα-Mg and eutecticβ-Mg_(17)Al_(12),it is a great challenge to achieve simultaneous refinement of the primary and eutectic phases in Mg-Al based alloys via heterogeneous ***,we found that theα-Mg andβ-Mg_(17)Al_(12) in the AZ80 alloy can be simultaneously refined after 0.2 wt.%Sm addition,with the grain size decreasing from∼217±15μm to∼170±10μm and theβ-Mg_(17)Al_(12) morphology changing from a typical continuous network to a nod-like or spherical *** simultaneous refinement mechanism is investigated through solidification simulation,transmission electron microscopy(TEM),and differential thermal analysis(DTA).In the AZ80-0.2Sm alloy,many Al8Mn4Sm particles can be observed near the center of theα-Mg grains or inside theβ-Mg_(17)Al_(12).Crystallographic calculations further reveal that the Al8Mn4Sm has good crystallographic matching with both theα-Mg andβ-Mg_(17)Al_(12),so it possesses the potency to serve as heterogeneous nucleation sites for both *** promoted heterogeneous nucleation on the Al8Mn4Sm decreases the undercooling required by the nucleation of the primary and eutectic phases,which enhances the heterogeneous nucleation rate,thus causing the simultaneous refinement of theα-Mg andβ-Mg_(17)Al_(12).The orientation relationships between the Al8Mn4Sm and Mg/Mg_(17)Al_(12) are identified,which are[1210]_(Mg)//[010]_(Al8Mn4Sm),(1010)_(Mg)//(301)_(Al8Mn4Sm) and[112]_(Mg_(17)Al_(12))//[010]_(Al8Mn4Sm),(110)_(Mg_(17)Al_(12))//(301)_(Al8Mn4Sm),***,the refinement of theβ-Mg_(17)Al_(12) accelerates its dissolution during the solution treatment,which is beneficial for cost saving in industrial *** Al8Mn4RE compounds such as Al8Mn4Y might have the same positive effect on the simultaneous refinement due to the similar physicochemical properties of rare earth *** work not only proves the po

关键词： Magnesium alloys Microstructure refinement Primaryα-Mg Eutecticβ-Mg_(17)Al_(12) Rare earth Heterogeneous nucleation

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Research and Design of Soft Switch Technology in New Energy Vehicle Wireless Charging System

Research and Design of Soft Switch Technology in New Energy ...

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作者： Wang, Jun Liu, Qiang Huo, Jinming Cantero, Rosa School of Automotive Engineering of Jilin Engineering Normal University Jilin Changchun China Jilin Changchun China State Key Laboratory of Automotive Simulation and Control Jilin University Jilin Changchun China University of Frankfurt Frankfurt Germany

Wireless power supply technology as an emerging new energy vehicle power real-time supply technology to the development of new energy vehicles has brought a lot of convenience. The wireless power supply technology of new energy vehicles can reduce the amount of on-board batteries and even do not need to carry batteries. By laying the guide rail under the road, the electric energy is transmitted to the car in a non-electric contact way using electromagnetic technology for real-time use. However, the transmission efficiency of the wireless power supply system for new energy vehicles is not high, which greatly increases the loss of the system and reduces the effective energy supply of the system. The soft switching technology proposed in this paper can control the switching appliance under the zero voltage and zero current environment, so as to reduce the circuit switching loss. Therefore, soft switch technology is widely used in wireless power supply device can effectively improve the efficiency of the whole system. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Secondary batteries

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