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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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Trajectory Tracking for Cable-driven Underactuated Manipulator Based on Udwadia-Kalaba Theory 3

Trajectory Tracking for Cable-driven Underactuated Manipulat...

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3rd IEEE International Conference on Electronic technology, Communication and Information, ICETCI 2023

作者： Hu, Sanbao Jin, Xiangsui Zhu, Hengjia Wuhan University of Technology Hubei Key Laboratory of Advanced Technology of Automotive Components Wuhan430070 China Civil Aviation University of China College of Aeronautical Engineering Tianjin300300 China

ISBN: (纸本)9798350398410

The explicit dynamic model of the cable-driven underactuated manipulator is established to calculate the constraint force by second-order constraints using the Udwadia-Kalaba theory and taking into account the trajectory tracking requirements of the cable-driven underactuated manipulator as the external constraints. Following the decomposition of the constraint force, the analytical expression for the cable tension is obtained. Furthermore, the numerical simulation in MATLAB shows that, when affected by the previously calculated cable tension, the manipulator's tracking trajectory may precisely match the requirements. This approach lessens modeling complexity without the Lagrangian multiplier compared to conventional Lagrangian modeling techniques. © 2023 IEEE.

关键词： Manipulators

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Analysis of friction moments of rolling bearings based on nonlinear dynamic model 23

Analysis of friction moments of rolling bearings based on no...

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8th International Conference on Intelligent Information Processing, ICIIP 2023

作者： Jiang, Yi Liu, Qing Deng, Song The Research Center of Cultural and Tourism Industries of Wuhan Business University Wuhan China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China

ISBN: (纸本)9798400708091

Accurately empirical formulas for friction moments of the bearing system at high speeds are firstly determined based on various inducing factors, whose precise calculation closely depends on a reliable nonlinear dynamic model of the bearing system at high speeds. For this, considering the time-varying traction forces, asperity friction coefficient and lubricant modes to develop a nonlinear dynamic model of the bearing system at high speeds. Then the significant friction moments are revealed and their inducing factors are investigated. Research results show a theoretical basis is essential for the structural design of the bearing system at high speeds. © 2023 Copyright held by the owner/author(s). Publication rights licensed to ACM.

关键词： Structural design

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A Deep Learning Capacity Estimation Method Based on Incremental Capacity Analysis and Differential Thermal Voltammetry 5

A Deep Learning Capacity Estimation Method Based on Incremen...

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5th International Conference on Artificial Intelligence Technologies and Applications, ICAITA 2023

作者： Zeng, Sibo Chen, Sheng Yu, Yang Hubei Key Laboratory of Advanced Technology for Automotive Components School of Automotive Engineering Wuhan University of Technology Wuhan China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan China School of Computing Engineering and Built Environment Glasgow Caledonian University Glasgow United Kingdom

ISBN: (纸本)9781643684840

Precise estimation of Lithium-ion battery capacity is critical for the battery management system (BMS). This paper proposed an innovative method that combinates convolutional neural network and feature curves which are incremental capacity analysis (ICA) and differential thermal voltammetry (DTV). Rather than extracting feature parameters of the IC curve as done in available research, the present method uses the whole IC and DTV curves in a certain range of voltage as the input to avoid complicated annual feature extraction and correlation analysis. The result shows that the max error of capacity estimation is less than 4.46 %, the mean absolute percentage error is less than 1.29 % for each battery, and overall MAPE is below 1.19 %. © 2024 The Authors.

关键词： Lithium-ion batteries

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Research on vehicle A-pillar visualization based on A-pillar detection and decision tree model 4

Research on vehicle A-pillar visualization based on A-pillar...

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2024 4th International Conference on Artificial Intelligence and Industrial technology Applications, AIITA 2024

作者： Yuan, Huan Sun, Jiaqi Zhang, Xiaoya Zhu, Yao Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China School of Textile Science and Engineering Wuhan Textile University Wuhan430070 China

When turning or passing through intersections, the vehicle's A-pillar blind spot may obscure road conditions. Using cameras to capture and display external images on the A-pillar screen can eliminate the A-pillar blind spot. However, this solution still faces a mismatch between the displayed screen image and the surrounding environment image. To obtain more accurate blind spot images, accurate blind spot cropping areas are calculated through vehicle A-pillar detection and image registration technology. By introducing eye position and posture as features and considering the corresponding blind spot cropping areas as target variables, a decision tree model is trained to predict the blind spot cropping areas. This model can rapidly and accurately predict the blind spot areas for display on the A-pillar screen, with an average pixel error of 12.7, a coefficient of determination of 0.85, and an image processing speed within one millisecond. Experiments show that the A-pillar blind spot visualization system based on A-pillar detection and decision tree model prediction effectively eliminates the A-pillar blind spot, enhancing driving safety. © Published under licence by IOP Publishing Ltd.

关键词： Image registration

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Detection method for surface scratches of composite automotive components with high reflection and complicated background color 6

Detection method for surface scratches of composite automoti...

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6th International Conference on Mechanical, Aeronautical and Automotive Engineering, ICMAA 2022

作者： Peng, Yanlong Tian, Dazhuang Ma, Binxuan Tian, Linli School of International Education Wuhan University of Technology Wuhan China School of Mechanical and Electronic Engineering Wuhan University of Technology Wuhan China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan China

Current testing status have the problems that the surface background color pattern of high reflective carbon fiber auto parts is complex, the shape of scratch defects is irregular, and the shallow and micro scratches are not easy to be detected. Aiming at the problems, a scratch detection method combining innovative morphological processing and optimized Canny edge detection algorithm is proposed. The image acquired by an innovative image acquisition platform. After gray processing and open operation denoising, the self-defined oval kernel secondary expansion is introduced in the morphological processing part. When threshold segmentation and minimum connected domain screening are done, the optimized Canny edge detection algorithm is used. Through the non-maximum suppression of gradient amplitude, a wide range of dual-threshold parameters are selected to detect the edge of the target image. The results show that the detection rate of the proposed method is 18.57% higher than that of the traditional way, and the detection rate is up to 95.71%. At the same time, the proposed method can reflect the scratch morphology more intuitively. © Published under licence by IOP Publishing Ltd.

关键词： Image acquisition

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Characteristics and formation mechanisms of defect bands in vacuum-assisted high-pressure die casting AE44 alloy

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Transactions of Nonferrous Metals Society of China 2022年第6期32卷 1852-1865页

作者： Ying-ying HOU Meng-wu WU Bing-hui TIAN Xiao-bo LI Shou-mei XIONG Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China

The microstructure in vacuum-assisted high-pressure die casting(HPDC) Mg-4Al-4RE(AE44) alloy was studied. Special attention was paid to the characteristics of defect bands and their formation mechanisms. Since double defect bands are commonly observed, the cross section of die cast samples is divided into five parts with different grain morphologies and size distributions. The inner defect band is much wider than the outer one. Both the defect bands are solute segregation bands, resulting in a higher area fraction of Al;RE;phase than that in the adjacent regions. No obvious aggregation of porosities is observed in the defect bands of AE44 alloy. This may be due to a narrow solidification temperature range of AE44 alloy and a large amount of latent heat released during the precipitation of intermetallic phases. The formation of the defect bands is related to the shear stress acting upon the partially solidified alloy, which can lead to collapse of the grain network. However, the generation mechanisms of shear stress in the outer and inner defect bands are quite different.

关键词： high-pressure die casting magnesium alloy AE44 microstructure defect band

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Lightweight design of absorber spring plate based on topological optimization method

Lightweight design of absorber spring plate based on topolog...

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2nd International Conference on Precision Mechanical Instruments and Measurement technology, ICPMIMT 2014

作者： Zhang, Jie Sun, Na Zhang, Ping Hu, San Bao Techanical Center of Wangxiang Group Hangzhou China Hangzhou Safety science and Technology Co. Ltd Hangzhou China Hubei Key Laboratory of Advanced Technology of Automobile Parts Wuhan University of Technology Wuhan China

ISBN: (纸本)9783038351948

HyperMesh was used to mesh the absorber spring plate, and MATLAB was used to read-in grid node coordinate file and to carry on multi-target structure topological optimization design through the self-compiled program. Objective functions include rigidity, volume and fatigue life etc. model reconstitution, CAE analysis and experimental verification were completed according to the optimization result. Results showed that optimized spring plate met the using need and lightweight design was accomplished. © (2014) Trans Tech Publications, Switzerland.

关键词： Topology

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Effect of Milling Parameter on the Surface State of Ultra-high strength Steel 16Co14Ni10Cr2Mo 6

Effect of Milling Parameter on the Surface State of Ultra-hi...

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2020 6th International Conference on Materials, Mechanical Engineering and Automation technology, MMEAT 2020

作者： Xu, Jin Yan, Fuwu Li, Yan Yang, Zhenchao Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology No. 122 Loushi Road Wuhan Hubei430070 China Xi'An University of Technology No.5 South Jinhua Road Xi'an Shaanxi710048 China

The machining mechanism and process parameters of ultra-high strength steel 16Co14Ni10Cr2Mo are still lack of complete understanding. By changing the milling condition, the influence of process parameters on cutting force, such as Radial milling depth, Axial milling depth, Feed per tooth and milling speed, is studied,and in the meanwhile that the surface morphology and hardness of 16Co14Ni10Cr2Mo after machining are analyzed. Indicating that the milling force increases with the increase of axial milling depth, feed rate and radial milling depth. With the increase of milling speed, the milling force reduces. The effect of axial cutting depth and radial cutting depth on cutting force is maximum. For 16Co14Ni10Cr2Mo ultra-high strength steel, it is suitable to use small cutting depth and high milling speed. On the surface of milling material, partial melting and partial oxidation of chips occur. When the milling speed and feed rate increased, the surface hardness of the material did not change significantly, and there was no work hardening. © Published under licence by IOP Publishing Ltd.

关键词： Strain hardening

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