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Differences between traditional cold forging and cold orbital forging of a spur bevel gear

Procedia Engineering 2017年 207卷 442-447页

作者： Wuhao Zhuang Xinghui Han Lin Hua School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China Hubei Key Laboratory of Advanced Technology of Automotive Components Wuhan University of Technology Wuhan 430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan 430070 China

Cold orbital forging, as an advanced incremental forming process, has been widely researched and used to fabricate the spur bevel gear. However, the mechanism of cold orbital forging is quite different from that of traditional cold forging, which leads to the different forming laws and different properties of forged gear. In this paper, cold orbital forging and traditional cold forging of a spur bevel gear are simulated under the same conditions in the Deform-3D software platform. The filling process, geometric characteristics of forged gear, effective stress distribution, effective strain distribution, gear tooth accuracy are comprehensively clarified and compared. The results show that, comparing with traditional cold forging of a spur bevel gear, cold orbital forging can increase the degree and homogeneity of plastic deformation and improve the gear tooth accuracy.

关键词： Cold orbital forging Traditional cold forging FE simulation Spur bevel gear

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Numerical analysis of loaded stress and central displacement of deep groove ball bearing

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Journal of Central South University 2016年第10期23卷 2542-2549页

作者：杨磊邓松李红星 Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan 430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan 430070 China Zhejiang Tianma Bearing Co. Ltd. Hangzhou 310015 China

The aim of this work is to develop a three-dimensional model of deep groove ball bearing to investigate the loaded stresses and central displacements of bearing rings. The equivalent stresses and central displacements of bearing rings are obtained based on the simulated analysis. Moreover, several parameters, such as load magnitude, raceway groove curvature radius(RGCR), thicknesses of outer and inner rings, are varied to investigate their effects on the equivalent stresses and central displacements of bearing rings. Research results provide useful guidelines for determining the design parameters.

关键词： deep groove ball bearing equivalent stress central displacement

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Modal analysis and optimization of bus body structure

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Journal of Physics: Conference Series 2018年第1期1074卷

作者： Song Deng Xinghui Han Lei Yang Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan 430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan 430070 China

To study the vibration and noise of the bus, the structural and the relevant acoustic models of the bus body are firstly established. Then, their resonant frequencies and crucial modes of vibration are analyzed. The stiffness, mass and natural frequency of the studied beams are varied to optimize the vibration frequencies and modes of the bus body. The results provide valuable guidelines for the modal analysis and optimization of the bus body structures.

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Research on the Choice Strategy of Electric Vehicle Charging Users

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IOP Conference Series: Materials Science and Engineering 2018年第1期366卷

作者： Y Zhu D Zhou Z Den S J Chen X You Hubei Key Laboratory of Advanced Technology for Automotive Components Automobile Engineering Institute Wuhan University of Technology 205 Luoshi Road Hongshan District Wuhan 430070 China. School of Automation Wuhan University of Technology Wuhan 430070 China

Starting from the perspective of electric vehicle users, this paper analyzes the service needs of different users for charging electric vehicles and considers various objective conditions of electric vehicles: the remaining electric vehicles, the driving distance from the charging pile / station, the charging of electric vehicles Charging time, the location of the charging equipment, etc., gives several user selection strategies that minimize the energy loss of electric vehicles, minimize the time spent by electric vehicle users, and optimize the comprehensive cost of users. Through the theoretical analysis and experimental simulation results, the advantages and disadvantages of several user selection strategies are compared to provide users with a good charging service for electric vehicles, and at the same time, the optimal choice of charging options for users is realized, The service quality of the car is conducive to the promotion and sustainable development of electric vehicles and charging equipment.

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Investigation of a novel modified die design for fine-blanking process to reduce the die-roll size

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Procedia Engineering 2017年 207卷 1546-1551页

作者： Bo Tang Yanxiong Liu Huajie Mao School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan 430070 China Hubei Key Laboratory of Advanced Technology of Automotive Parts Wuhan University of Technology Wuhan 430070 China

Fine-blanking is known as an effective sheet metal forming process to obtain precisely blanked parts with smooth cutting surface. However, the die-roll occurred in the sharp area is an inevitable problem which decreases the working performance and service life of the part. In order to reduce the die-roll size, a modified die design for fine-blanking process was proposed. The cutting edge of the die is set on an indenter arranged along the sharp area, while in the conventional die design, cutting edge is set on the die directly according to the part outline. The finite element method was used to optimize the die structure. The material flow was studied to explain the mechanism of the modified die design compared to the conventional die. The results of the FE-simulation were applied in the production of the automobile synchronizer. This part has four sharp areas where big die-roll occurs easily and yet it requires small die-roll sizes strictly. The experiment results proved that this novel die design was quite effective to reduce the die-roll size, which showed a promising application in future real practice.

关键词： fine-blanking die-roll size finite element method

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Design and simulation of a foldable hexagon array solar panel for electric vehicles 31

Design and simulation of a foldable hexagon array solar pane...

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31st Youth Academic Annual Conference of Chinese Association of Automation, YAC 2016

作者： Huang, Yuhang Wei, Xiaoxu Liu, Chong hubei, Anqi Zheng Key Laboratory of Advanced Technology for Automotive Components Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan China

ISBN: (纸本)9781509044238

Hexagonal array solar cell as the energy of the solar car, and further analyzes it. This article describes the working principle of the solar cells. Establishing the simulation model for the solar mathematical module, and get the same solar cells output characteristic curves in any number of series and parallel at different temperatures and different light intensity based on MATLAB/SIMULINK. Meanwhile designing an array solar panel consisted of various kinds of different parameters solar cells. By analyzing the output characteristics of the actual solar cells module, verify the feasibility and the importance of the simulation module. © 2016 IEEE.

关键词： Solar panels

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Final Hydrogen Mass Determined from Refueling Parameters

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Energy Procedia 2017年 105卷 1370-1375页

作者： Xu Wang Jinsheng Xiao Pierre Bénard Richard Chahine Hubei Key Laboratory of Advanced Technology for Automotive Components and Hubei Collaborative Innovation Center for Automotive Component Technology School of Automotive Engineering Wuhan University of Technology Hubei 430070 China Hydrogen Research Institute Université du Québec à Trois-Rivières QC G9A 5H7 Canada

The final hydrogen mass in the tank at the end of the filling process of a compressed hydrogen storage system is a key indicator to show whether the tank has met the requirement of high final state of charge (SOC). In order to improve the SOC, the influencing factors on the final hydrogen mass and contribution of the influencing factors to the final hydrogen mass need to be investigated. To address this issue, a lumped parameter model has been developed and a thermodynamical analysis has been presented, thus we can obtain an analytical solution of the final hydrogen temperature. By rearranging the analytical solution, the function relationship between the final hydrogen mass and the refueling parameters can be obtained. In this article, we express the final hydrogen mass as the function of the mass filling rate, initial pressure and inlet temperature. For the three cases, the effects of mass filling rate, initial pressure and inlet temperature on the final mass are also shown, further the deduced equations are used to fit the reference data, the fittings show good agreement. With the fitted parameters, a new formula can be proposed to express the function relationship between final mass and the three parameters. We believe this study contributes to providing invaluable guidance in developing advanced refueling standard.

关键词： Hydrogen storage Refueling Fast filling Final mass State of charge Safety

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Estimation of Final Hydrogen Temperatures During Refueling 35 MPa and 70 MPa Tanks

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Energy Procedia 2017年 105卷 1363-1369页

作者： Ji Cheng Jinsheng Xiao Pierre Bénard Richard Chahine Hubei Key Laboratory of Advanced Technology for Automotive Components and Hubei Collaborative Innovation Center for Automotive Component Technology School of Automotive Engineering Wuhan University of Technology Hubei 430070 China Hydrogen Research Institute Université du Québec à Trois-Rivières QC G9A 5H7 Canada

Based on the analytical solution of a lumped parameter model for fast filling of hydrogen storage tank, the final hydrogen temperature under final pressures of 35 MPa and 70 MPa are both fitted very well with the reference data through curve and surface fittings. The results show effects of ambient temperature, initial pressure and filling rate on the final hydrogen temperature. Reducing the rate of hydrogen filling, reducing the ambient temperature or increasing the initial pressure can effectively reduce the final hydrogen temperature in the tank. We suppose this study not only helps to know the relationship between the final hydrogen temperature and refueling condition, but also lets us learn how to control refueling processes.

关键词： Hydrogen storage Safety Refueling Fast filling Thermodynamics Heat transfer

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Simulation Study on Vehicle Road Performance with Hydraulic Electromagnetic Energy-Regenerative Shock Absorber

Simulation Study on Vehicle Road Performance with Hydraulic ...

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SAE 2016 World Congress and Exhibition

作者： Peng, Ming Guo, Xuexun Zou, Junyi Zhang, Chengcai Wuhan University of Technology School of Automotive Engineering Hubei Key Laboratory of Advanced Technology for Automotive Components Hubei Collaborative Innovation Centre for Automotive Components Technology Wuhan430010 China

This paper presents a novel application of hydraulic electromagnetic energy-regenerative shock absorber (HESA) into commercial vehicle suspension system and vehicle road performance are simulated by the evaluating indexes (e.g. root-mean-square values of vertical acceleration of sprung mass, dynamic tire-ground contact force, suspension deflection and harvested power;maximum values of pitch angle and roll angle). Firstly, the configuration and working principle of HESA are introduced. Then, the damping characteristics of HESA and the seven-degrees-of-freedom vehicle dynamics were modeled respectively before deriving the dynamic characteristics of a vehicle equipped with HESA. The control current is fixed at 7A to match the similar damping effect of traditional damper on the basis of energy conversion method of nonlinear shock absorber. Compared with the vehicle equipped with conventional shock absorber under the same excitation conditions of random road and vehicle speed, vehicle dynamics response and energy-regenerative potential of HESA suspension system are analyzed. Judging with the first three main evaluating indexes, the numerical differences between HESA equipped vehicle and conventional one in the vertical acceleration of sprung mass is within 9.2%, the dynamic tire-ground contact force is within 2.2%, and the suspension deflection is within 6.1%. The handling stability of fixed current control and failure mode of HESA is comparatively analyzed. Moreover, when offering reliable damping force for vehicle suspension system, HESA could regenerate power from 41.72 to 339.88 W (RMS) with vehicle speed ranging from 30 to 70 km/h on Class B and Class C random road. © Copyright 2016 SAE International.

关键词： Roads and streets

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Optimal braking control for an independent four wheel-motor-driven electric vehicle 6

Optimal braking control for an independent four wheel-motor-...

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6th Hybrid and Electric Vehicles Conference, HEVC 2016

作者： Yu, Houyu Wood, Alastair Strang Huang, Miaohua Qi, Hongsheng Hubei Key Laboratory of Advanced Technology for Automotive Components Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan China School of Engineering University of Bradford Bradford United Kingdom School of Automotive Engineering Wuhan University of Technology Wuhan China

ISBN: (纸本)9781785612947

The lightweight, integrated, and high performance motor-wheel driven electric vehicle is clean, energy saving, and safe, and has the potential to form the ideal electric vehicle for the future. This paper proposes an optimal fuzzy neural network braking control strategy to determine the allocation of the front and rear regenerative braking torque and friction braking torque for the independent four Wheel-Motor-Driven (4WMD) electric vehicle. The proposed fuzzy neural network controller applies a five-layered neural network to map relations between the inputs (required total braking torque and battery State Of Charge (SOC)) and the outputs (front and rear in-wheel-motor regenerative braking torques), and uses a genetic algorithm to optimize offline the weights and thresholds of this fuzzy neural network to determine the dynamic allocation of the front and rear in-wheel-motor regenerative braking torque and friction braking torque. The objective is to maximize the battery SOC at the end of braking, and the constraints are the required braking speed of the vehicle, the limited regenerative braking torque of an in-wheel-motor, and the allowable SOC range of the battery. A lightweight independent 4WMD electric vehicle model (including vehicle longitudinal dynamic model, tyres, in-wheel motors, batteries and disc brakes) and this fuzzy neural network braking control model are built in the Matlab/Simulink environment, and are simulated and validated under different braking scenarios. The simulation results illustrate that this optimal braking control is better than the simple rule-based braking control, recovering more regenerative braking energy while meeting the vehicle braking performance requirements. © 2016, Institution of Engineering and technology. All rights reserved.

关键词： Fuzzy neural networks

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