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05 December 2024, Volume 49 Issue 23 Previous Issue   
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New Energy Vehicle
Intelligent Connected Vehicle
Design and Research
Testing and Experiment
Process·Materials
Automobile Education


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New Energy Vehicle

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Research on the Lateral Stability Control of Distributed Drive Electric Vehicle ZHAO Yuehe, LU Pengcheng, ZHANG Duanjun, MA Chao 2024, 49(23): 1-5.  DOI: 10.16638/j.cnki.1671-7988.2024.023.001 Abstract ( )   PDF (736KB) ( )   To improve the lateral stability of vehicle, a lateral stability control strategy of distributed drive electric vehicle based on differential drive is proposed in this paper. Firstly, with a distributed drive electric vehicle as the research object, vehicle dynamics model is established using Simulink, and the built model correctness is verified by comparing it with the CarSim vehicle; then, a fuzzy controller (upper level control) is designed with the vehicle lateral angular velocity deviation and the vehicle center of mass distortion angle deviation as inputs, and the additional lateral torque as output. Considering the limitation of tire adhesion and the utilization rate of tire adhesion, the driving torque distribution controller (lower level control) is designed; finally, select typical operating conditions for simulation experiments. The experimental results show that the design vehicle lateral stability strategy can reduce the deviation of vehicle lateral angular velocity by more than 40%, and reduce the deviation of vehicle center of mass distortion angle by more than 80%, thereby making the vehicle's steering motion tend towards neutral turning and effectively improving the vehicle's lateral stability. References | Related Articles | Metrics

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Research on Anti-collision for Rear-End in Elderly Pure Electric Passenger Vehicles CHEN Lijing 2024, 49(23): 6-10,15.  DOI: 10.16638/j.cnki.1671-7988.2024.023.002 Abstract ( )   PDF (790KB) ( )   In consideration of the extended reaction time of the elderly drivers and the relatively limited deceleration capability of elderly passenger cars, an anti-collision model of pure electric passenger vehicles for the elderly is developed by extending warning lead times, configuring warning, comfortable braking, and emergency braking scenarios. Through MATLAB simulation, it is observed that the stopping distance on wet roads exceeded that on dry surfaces, with the disparity growing alongside the trailing vehicle's speed; as the velocity differential between two vehicles increased, so do the variance in emergency braking distances on inclines, particularly evident on moist roads. When maintaining a constant speed differential, discrepancies in warning braking distances during curves became more pronounced as following car speeds escalated necessitating distinct curvewarning configurations. References | Related Articles | Metrics

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Research on Leaching Metal-ions from Spent LiFePO4 Battery Positive Electrode Materials Using Lactic Acid-Based Deep Eutectic Solvents YUAN Zhang1 , JIN Jianjiao*1 , WU Liangqin1 , ZHANG Chenyun3 2024, 49(23): 11-15.  DOI: 10.16638/j.cnki.1671-7988.2024.023.003 Abstract ( )   PDF (743KB) ( )   Deep eutectic solvents, as a new type of green solvent, have shown wide application prospects various fields such as chemistry, biology and material. This study focuses on the positive electrode material of spent lithium-iron phosphate batteries and investigated the leaching effect of metal ions using a deep eutectic solvent prepared with choline chloride (ChCl), lactic acid (LA), and H2O. The leaching effect Li and Fe in the positive electrode was explored by factors such as ChCl/LA molar ratio, solid-liquid ratio, leaching temperature and time. The research results show that under the optimal leaching conditions of ChCl/LA molar ratio of 1:3, solid-liquid ratio of 1:100, leaching temperature of 140 ℃, and leaching time of 8 h, the leaching rates of Li and Fe reached 92.98% and 94.57%, respectively References | Related Articles | Metrics

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Analysis of the Influence of Environmental Parameters on the Systems Performance of Fuel Cell CHEN Yi, ZHAO Qingyao, LI Qiang 2024, 49(23): 16-23,60.  DOI: 10.16638/j.cnki.1671-7988.2024.023.004 Abstract ( )   PDF (1931KB) ( )   With the rapid development of hydrogen energy industry and the breakthrough and maturity of fuel cell key technologies, hydrogen fuel cell with zero-emission characteristics is regarded as the best solution for new energy in the future. In order to improve the environmental adaptability of fuel cell systems, based on the fuel cell system model verified by the measured data, a study on the influence of environmental parameters such as environmental humidity, temperature and pressure on the system performance is carried out. The results show that low environmental humidity will lead to the increase of fuel cell internal resistance under high current density, which will reduce the system output power. At a current density of 2 A/cm 2 , the output power of the stack differs by about 8 kW between an environmental humidity of 20 %RH and 100 %RH; environmental temperature affects the stack inlet pressure, flow rate, and power consumption of the air compressor by changing the inlet density. At a current density of 1.6 A/cm 2 , the power consumption of the air compressor differs by 3.9 kW between environmental temperatures of -20℃ and 30 ℃. Low environmental temperature is conducive to improve of the system efficiency in the low current density period, while the high current density period reduces the efficiency of the system; the decrease in environmental pressure leads to a decrease in the inlet flow and pressure of the stack, which in turn leads to a decrease in stack voltage and output performance. It may even be unable to operate normally in high altitude and high power demand situations. The article provides reference data and theoretical basis for the actual application scenarios for the fuel cell engine to meet the increasingly strict requirements for the environmental adaptability of fuel cell engine. References | Related Articles | Metrics

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Introduction and Application of Vehicle Drag Torque Control Function GONG Wen 2024, 49(23): 24-27，31.  DOI: 10.16638/j.cnki.1671-7988.2024.023.005 Abstract ( )   PDF (1560KB) ( )   The vehicle traction control system (TCS) is to control the slip rate of the vehicle driving wheel in the process of vehicle acceleration, mainly through the engine or motor torque reduction and wheel end braking to control the driving wheel skid, in order to achieve the body stability. This paper introduces the working principle, system architecture, signal interaction requirements and practical application examples of another driving wheel slip rate control function (vehicle drag torque control). Unlike TCS function, the drag torque control (DTC) function is one of the value-added functions of electronic stability controller to realize vehicle stability control under low adhesion road surface and non-acceleration conditions. According to the application scenarios of DTC function, the actual performance of the vehicle when the DTC function is activated in braking and non-braking scenarios is illustrated. The results show that the vehicle with DTC function can avoid the front axle loss of steering caused by the lock of the driving wheel or the rear axle rejection during operation, which is conducive to improving the stability of the vehicle. Bring more superior driving safety experience to the driver. References | Related Articles | Metrics

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Vibration Analysis of Electric Vehicle Power Battery System Based on Finite Element Method KANG Tingting1 , LI Yantao2 , GAO Juan1 2024, 49(23): 28-31.  DOI: 10.16638/j.cnki.1671-7988.2024.023.006 Abstract ( )   PDF (797KB) ( )   Based on an electric vehicle battery pack development project, this paper uses finite element method to simulate and analyze the rationality of the battery pack design. Firstly, the key parameters of the battery pack are screened, and the finite element model of the battery pack is established. Then, by extracting the important modes of the battery pack, the battery pack mode simulation analysis is carried out to carry out random vibration and constant frequency vibration simulation, and the RMS stress value and Von Mises stress value of each key structural component are obtained. At the same time, a vibration test is carried out to verify the reliability of the battery system, and the rationality of the simulation method and the reliability of the battery pack structure design are demonstrated by comparing the simulation results with the vibration data, which can provide a reference for the subsequent battery pack design. References | Related Articles | Metrics

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Structural Design of Power Battery System and Optimization of Group Technology HE Ying1 , SHAN Baolong2 2024, 49(23): 32-36.  DOI: 10.16638/j.cnki.1671-7988.2024.023.007 Abstract ( )   PDF (1260KB) ( )   Power battery structure design and technical optimization strategy are important means to improve the performance, safety and life of electric vehicles. This paper analyzes and discusses the key components and structural characteristics of power batteries of new energy vehicles, battery material innovation, power battery module design and manufacturing process, thermal management and energy management strategies, etc., and proposes the structural design of power battery systems and group technology optimization schemes and development directions. This provides theoretical support and practical guidance for the development of new energy vehicle power batteries. References | Related Articles | Metrics

Intelligent Connected Vehicle

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Research on Electromagnetic Immunity Test Method of Intelligent Vehicle ADAS SHENG Kai1 , WAN Lei1 , CAI Weixin1 , WANG Wenxia1 , JIA Jin*1,2 2024, 49(23): 37-43.  DOI: 10.16638/j.cnki.1671-7988.2024.023.008 Abstract ( )   PDF (5783KB) ( )   To verify the reliability of advanced driving assistance system (ADAS) functions in complex electromagnetic environments and taking into account the current lack of ISO 11451-2 compliant test methods, this paper proposes an ADAS electromagnetic radiation immunity test platform and test method for ADAS electromagnetic immunity based on vehicle hardware-in-loop concept. And develops an ADAS electromagnetic radiation immunity test platform for electromag netic immunity test of vehicle ADAS function. Based on the principle of small-hole imaging and radar simulator, the calibration of camera and radar sensor and the verification of sensor scene fusion are completed, The vehicle's lane departure warning (LDW), adaptive cruise control (ACC) with multiple targets, and blind spot detection (BSD) and other conditions were successfully activated in the semi-anechoic chamber. ACC is successfully activated in the semi-anechoic chamber. Finally, electromagnetic radiation immunity test is carried out on ACC function. When the spot force reaches 98 V/m, the ACC function of the vehicle is withdrawn. The results show that the proposed test method and test platform are feasible and effective for the electromagnetic radiation immunity test of ADAS system. References | Related Articles | Metrics

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Research of Functional Safety Test Technology of Intelligent Driving Domain Controller CHEN Chaoying, SHEN Hongping, TONG Guowei, LUO Jianheng, WEI Shengyu, XU Huawei, ZHOU Xundao XU Huawei, ZHOU Xundao 2024, 49(23): 44-48.  DOI: 10.16638/j.cnki.1671-7988.2024.023.009 Abstract ( )   PDF (902KB) ( )   With the rapid development of intelligent connected vehicles, the autonomous driving system must have functional safety technology, but there are few researches on the testing technology of intelligent driving domain controller that meets the functional safety requirements. This paper takes the functional safety standard Road Vehicles Functional Safety (GB/T 34590) and (ISO 26262) as guidance, takes automatic lane keeping system as an example, chooses 2 functions to carry out hazard analysis and risk assessment, and establishes safety goals to avoid vehicle hazards. Then the functional safety requirements are derived from the safety goals and assigned to the intelligent driving domain controller. In order to verify whether the safety requirements are met, fault injection test cases are prepared, and hardware-in-the-loop test technology is adopted to simulate the faults of controller area network (CAN) bus signal E2E check error and invalid value signal error, so as to verify the effectiveness of the functional safety mechanism, and provide references for the functional safety development and test verification of intelligent driving domain controllers. References | Related Articles | Metrics

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Traffic Light Detection Method Based on YOLOv8 and Re-identification Using SVDD YU Yang, HE Liu 2024, 49(23): 49-54.  DOI: 10.16638/j.cnki.1671-7988.2024.023.010 Abstract ( )   PDF (1786KB) ( )   To improve the detection accuracy and recognition precision of traffic lights, this paper proposes an SVDD-YOLOv8 target detection method based on YOLOv8. This method enhances feature capture and reconfirms targets by integrating the global attention mechanism (GAM) and support vector data description (SVDD) classification module. Meanwhile, the embedding intersection over union (EIoU) loss function is introduced to improve positioning accuracy. The abnormal areas identified by SVDD are retrained to enhance the model's performance. Experiments show that this method improves detection accuracy and mAP@0.5 by 7.75% and 8.99%, respectively, compared to YOLOv8, demonstrating the effectiveness of this approach in improving traffic light detection accuracy and anti-interference ability. References | Related Articles | Metrics

Design and Research

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Optimization and Error Analysis of Vehicle Speed Calculation Method Using Road Shadows DING Xingbing, WANG Di, HUANG Lei, HE Zhonghua 2024, 49(23): 55-60.  DOI: 10.16638/j.cnki.1671-7988.2024.023.011 Abstract ( )   PDF (3266KB) ( )   In the field of vehicle speed identification in road traffic accidents, the shadow speed measurement method is an unconventional approach that calculates vehicle speed based on the moving distance of the shadow formed by vehicle characteristic points on the road surface and the corresponding time. The accuracy of this method is affected by factors such as the type and position of the light source, as well as environmental conditions. This paper studies the shadow speed measurement method, analyzes the impact of using shadows formed by natural and artificial light sources on the accuracy of speed calculations, and discusses the corresponding causes of errors. Through theoretical analysis and practical verification, specific strategies for reducing errors are creatively proposed, along with three novel and unique practical methods aimed at minimizing speed calculation errors and improving the accuracy of results. References | Related Articles | Metrics

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Research on Interpolation Calculation Method of Vehicle Driving Resistance Coefficient ZHANG Yuming, SHA Zhou 2024, 49(23): 61-65.  DOI: 10.16638/j.cnki.1671-7988.2024.023.012 Abstract ( )   PDF (992KB) ( )   The driving resistance coefficient is a key input for the simulation of automotive performance and economy, engine matching, and fuel consumption emission testing. It runs through the entire process of automotive development. In order to accurately obtain the driving resistance coefficient before the actual vehicle coasting test, this article analyzes the motion model of the vehicle during coasting motion, establishes the relationship between the driving resistance coefficient and the tyre rolling resistance, transmission system resistance and air resistance. Combined with the existing test data of mass production vehicle, a method is proposed to establish a driving resistance family based on the transmission type, interpolate and calculate the driving resistance coefficient of newly developed vehicle models, and meet the requirements of vehicle development for driving resistance coefficient before actual vehicle coasting. After mass production of the actual vehicle, coasting test is conducted in the testing field, and the test results verified the effectiveness of the method. References | Related Articles | Metrics

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Optimization and Verification of the Closure Door Sound Quality of a Off-road Vehicle ZHAO Yujian, TIAN Guohong 2024, 49(23): 66-70.  DOI: 10.16638/j.cnki.1671-7988.2024.023.013 Abstract ( )   PDF (2656KB) ( )   The closure door sound quality of off-road vehicle is distinct from that of other vehicle categories due to specialized functions. This paper initiates with the examination of off-road vehicle closure door sound quality, introduces two assessment methodologies. The subjective appraisal and objective testing is employed on an off-road vehicle. Wavelet diagrams are analyzed to pinpoint the problems raised in the evaluation, the rectification schemes of improving the sealing strip, adding butyl rubber film in the weak place of dynamic stiffness, and optimizing the design of the door lock are given and verified. After the test verification and comparison, it is found that the sound quality has been significantly improved, which provides reference and reference ideas for solving related problems in the future, and has certain value in engineering and commercial applications. References | Related Articles | Metrics

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A Scheme of Cost Reduction for a Cable Bracket of Trailer ZHOU Zhichao1 , CHEN Defa2 , HU Lei3 , WEI Zifeng1 , MA Baolong1 2024, 49(23): 71-74,96.  DOI: 10.16638/j.cnki.1671-7988.2024.023.014 Abstract ( )   PDF (3797KB) ( )   Through benchmarking analysis of the existing cable brackets of trailer in mainstream domestic heavy truck factories, the structure and production process of a cable bracket of our company are too complex compared with other heavy truck factories. Referring to the design ideas of the brackets from other factories, the structure of the existing cable brackets is optimized. Considering the existing production conditions of the bracket suppliers at the same time, the original materials and equipment are used to the greatest extent to simplify the production process, so as to achieve the target of weight reduction and cost reduction. The computer aided engineering (CAE) simulation is carried out on the optimized bracket to ensure that the new bracket meets the structural strength requirements. The installation and clearance between with other parts of the simplified bracket are verified to ensure that there is no impact on surrounding parts and no influence on the installation. After verification, the new scheme can achieve the target of weight and cost reduction, and meet the production and installation requirements actually after verification. References | Related Articles | Metrics

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The Application of Domestic Microcontroller on Gesture Recognition of Automotive Sunroof GENG Zhan1 , JIANG Hao*2 , FANG Boyi3 , DING Pengfei3 , MA Yanshu3 2024, 49(23): 75-78.  DOI: 10.16638/j.cnki.1671-7988.2024.023.015 Abstract ( )   PDF (1588KB) ( )   Compared with the traditional button control, controlling the opening and closing of the electric sunroof and electric sunshade through gestures can enhance the interactive performance of car driving and improve the safety of car driving. Therefore, the scheme of using reflective infrared optical coupling sensing and microcontroller is proposed, design and make the corresponding electric skylight and shade gesture recognition module. The module using BF7112A microcontroller, and real-time collect four photodiode signal, according to the change of the signal process, identify the direction of gestures, so as to control the skylight and shade corresponding action. According to the experiment, the accuracy of single recognition of gesture is more than 90%, which meets the requirements of practical application. References | Related Articles | Metrics

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Study on Shark Fin Position and Flow Field Analysis in Car DU Jun, GAO Zhibin* , LI Dongqi, PAN Yuyang, YE Feixiao 2024, 49(23): 79-83.  DOI: 10.16638/j.cnki.1671-7988.2024.023.016 Abstract ( )   PDF (3229KB) ( )   Automotive shark fins are an indispensable part of the vehicle, and their installation location will affect the vehicle flow field and resistance. For a car model, the effects of shark fins on the flow field around the car body, aerodynamic resistance and lift of the vehicle are discussed by numerical simulation technology. The original model is established by using SolidWorks, and the external flow field of the vehicle is simulated by computational fluid dynamics (CFD) and the drag and lift are calculated. On the basis of the original model, the shark fin is added, and the flow field is simulated and calculated. The research results show that the installation of shark fins at appropriate positions can reduce the aerodynamic drag and lift of the vehicle, and effectively narrow the tail vortex area of the vehicle. Therefore, it is recommended to ensure that the projected area is increased or unchanged to the maximum extent without affecting the line of sight of the rear window, so as to improve the vehicle performance. References | Related Articles | Metrics

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Analysis and Solutions for Factors Affecting Cracks in Car Dome Glass DONG Zhonghui 2024, 49(23): 84-87.  DOI: 10.16638/j.cnki.1671-7988.2024.023.017 Abstract ( )   PDF (1156KB) ( )   In order to explore how to reduce the edge tensile stress of the dome glass by optimizing the design and process parameters, thus reducing the risk of cracking, the paper studies and collects the stress data of the top glass of six production models, and finds that the glass without silver plating and without black edge printing show less tensile stress. The annealing time, width of black edge and coating process are optimized, and the effectiveness of these measures is verified by experiments. The results show that extending the annealing time can slow down the cooling rate of the glass, reducing the width of the black edge helps to reduce the temperature difference, and using the cover coating rather than laser removal can reduce the stress concentration, all of these measures effectively reduce the edge stress and improve the overall safety of the glass. The research is of great significance to improve the safety and stability of electric vehicle dome glass, and provides an effective solution and theoretical basis for the material application and process optimization of dome glass in the automotive industry. References | Related Articles | Metrics

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Research on Solving the Surge Problem of Parking Air Conditioner Based on Improved ISO 7637-2 Evaluation Method ZHANG Fei1,2 , LU Jiansong1,2 , LU Xinbiao1,2 , YAN Hongbo1,2, GAO Baohua1,2 2024, 49(23): 88-91.  DOI: 10.16638/j.cnki.1671-7988.2024.023.018 Abstract ( )   PDF (1663KB) ( )   Parking air conditioner is a new type of automotive electrical appliance that has emerged in recent years, it is widely used in the front and rear installation of heavy-duty trucks due to its high energy efficiency, long endurance, and comfort. With the deepening use of parking air conditioner by drivers, the installation of fuel generators to increase the driving time of parking air conditioner is becoming more and more common, resulting in an increasing number of electrical failures. Based on ISO 7637-2 standard of surge failure evaluation, the failure research is carried out in this paper. By improving the standard experimental methods and optimized circuit design, the problem can be solved. A new evaluation method is established, and it is clear that surge reliability design should adopt different circuit design in different systems. References | Related Articles | Metrics

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Research on Heat Transfer Characteristics of Single and Double Fans and Radiators with Different Aspect Ratios ZENG Zhixin, YU Yanglei* , FENG Bo, RUAN Xianzhen 2024, 49(23): 92-96.  DOI: 10.16638/j.cnki.1671-7988.2024.023.019 Abstract ( )   PDF (3131KB) ( )   In order to study the heat transfer characteristics of fan and radiator assembly, this paper conducts a systematic study on single and double fans and radiators with different aspect ratios based on 3D computational fluid dynamics software, and conducts a comparative analysis of the test results to verify the accuracy of the model and obtain the influence rules of different factors on heat transfer. The results show that under the wind speed of 2～5 m/s, for the studied fan and radiator assembly structure, the heat transfer of the radiator of the same size matching single fan is slightly higher than that of the double fan, and the heat transfer performance is better. Moreover, with the increase of wind speed, the increase of heat transfer shows a slowing trend, and the difference between single and double fan heat transfer first increases and then decreases. With the increase of the aspect ratio, the heat transfer increases, and the velocity uniformity of the air side decreases. When the width of the radiator core increases to a certain value, the velocity uniformity tends to rise. References | Related Articles | Metrics

Testing and Experiment

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Strength Analysis and Fatigue Life Prediction of Automotive Wheel Hubs Based on Workbench JIANG Xuefeng 2024, 49(23): 97-100.  DOI: 10.16638/j.cnki.1671-7988.2024.023.020 Abstract ( )   PDF (1427KB) ( )   As an indispensable and important component in car operation, the reliability of car wheels will directly affect the driving safety of the car. The article uses Performance Requirements and Test Methods for Passenger Car Wheels (GB/T 5534－2015) combined with simulation to conduct static analysis and fatigue life prediction on the 18×10J wheel hub of a certain vehicle model. The dynamic load is decomposed into static load, and multiple load sequences are use to simulate one cycle of wheel fatigue bending test. The minimum fatigue life of the wheel hub is found to be 1.78 × 106 times, which is much greater than the minimum cycle number of aluminum alloy material strengthening coefficient 1.6. It is found that there is a stress concentration area at the hub nut seat, resulting in a shorter lifespan in this area, but it meets the current design requirements. Optimization design can be carried out in future hub optimizations. References | Related Articles | Metrics

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Dynamics Analysis of the Boom System of Aerial Work Platform LIU Mo1 , SHEN Wenju2 2024, 49(23): 101-104.  DOI: 10.16638/j.cnki.1671-7988.2024.023.021 Abstract ( )   PDF (1204KB) ( )   In the practical application of aerial work platform, the boom system is frequently subjected to various vibrations and impacts, which seriously affects the stability of the construction process and even endangering the personal safety of the construction personnel. The paper focuses on the boom system of aerial work platform, aiming to provide theoretical basis for its design, optimization, and control. Taking the DGS25Y telescopic boom aerial work platform as the research object, when its boom system is in the state of micro vibration and low damping, the paper uses the simplified half model of theoretical analysis and the method of combining with MATLAB simulation research to explore the influence of boom stiffness on the boom vibration amplitude of aerial work platform, reveals the law affecting the boom head vibration, and provides a theoretical basis for the design and optimization of aerial work platform. References | Related Articles | Metrics

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Comparative Study on the Performance of Steel-aluminum and All-aluminum Body Based on the Same Platform Architecture WANG Chen, XIE Feng, YANG Wanqing, CHEN Dong, LU Zhengqian 2024, 49(23): 105-109.  DOI: 10.16638/j.cnki.1671-7988.2024.023.022 Abstract ( )   PDF (1850KB) ( )   The lightweight automobile body is a key subject in the design and development. Based on the existing steel and aluminum hybrid body platform of electric vehicles, under the premise of keeping the structure of the lower body unchanged, the original steel material of the upper body is replaced by aluminum material by equivalent stiffness and sensitivity analysis method, and the performance of the body is systematically compared. The results show that the weight of allaluminum body structure is reduced by 20% and the lightweight coefficient is increased by 18% compared with that of upper steel and under aluminum body structure on the premise that the key performance of the body bending and torsional stiffness, bending and torsional model, collision performance is basically the same. It provides important theoretical support and guiding significance for the structural design and application of aluminum alloy materials in the future. References | Related Articles | Metrics

Process·Materials

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Optimization and Verification of Carbon Fiber Composite Laminate Layup Process YU Zhenhuan1 , ZHANG Na2 , TIAN Liang1 , CHEN Wenbo1 , ZHAO Jiancheng1 2024, 49(23): 110-114.  DOI: 10.16638/j.cnki.1671-7988.2024.023.023 Abstract ( )   PDF (1891KB) ( )   The demand for carbon fiber products in the field of car modification and customization is growing rapidly, but the research on manual lamination technology is relatively lack. A method of manual carbon fiber lamination layup of automotive trim parts is proposed, and the parameter process table and the evaluation dimension of appearance quality of carbon fiber trim parts after optimization are given. The solutions to the problems of the relationship between the viscosity of the primer and time, the formation of surface rubber bubbles, uneven pressure distribution and avoiding material waste are proposed and verified by experiments. The results show that: the best static time for the adhesive primer and carbon cloth is 60 s, the curing temperature of the surface adhesive is 60 ℃ and the holding time is 10 min, the coating amount of the surface adhesive at the characteristic surface of the trim is twice that of the plane, the film winding method can ensure uniform pressure, the edge length of the carbon cloth is 2 cm longer than the work piece is the best cutting size, and the drying temperature of the finish paint is 60 ℃ and the holding time is 20 min. The research has contributed to the improvement of manual carbon fiber lamination technology in the automotive customization industry, and its application potential can be extended to other fields requiring high-performance composite solutions. References | Related Articles | Metrics

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Research on Electric Control System for Welding Rear Wheel Housing of Automobile Side Wall WANG Shanshan 2024, 49(23): 115-120.  DOI: 10.16638/j.cnki.1671-7988.2024.023.024 Abstract ( )   PDF (2532KB) ( )   In the era of industry 4.0, the manufacturing mode of automobile is developing in the requirements of the automobile manufacturing process in the welding workshop, and effectively direction of lean and flexible. The vehicle welding process has also become precise and intelligent, and the product quality has been greatly improved. The welding process of automobile rear wheel cover is the first step of the side line welding process. In order to realize the automation of automobile manufacturing process and improve the precision of welding process, according to its process characteristics and the control requirements of welding operation in the workshop, the electric control system of automobile side rear wheel cover welding based on programmable logic controller (PLC) control is studied. The system takes Siemens S7-1500 as the control core, adopts the form of "master station+remote station", completes the signal transmission between PLC and upper computer and field equipment through Ethernet and PROFINET, and finally displays the system parameters and fault information on the human machine interface (HMI) human-computer interface in real time. Through the simulation verification, the fixture, robot, turntable and other equipment can act according to the preset parameters, and the interlocking function is normal. The electric control system for the welding of the side wall rear wheel housing meets the welding control requirements of the automobile manufacturing process in the welding workshop, and effectively improves the production efficiency of the enterprise. References | Related Articles | Metrics

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The Application of Dual-arm Three-Coordinate Measurement in the Measurement of Entire Vehicles LV Hao, WU Qingliang, ZHANG Dong, MENG Xiansheng 2024, 49(23): 121-126.  DOI: 10.16638/j.cnki.1671-7988.2024.023.025 Abstract ( )   PDF (4605KB) ( )   The automobile components are numerous, the processes are lengthy, and controlling the dimensions during the production process is difficult. There is no direct means to obtain vehicle dimension data for vehicles coming off the assembly line. Based on the characteristics of double-arm three-coordinate measurement, with the goal of minimum cost and universal applicability, and without affecting or damaging the vehicles or the premises, a lifting system is introduced. The existing measurement platform is upgraded and modified to cover the measurement of existing massproduced vehicle models in the company. In order to ensure the consistency and accuracy of the vehicle measurement data, the coordinate system is established by selecting the same positioning reference for the vehicle body fixtures and gauges, in coordination with the vehicle assembly process and standards, to directly obtain the dimensions of vehicle parts. After experimental verification, this method has low investment costs, high universality, accurate data, and is suitable for application in the measurement of complete vehicle products by automotive companies to determine the status of vehicle body product dimensions. References | Related Articles | Metrics

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Development of Long Fiber Reinforced PP on Aluminum-plastic Dashboard Cross Beam LI Zhihu, LI Qiukui, HE Lili, WANG Xuxin, YANG Zhenhuan, GU Qiancheng 2024, 49(23): 127-131.  DOI: 10.16638/j.cnki.1671-7988.2024.023.026 Abstract ( )   PDF (2463KB) ( )   At present, the car cross beam assembly is mainly welded with steel pipes and sheet metal. To develop a low-cost lightweight dashboard cross beam, the article proposes aluminum-plastic hybrid structure which used by long fiber reinforced Polypropylene. It is found that although PP-LGF40 had lower absolute tensile strength and elastic modulus compared to PA-GF60, but its specific strength and specific modulus are comparable. By increasing wall thickness, strengthening ribs, optimizing the topology of the structure etc, the final PP-LGF40 aluminum-plastic car cross beam has been developed which not only meet the performance requirements but also reduce weight by about 40%. This article provides reference and practical guidance for the development of aluminum-plastic hybrid structural components. References | Related Articles | Metrics

Automobile Education

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Research on the Cultivation of Innovative Compound Automobile Talents Oriented by Social Demand CHAI Yi1 , LI Dezhen*2 , ZHANG Yue2 , CHEN Chen2 2024, 49(23): 132-136.  DOI: 10.16638/j.cnki.1671-7988.2024.023.027 Abstract ( )   PDF (1028KB) ( )   With the development and innovation of China's automobile industry, the society's demand for innovative composite automotive talents is increasing day by day, which puts forward new requirements for the comprehensive quality and innovation ability of talents. Based on the new demand of the society for vehicle engineering talents, this paper points out the shortcomings of the existing talent training system in colleges and universities from the two perspectives of innovative thinking shaping and innovation ability training, determines the training goal of innovative compound automobile talents, formulates targeted training strategies. And combined with examples to carry out further research, the final construction of an innovative composite automobile talent training system oriented by social needs to adapt to the development trend of the automotive industry. References | Related Articles | Metrics

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The Reform and Practice of Electric Vehicle Control Technology Course Assessment Based on Superstar Learn ZHANG Chunhua, DAI Haiyan, LI Miaolin 2024, 49(23): 137-140.  DOI: 10.16638/j.cnki.1671-7988.2024.023.028 Abstract ( )   PDF (1175KB) ( )   Electric Vehicle Control Technology course is a professional direction course for vehicle engineering majors. The original assessment method of the course is that the final score accounts for 70%, and the usual score accounts for 30%. The students have the characteristics of preexamination assault review and low enthusiasm for learning participation. In order to strengthen the management of learning process and improve the diversified process assessment and evaluation system that pays equal attention to ability and knowledge assessment, this paper analyzes the learning situation of the course, and designs a student-centered, curriculum goal-oriented, based on the combination of knowledge assessment and ability assessment based on Superstar Learn, and the combination of process assessment and result assessment. Diversified course assessment methods, and a teaching class as a pilot to practice, practice shows that good application results have been achieved. The process assessment method and practice of the course provide reference for the examination reform of automobile professional courses. References | Related Articles | Metrics

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Research and Practice of Ideological and Political Construction of Automobile Professional Curriculum in Higher Vocational Colleges Based on Employment Orientation ZHAO Wenjuan1 , ZHANG Cuiqing1 , CAO Jing2 2024, 49(23): 141-144.  DOI: 10.16638/j.cnki.1671-7988.2024.023.029 Abstract ( )   PDF (1162KB) ( )   The essence of curriculum ideological and political construction is to cultivate morality and people, and student employment is one of the important tasks in higher vocational colleges. The curriculum ideological and political construction serves the employment work of higher vocational colleges. Therefore, it is inevitably an important task to improve the employment quality of higher vocational colleges. Based on the employment orientation, this paper researches and practices the ideological and political of automobile professional curriculums from six aspects, setting up the curriculum ideological and political teaching team, reorganizing the teaching content, sharing the resources of school and enterprise, enriching the ideological and political carrier, innovating the teaching mode, and establishing a multidimensional evaluation system. It can be seen from the evaluation results of the first and second curriculums that the teaching effect has been significantly improved. This research and practice can also help students to establish a correct view of employment. References | Related Articles | Metrics