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2021 7th International Conference on Manufacturing technology and Applied Materials, ICAMMT 2021

作者： Chen, Kailun Li, Qizhong Wang, Yujiu Huang, Miaohua Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan430070 China Hubei Research Center for New Energy and Intelligent Connected Vehicle Wuhan University of Technology Wuhan430070 China

In order to achieve accurate online State of health estimation of power battery, this paper proposes a method based on voltage integration and temperature. Based on the NASA ternary lithium battery accelerated life test, three groups of battery experimental data are divided according to the difference in temperature and discharge rate. According to the single battery data and battery experimental data required to record in the Chinese national standard documents, the feasibility of voltage integration as a characterization of battery health is verified. Then we discussed the charging and discharging behavior of electric vehicles and combine the Particle Swarm Optimization algorithm to select the voltage integral of the fixed voltage interval in the charging stage as the equivalent health factor of the battery health state, and establish a battery health state estimation model based on the Gaussian process regression with the temperature and voltage integral as input. The proposed method is verified by experimental data. The proposed method is suitable for online estimation of battery health status under different temperatures and different discharge rates. The root mean square error and average absolute error of battery health status estimation are both less than 1.4%. © Published under licence by IOP Publishing Ltd.

关键词： Charging (batteries)

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Construction of 540° Panoramic Image of Vehicles Based on Video Spatiotemporal Sequence Stitching 7

Construction of 540° Panoramic Image of Vehicles Based on V...

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2022 7th International Conference on Electronic technology and Information Science, ICETIS 2022

作者： Liu, Xuemiao Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan430070 China Hubei Research Center for New Energy and Intelligent Connected Vehicle Wuhan University of Technology Wuhan430070 China

ISBN: (纸本)9783800757794

There are not only visual blind spots such as the front, rear, and A-pillars of the vehicle during driving, but also the environment under the vehicle chassis is also important for driving safety. Aiming at the problem that the traditional Around View Monitor (AVM) system only displays the environmental information around the vehicle body, a 540° AVM system based on video spatiotemporal sequence image stitching is proposed. This paper aims to reproduce and display the blind spots around and at the bottom of the vehicle, based on image processing methods such as camera calibration, image registration fusion, and video sequence stitching. First, a group of fisheye cameras and wheel speed sensors are installed on the vehicle, and the perspective transformation matrix is calculated by calibrating the camera parameters and the relative position relationship of each camera, and then the original image is converted into a bird's-eye view. Then, the 360° and 180° panorama images are obtained by image stitching and fusion using the spatial relative position relationship of multiple cameras and video sequences at different moments from the same camera. Finally, the two are fused again to obtain a 540° panoramic image. The experimental results show that the method can effectively eliminate the visual blind spot, display the surrounding environment of the vehicle without dead angle, and improve the driving safety. © VDE VERLAG GMBH ∙ Berlin ∙ Offenbach.

关键词： Display devices

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Lane Line Detection Based on Dynamic ROI and Adaptive Thresholding Segmentation 6

Lane Line Detection Based on Dynamic ROI and Adaptive Thresh...

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6th International Conference on Electronic Information technology and Computer Engineering, EITCE 2022

作者： Yang, Xin Yu, Houyu Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan430070 China Hubei Research Center for New Energy & Intelligent Connected Vehicle Wuhan University of Technology Wuhan430070 China

ISBN: (纸本)9781450397148

Aiming at the problem of large error in detecting lane lines on curved, long distance and complex roads by autonomous vehicles, a lane line detection algorithm based on dynamic ROI (Region Of Interest) and adaptive thresholding segmentation is proposed. According to the principle of inverse perspective transform, the original image is converted into an aerial view, and then the aerial view is preprocessed to calculate the gray column mean and full mean to dynamically determine the ROI. The image array is expanded for differentiation calculation. The adaptive threshold segmentation is carried out according to the characteristics of partition. The area and transverse and longitudinal span of each connected area in the binary diagram are calculated, and the interference factors are filtered out as required. Using the curve fitting algorithm of RANSAC (RANdom SAmple Consensus), the quadratic polynomial is defined as the target curve model to fit the characteristic points of lane line. The results show that the algorithm can accurately detect the lane lines under various road conditions. © 2022 Association for Computing Machinery.

关键词： Antennas

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High Purity Hydrogen Production by Metal Hydride System:A Parametric Study Based on the Lumped Parameter Model

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Journal of Wuhan University of technology(Materials Science) 2021年第1期36卷 127-135页

作者： KOUA Koua Alain Jesus TONG Liang YANG Tianqi XIAO Jinsheng School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Advanced Technology for Automotive Components Hubei Collaborative Innovation Center for Automotive Components Technology and Hubei Research Center for New Energy&Intelligent Connected VehicleWuhan University of TechnologyWuhan 430063China Reliability Engineering Institute School of Energy and Power EngineeringWuhan University of TechnologyWuhan 430070China Hydrogen Research Institute Universitédu QuébecàTrois-RivièresQC G9A 5H7Canada

The simulation of hydrogen purification in a mixture gas of hydrogen/carbon dioxide (H2/CO2) by metal hydride system was *** lumped parameter model was developed and *** validated model was implemented on the software Matlab/Simulink to simulate the present *** simulation results demonstrate that the purification efficiency depends on the external pressure and the venting *** increase in the external pressure and enough venting time makes it possible to effectively remove the impurities from the tank during the venting process and allows to desorb pure *** impurities are partially removed from the tank for low external pressure and venting time during the venting process and the desorbed hydrogen is *** parameters such as the overall heat transfer coefficient,solid material mass,supply pressure,and the ambient temperature influence the purification system in terms of the hydrogen recovery *** increase in the overall heat transfer coefficient,solid material mass,and supply pressure improves the hydrogen recovery rate while a decrease in the ambient temperature enhances the recovery rate.

关键词： hydrogen production hydrogen purification carbon dioxide metal hydride lumped parameter parametric study

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The aging pattern of lithium-ion batteries based on experiments at different temperatures 3

The aging pattern of lithium-ion batteries based on experime...

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2024 3rd International Conference on Green Energy and Power Systems, ICGEPS 2024

作者： Cui, Yugang Wang, Xiao Zou, Shibo Wang, Qian Kang, Jianqiang Three Gorges Electric Energy Co. Ltd. Hubei Wuhan430000 China Hubei Key Laboratory of Advanced Technology for Automotive Components Hubei Wuhan430070 China School of Automation Wuhan University of Technology Hubei Wuhan430070 China

In this paper, we take an 18650-type LiFePO4 battery as the research object to investigate the aging mechanism of Li-ion batteries at different temperatures. The aging tests are conducted at 25°C, 35°C and 45°C. The results show that elevating the operating temperature can improve the cycle life of Li-ion batteries. The aging mechanism was analyzed by incremental capacity and electrochemical impedance spectrum analysis. The following conclusions were obtained: the aging mechanism of lithium-ion batteries mainly includes loss of lithium inventory, loss of active material, and conductivity loss, among which loss of lithium inventory and loss of active material are the main causes of Li-ion battery aging, and the contribution of conductivity loss is the smallest. Further analysis of the causes of battery aging by disassembling and testing the aging electrode sheet SEM and TEM shows that the aging of Li-ion battery is manifested by the rupture of graphite particles, the generation of SEI layer and lithium dendrite, and increasing the temperature can ease the rupture of graphite particles and the generation of lithium dendrite, thus improving the cycle life of the battery. © Published under licence by IOP Publishing Ltd.

关键词： Lithium-ion batteries

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Deformation Mechanism of the Tooth Material Filling for Precision Forging of Spur Gears 13th

Deformation Mechanism of the Tooth Material Filling for Prec...

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13th International Conference on the technology of Plasticity, ICTP 2021

作者： Feng, Wei Feng, Zengjie Zhou, Mengjuan Mao, Ling Jia, Xiangyang School of Materials Science and Engineering Wuhan University of Technology 430070 Wuhan Hubei China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan Hubei430070 China Hubei Engineering Research Center for Green Precision Material Forming 430070 Wuhan Hubei China

ISBN: (纸本)9783030753801

Spur gears are an important transmission part used widely in many industries. Precision forging of spur gears has a lot of advantages compared with the conventional mechanical cutting method. However, it is very difficult to fill the corner well and the forging load is also very large, especially in the final forming stage during the precision forging of spur gears. So, a three-dimensional (3D) finite element (FE) model for precision forging of spur gears was built by DEFORM-3D software. The stress and strain states in different forming stages and positions of billet have been studied. Also, the Lode parameter μσ was calculated, and the metal flow line method was used to reveal the deformation mechanism of the tooth material. Results show that the Lode parameter of the tooth shape is negative at the beginning of the tooth filling and is positive at the final stage of the tooth filling. Also, the stress state changes from two-directional compressive stress and one-directional tensile stress to three-directional compressive stress. © 2021, The Minerals, Metals & Materials Society.

关键词： Spur gears

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The Organic Medium Physical State Analysis for Engine Exhaust Thermal Recovery

The Organic Medium Physical State Analysis for Engine Exhaus...

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SAE 2015 World Congress and Exhibition

作者： Shen, Xiaomeng Tan, Gangfeng Zhou, Quan Yang, Zhongjie Hua, Min Wuhan University of Technology School of Economics Wuhan430010 China Wuhan University of Technology School of Automotive Engineering Hubei Key Laboratory in Advanced Technology for Automotive Components Wuhan430010 China

The Organic Rankine Cycle System is an effective approach for recovering the engine exhaust thermal energy. The physical characteristic of the Rankine fluid is the key factor for the capacity and the stability of the expander power output. In the research, the influences of the evaporator organic medium state and flow rate on the expander power output are fully analyzed for the sufficient utilization of the waste thermal energy. Firstly, the exhaust characteristics of the diesel engine were processed by the data of the bench test. Then, the integral mathematical model of the Organic Rankine Cycle was built. Based on the comparison for the 2-zone and 3-zone evaporator, the influence for expander output are analyzed especially emphasis on the factors of engine working condition, the flow rate, temperature and state of Rankine fluid. The result shows that the thermal energy recovery efficiency could be optimized by the matching for engine and ORC system and the precise control of the physical state of the ORC Rankine fluid. Copyright © 2015 SAE International.

关键词： Rankine cycle

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Control of Fixed-wing UAV Using Optimized PID Controller with the Adaptive Genetic Algorithm

Control of Fixed-wing UAV Using Optimized PID Controller wit...

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2022 IEEE International Conference on Real-Time Computing and Robotics, RCAR 2022

作者： Yu, Xincheng Yan, Lirong Guan, Zhizhou Wu, Yibo Peng, Fuming Yan, Fuwu Wuhan University of Technology Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan430070 China Tumxuk Xinguang Jingwei UAV Technology Co. Ltd Tumxuk843999 China

ISBN: (数字)9781665469838

ISBN: (纸本)9781665469838

Aiming at the time-varying and nonlinear problems of fixed-wing unmanned aerial vehicle (UAV) system, a UAV flight control algorithm was proposed based on PID control algorithm and the adaptive genetic algorithm (GA). On the basis of the traditional algorithm, the settling time was considered as the influencing factors of the objective function. The optimal index was determined by using the overshoot, rise time and settling time of the system response as variables, and adjusting the corresponding weight according to the actual situation to change the system response result. Moreover, the crossover probability and mutation probability in GA could be adaptively changed, so that the optimal parameters in the PID control process could be quickly and accurately found. Based on the rigid body dynamics model and kinematic model of the fixed-wing UAV, the simulation models of five control loops were designed in MATLAB/Simulink, namely the pitch angle, roll angle, yaw angle, speed and height control loops. Compared with the traditional PID controller, the system responses of the five control loops were significantly improved with faster response speed, and less than 5% overshoot. The proposed algorithm had strong adaptability and anti-interference ability. © 2022 IEEE.

关键词： Three term control systems

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Research and Simulation of ABS Control Method

Research and Simulation of ABS Control Method

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2014 International Conference on Energy Science and Applied technology(ESAT 2014)

作者： Wei Zhang Guanneng Xu Xuexun Guo Wen Zhang Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Guangxi Automobile and Tractor Research Institute Hubei Collaborative Innovation Center for Automotive Components Technology

Based on the ABS model of a single wheel system,the traditional logic threshold,PID and fuzzy control method have been used to study the control system of commercial vehicle's *** the most important task of commercial vehicle's ABS is to prevent the two front(steering) wheels from locking,the slip ratio should be controlled strictly in the safe range.A very short time of locking may cause the failure of steering,so control method which can keep slip ratio in the secure scope accurately can help vehicle avoid the danger of *** up the model on Simulink ***,use the three control methods to control the *** comparing and analyzing the processes and results under the control methods,find an appropriate way that can provide the most secure and effective *** the perspective of processes(slip ratio changes),the simulations under the three control methods show the PID control gives the best slip ratio *** curve is almost coinciding with the ideal slip ratio *** oscillation of slip ratio given by fuzzy control is the most *** the point of view of the results(braking distance),the braking system with PID control has the shortest braking distance while with the fuzzy control has the *** is not to say fuzzy control is not advanced but the actual experiences difficult to *** with the long response time,the fuzzy control is not suitable for commercial vehicle's *** a result and with the development and decreasing cost of PID controller,it is competitive in today's ABS market.

关键词： ABS control methods

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PID and Velocity Feedback Control for ABS based on Wheel Slip

PID and Velocity Feedback Control for ABS based on Wheel Sli...

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2014 International Conference on Energy Science and Applied technology(ESAT 2014)

作者： Wei Zhang Guanneng Xu Xuexun Guo Wen Zhang Bin Wang Ming Chen Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Guangxi Automobile and Tractor Research Institute Hubei Collaborative Innovation Center for Automotive Components Technology

PID control and the velocity feedback control for ABS are studied of the wheel slip rate as controlled *** on these two kinds of control methods is *** is obtained that velocity feedback control and PID control exist much similarity in some extent,according to the hardware in the loop(HIL) simulation ***,the velocity feedback control has more obvious advantages than PID control in terms of the adaptability to different road *** can maintain stable control of system dynamically under the changed road condition,leading to the braking distance shorter.

关键词： PID control Automotive ABS

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