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Proceedings of the 2022 6th International Conference on Electronic Information technology and Computer Engineering

作者： Xin Yang Houyu Yu Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology 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.

关键词： threshold segmentation lane line detection dynamic ROI inverse perspective transform RANSAC

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Study on the Relationship Between External Characteristic Parameters and Aging Mechanism of Lithium-Ion Batteries Based on an Electrochemical Model 10th

Study on the Relationship Between External Characteristic Pa...

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10th Frontier Academic Forum of Electrical Engineering, FAFEE 2022

作者： Kang, Jianqiang Zhou, Longlong Liu, Yuxi Gui, Yupeng Wang, Jing V. Zhu, Guorong Hubei Research Center for New Energy and Intelligent Connected Vehicle Wuhan University of Technology Wuhan430070 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China School of Automation Wuhan University of Technology Wuhan430070 China Flextech Company Hubei Wuhan430070 China

ISBN: (纸本)9789819934034

The purpose of this paper is to investigate the relationship between the external characteristic parameters of lithium-ion battery and the aging mechanism. An electrochemical model of SEI side reaction battery aging is established. The incremental capacity (IC) analysis is then adopted to analyze the discharge data after aging. The results show that, as the cycle progresses, SEI side reactions continue to consume active lithium ions, resulting in reduced battery capacity. At the same time, the internal resistance of the battery increases, and the IC curve moves in the direction of voltage reduction, and the peak ➀ of the IC curve decreases. The Pearson correlation coefficient between the characteristic parameters of peak ➀ and the State of Health (SOH) of the battery can be calculated. The correlations between the peak, the peak area and the SOH are as high as 0.9998. And since the change of peak ➀ of the IC curve is only related to the loss of active lithium ion. Therefore, by calculating the Pearson correlation coefficient of peak value, peak area and SOH of peak ➀,it can be proved that the loss of active lithium ion occurs in lithium batteries when the correlation degree is large enough. © Beijing Paike Culture Commu. Co., Ltd. 2023.

关键词： Lithium-ion batteries

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Structural modelling of rotary three-dimensional braiding preforms 6

Structural modelling of rotary three-dimensional braiding pr...

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6th International Conference on Computer Information Science and Application technology, CISAT 2023

作者： Wang, Hui Long, Wanxin Wang, Jinhuo Chen, Yizhe Yang, Liu Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Longzhong Laboratory Xiangyang441000 China Fujian Key Laboratory of Functional Materials and Applications Xiamen University of Technology Xiamen361024 China Jiangsu Xinyang New Material Co. Ltd. Yangzhou225000 China Guangrui Group Xiangyang441000 China

ISBN: (纸本)9781510668546

This work aims to study the modelling method of braiding preforms based on the rotary 3D braiding process. In the rotary 3D braiding process, the carrier is driven by the horn-gear through its alternating rotation, thus yarns interlacing to form the braiding preform. Encoding the horn-gear and the carrier to study the movement law of the carrier. The trajectory of the carrier and the height of the braiding node jointly determine the spatial topology structure of the braiding preform. The yarn trajectory is fitted and optimized using the cubic B-spline curve, Python script is written to drive CATIA to establish a solid model of the braiding preform and a fabric structure simulation interface is developed using PyQt5. Experiments on the braiding of irregular components are conducted to compare the actual braiding fabric with the corresponding model. The result indicates that the braiding algorithm could accurately record the coordinates of the trajectory points of the carrier;The fitted yarn trajectory conforms to the actual trajectory of the yarn;The simulated preform structure is consistent with the actual braiding preform. Therefore, it can be concluded that the modelling method is suitable for structural simulation of various cross-section braiding preforms. © 2023 SPIE.

关键词： Yarn

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Influences of Thickness Ratio of Base Sheets on Formability of Tailor Welded Blanks

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Procedia Engineering 2014年 81卷 730-735页

作者： Yanli Song Lin Hua Hubei Key Laboratory of Advanced Technology of Automobile Parts Wuhan University of Technology Wuhan Hubei 430070 China School of Material Science and Engineering Wuhuan University of Technology Wuhan Hubei 430070 China

The influences of thickness ratio of base sheets on formability of tailor welded blanks were examined based on Erichsen cupping tests. Three-dimensional finite element (FE) models, using Hill’48 yield criterion and iso-hardening rule, were built under the environment of the FE analysis software ABAQUS. The failure onset sites of tailor welded blanks were analysed and the quantitative relationships between the Erichsen index values and base thickness ratio were established. Based on these relationships, the formability of tailor welded blanks made from dissimilar base sheets are evaluated, provided that the Erichsen index values of tailor welded blanks made from identical ones are known and that the above two different types of tailor welded blanks undergo a similar stamping process. The experiments were then carried out to validate this method.

关键词： Thickness ratio Tailor welded blank Formability Erichsen index

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Adsorption-desorption cycle thermodynamics for adsorptive hydrogen storage system 20

Adsorption-desorption cycle thermodynamics for adsorptive hy...

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20th World Hydrogen Energy Conference, WHEC 2014

作者： Xiao, Jinsheng Bénard, Pierre Chahine, Richard Hydrogen Research Institute Université Du Québec à Trois-Rivières QCG9A5H7 Canada Hubei Key Laboratory of Advanced Technology for Automotive Components School of Automotive Engineering Wuhan University of Technology Hubei430070 China

The thermodynamic characteristics, such as temperature and pressure evolutions, of hydrogen storage systems are important to evaluate and optimize their performance. The thermodynamic models of hydrogen storage systems based on mass and energy balance equations can be expressed simply as lumped parameter or zero-dimensional models. Based on the authors' previous work on the charge-discharge cycle thermodynamics for gaseous hydrogen storage system, this article deals with an adsorption-desorption cycle thermodynamics for adsorptive hydrogen storage system, in which the reservoir is packed with porous adsorptive particles. For simplicity, the hydrogen adsorption amount is assumed proportional with the amount of gaseous hydrogen. Thus, the temperature and the pressure can be solved analytically and therefore can be used for validating the numerical models, e.g. Matlab/Simulink model, theoretically. The thermodynamic models described in this article are useful for developing more detailed multi-dimensional models or more general system level models. The examples given in this article may be served as benchmarks for system level simulations or computational fluid dynamics (CFD) simulations. © (2014) by the Committee of WHEC2014.

关键词： Desorption

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Performance analysis of the bump beams made of High Strength Steel and Carbon Fiber reinforce plastics

Performance analysis of the bump beams made of High Strength...

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2018 International Conference on Metal Material Processes and Manufacturing, ICMMPM 2018

作者： Yao, Yi Yuan, Quan Fu, Sihuan Pan Asia Technical Automotive Center Co. Ltd. Shanghai201206 China School of Automotive Engineering WuhanUniversity of Technology Wuhan430070 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan430070 China SAIC GM Wuling Automobile Co. Ltd Liuzhou545007 China

Lightweight and safe are the key research directions of the automobile industry. Bump beam is an important part of the car safety protection and it's lightweight design has drawn much attention. In this paper, the static strength and the low-speed impact performances of two types of bump beam with the same structure, which made of carbon fiber reinforced plastics (CFRP) and high strength steel (HSS), were investigated. Under the condition of static press, frontal and 40% offset impact, part structural stiffness, component crush intrusion, energy absorption were comparison analyzed. In order to guide the product design, the deformation and failure of CFRP beams with five different laminate structures were simulated under frontal and 40% offset impact. The results indicate that, with the same structure, the properties of CFRP bump beam are generally superior to HSS product, more conducive to lightweight and the optimum design of the laminate is [0 deg;/ 60 deg;/ 120 deg;] . © 2018 The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0.

关键词： High strength steel

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MXene key Composites:A New Arena for Gas Sensors

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Nano-Micro Letters 2024年第10期16卷 350-391页

作者： Yitong Wang Yuhua Wang Min Jian Qinting Jiang Xifei Li Hubei Province Key Laboratory of Systems Science in Metallurgical Process Wuhan University of Science and TechnologyWuhan 430081People's Republic of China Key Materials and Components of Electrical Vehicles for Overseas Expertise Introduction Center for Discipline Innovation Institute of Advanced Electrochemical Energy and School of Materials Science and EngineeringXi'an University of TechnologyXi'an 710048People's Republic of China College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108FujianPeople's Republic of China

With the development of science and technology,the scale of industrial production continues to grow,and the types and quantities of gas raw materials used in industrial production and produced during the production process are also constantly *** gases include flammable and explosive gases,and even contain toxic ***,it is very important and necessary for gas sensors to detect and monitor these gases quickly and *** recent years,a new two-dimensional material called MXene has attracted widespread attention in various *** abundant surface functional groups and sites,excellent current conductivity,tunable surface chemistry,and outstanding stability make them promising for gas sensor *** the birth of MXene materials,researchers have utilized the efficient and convenient solution etching preparation,high flexibility,and easily functionalize MXene with other materials to pre-pare composites for gas *** has opened a new chapter in high-performance gas sensing materials and provided a new approach for advanced sensor ***,previous reviews on MXene-based composite materials in gas sensing only focused on the performance of gas sensing,without systematically explaining the gas sensing mechanisms generated by different gases,as well as summarizing and predicting the advantages and disadvantages of MXene-based composite *** article reviews the latest progress in the application of MXene-based composite materials in gas ***,a brief summary was given of the commonly used methods for preparing gas sens-ing device structures,followed by an introduction to the key attributes of MXene related to gas sensing *** article focuses on the performance of MXene-based composite materials used for gas sensing,such as MXene/graphene,MXene/Metal oxide,MXene/Transition metal sulfides(TMDs),MXene/Metal-organic framework(MOF),MXene/*** summarizes the advantages and disad

关键词： MXene Compound material Gas sensor Gas sensitive preparation Gas sensitivity performance

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Background Filtering and Object Detection with Roadside LiDAR Data

Background Filtering and Object Detection with Roadside LiDA...

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Electron Device and Mechanical Engineering (ICEDME), International Conference on

作者： Zihan Liu Qizhong Li Shengming Mei Miaohua Huang Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan China

The roadside LiDAR(light detection and ranging) sensors can obtain relevant information about all roadway users by collecting real-time 3D point cloud data of surrounding objects. In order to analyze the point cloud data of roadway users, background filtering and object detection are essential steps. This paper proposes a background filtering method based on point correlation by KDTree neighborhood searching and an adaptive threshold Euclidean clustering method. In order to improve the detection speed, background filtering will be performed on the original point cloud data before Euclidean clustering, so as to delete a large number of useless background points, and the clustering results will be distinguished by cuboid frame markers. The experimental results show that the single-frame point cloud clustering speed has increased by 31.3%, the clustering speed has been significantly improved.

关键词： Three-dimensional displays Laser radar Correlation Filtering Object detection Real-time systems Distance measurement

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Intelligent Vehicle Trajectory Tracking Control Based on $H_{\infty}$ Proportional-differential Controller

Intelligent Vehicle Trajectory Tracking Control Based on $H_...

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Industrial Cyber-Physical Systems (ICPS)

作者： Gongwei Pan Zhiyong Feng Huiru Guo Hubei Key Laboratory of Advanced Technology of Automotive Components Wuhan University of Technology Wuhan China

In order to improve the trajectory tracking accuracy and stability of intelligent vehicles, this paper proposes a vehicle trajectory tracking control method based on $\boldsymbol{H_{\infty}}$ proportional-differential (PD) control. Taking the two-degree-of-freedom vehicle model considering lateral motion and yaw motion as the research object, we establish the state space model based on tracking error. Then, the PD control problem of the model is transformed into a static output feedback (SOF) control problem, and the coordinate transformation matrix (CTM) method is used to solve the problem by multiple iterative optimizations. Finally, the $\boldsymbol{H_{\infty}}$ PD controller satisfying pole configuration constraints and $\boldsymbol{H_{\infty}}$ performance constraints is obtained. The co-simulation of MATLAB/Simulink and Carsim shows that the controller has high tracking accuracy based on ensuring vehicle stability in both the double lane-change condition and the serpentine condition.

关键词： Space vehicles Trajectory tracking Intelligent vehicles Roads Wheels Process control Stability analysis

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Quadruped Robot Motion Control Method Based on Adaptive Weight Coefficients MPC

Quadruped Robot Motion Control Method Based on Adaptive Weig...

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advanced Algorithms and Control Engineering (ICAACE), International Conference on

作者： Zhipeng Nan Lin Xu Chengleng Han Guorui Zhao Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan China

ISBN: (数字)9798350361445

ISBN: (纸本)9798350361452

In real-world environments, quadruped robots often need to traverse unstructured terrains and may encounter various unexpected impacts. To enhance the motion balance performance of quadruped robots when facing unknown disturbances in such environments, we propose a fuzzy adaptive weight controller based on Model Predictive Control (MPC). By conducting an in-depth analysis of the impact of weight coefficients in the MPC's objective function on control effectiveness, we have designed an adaptive fuzzy algorithm. This algorithm dynamically adjusts the weight coefficients according to the current errors in the robot's roll and pitch angles, as well as their rates of change. Subsequently, the MPC controller calculates the optimal control torques using these adjusted weight coefficients. To validate the effectiveness of this strategy, we conducted simulations of lateral impacts and walking on unstructured terrains in Gazebo. The simulation results demonstrate that, under various test conditions, the proposed adaptive weight MPC controller significantly improves the robot's motion stability, showcasing its strong capability to handle unknown disturbances.

关键词： Robot motion Adaptation models Heuristic algorithms Prediction algorithms Aerodynamics Linear programming Stability analysis

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