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主办:陕西省汽车工程学会
ISSN 1671-7988  CN 61-1394/TH
创刊:1976年

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    New Energy Vehicle
    Research on Dynamic Modeling Methods and Influence Factors of Vehicle Battery Pack
    LIANG Xinlong
    2023, 48(22): 1-6.  DOI: 10.16638/j.cnki.1671-7988.2023.022.001
    Abstract ( )   PDF (4738KB) ( )  
    The battery pack is difficult to analyze mechanical performance due to its complex mechanical, electrical, thermal and other components system, which brings great challenges to the subsequent benchmark. Therefore, it is particularly important to chose a reasonable modeling method. This paper uses the homogenized model equivalent method and fine pre-treatment, combined with the isotropic material performance data obtained by compression test method, to carry out modal simulation of the battery system and its zero parts respectively. Based on the sweep frequency test data, the validity and accuracy of the model are verified. The material data of the cell and the supporting foam is verified by the test and simulation benchmark. By comparing the sweep frequency test data with or without the foam and with or without the box cover, the influence law of the box cover and the supporting foam on the system stiffness is obtained, and the influence factors and reasons of the differences in the sweep frequency curves of several states are explained.
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    Research on In-situ Steering Device and Control of Wheel Drive Vehicle
    YE Wei
    2023, 48(22): 7-11.  DOI: 10.16638/j.cnki.1671-7988.2023.022.002
    Abstract ( )   PDF (707KB) ( )  
    With the development of hybrid electric vehicles, drivers have higher and higher requirements for the power performance and cross-country performance of hybrid electric vehicles. This paper describes a vehicle device of wheel drive hybrid electric vehicles that can realize the function of in-situ steering and the control method to achieve this function. The driver can activate the in-situ steering function by inputting the driving scene, control mode, rotation direction, target angle and other information on the Pad and then clicking the activation button. The in-situ steering control method is divided into automatic mode and driver mode, which is simple to operate, stable to run, and functional safety. The wheel-drive hybrid device greatly increases the power performance and offroad performance of the hybrid vehicle.
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    Thermal Performance Research of Battery Cover Based on Composite Material
    SHAO Lixing
    2023, 48(22): 12-16.  DOI: 10.16638/j.cnki.1671-7988.2023.022.003
    Abstract ( )   PDF (1868KB) ( )  
    As an excellent lightweight material endless fiber composites have certain advantages in the application of battery cover. New GB-Standard definites thermal propagation requirement. The cover development should focus on both safety and lightweight. Endless fiber composites are mostly thin-walled structures, so when using high energy density battery applications it is still necessary to conduct corresponding thermal runaway performance studies to achieve a balance between lightweight and safety. In this paper, based on battery cover of endless fiber composites, a comparative study of static fire test and fire test with impact is conducted to provide solutions and ideas for the design and material selection of lightweight thermal runaway battery cover cases.
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    Analysis of Torque Optimization Allocation of Distributed Drive Electric Vehicles
    ZHAO Yuehe
    2023, 48(22): 17-22.  DOI: 10.16638/j.cnki.1671-7988.2023.022.004
    Abstract ( )   PDF (1449KB) ( )  
    Electric vehicles using distributed drive have great potential to improve their performance by breaking free from the inherent constraints of traditional driving devices in terms of torque distribution. This article takes a sports distributed drive electric vehicle as the object, and improves the vehicle's multiple driving performance by optimizing the allocation of driving torque for each wheel. According to the driving characteristics of the distributed drive electric vehicle, a vehicle dynamics model is established by using CarSim and Simulink; Corresponding torque optimization allocation control strategies are designed with the control objectives of vehicle energy efficiency optimization and stability; To solve the problem of mutual interference during multi-objective simultaneous control, a multi-objective joint control strategy is designed; Finally, typical operating conditions are selected for simulation experiments, which shows that the torque optimization allocation control strategy based on each objective achieved good control effects; Under the regulation of multi-objective joint control strategy, each torque optimization allocation control strategy can work in coordination and exert energy efficiency according to the actual situation.
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    Power Battery SOC Estimation Based on Extended Kalman Filter
    PAN Zhengjun
    2023, 48(22): 23-27.  DOI: 10.16638/j.cnki.1671-7988.2023.022.005
    Abstract ( )   PDF (907KB) ( )  
    Kalman filter (KF) is an optimal estimation method based on minimum variance estimation, which is suitable for linear systems. However, on-board power batteries have strong nonlinear characteristics during actual operation. The estimation kalman filter (EKF) is obtained by improving the estimation kalman filter. This problem can be solved satisfactorily. Taking ternary lithium battery as the research object, this paper establishes a first-order RC equivalent circuit model as the basic battery model. Based on the experimental data of charge and discharge of lithium battery, the relationship curve of voltage and state of charge (SOC), OVC-SOC, is obtained by using MATLAB fitting. The least square method is used for parameter identification, and the EKF algorithm is used for real-time estimation of power battery SOC.
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    Structural Design of Hybrid Power Supply System for Pure Electric Vehicle
    SHI Lang
    2023, 48(22): 28-33.  DOI: 10.16638/j.cnki.1671-7988.2023.022.006
    Abstract ( )   PDF (2183KB) ( )  
    Taking the composite power supply system of pure electric vehicles as the research object, this paper analyzes and studies the advantages and limitations of four traditional composite power supply topologies. Based on the composite power supply controlled by supercapacitors, a new type of composite energy storage system topology is designed, with supercapacitors participating in the entire process and significantly improving utilization efficiency. To verify the rationality of the new topology structure, simulations are conducted under AVL Cruise. The simulation results showed that compared to traditional composite power structure electric vehicles, this new structure further reduces the charging and discharging current of the power battery, and further improves the driving range of the entire vehicle.
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    Development and Design of a Type of Full Display Mirror
    XIONG Dongjian
    2023, 48(22): 34-37.  DOI: 10.16638/j.cnki.1671-7988.2023.022.007
    Abstract ( )   PDF (869KB) ( )  
    Traditional inside rearview mirror uses optical reflection to provide the driver with rear vision. However, due to the characteristics of the body structure, the C-pillar and the rear headrest will bring a great blind spot of vision. In this paper, a full display mirror solution is proposed. It can solve the problem of blind spot monitoring behind the car, and can meet the needs of observe the vehicles behind car in daily driving with clarity, real-time, and anti-glare feature, significantly increase the safety factor. By analyzing the structure and function of various types of interior rearview mirrors, this paper provides a basis for the selection of vehicle interior rearview mirrors with different class of vehicles. At the same time, the basic structure, working principle and trend of full display mirror are studied, which provides a basis for the subsequent application of the streaming media rearview mirror.
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    Random Vibration Analysis and Optimization of Electric Vehicle Battery Box Based on Finite Element Analysis Method
    LIU Chao
    2023, 48(22): 38-42.  DOI: 10.16638/j.cnki.1671-7988.2023.022.008
    Abstract ( )   PDF (1420KB) ( )  
    In electric vehicles, the battery box is the main component that supports the power battery, directly affecting the overall efficiency of the electric vehicle. On the basis of describing the vibration theory of the battery box of an electric vehicle traveling on uneven roads, the finite element analysis method is used to complete the statics analysis and vibration analysis of the battery box of an electric vehicle under various working conditions, and then the random vibration characteristics of the battery box in the driving process are obtained. Finally, the overall performance of the battery box is improved through structural optimization, which plays a key role in improving the safety and stability of the electric vehicle.
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    Intelligent Connected Vehicle
    Research on Pedestrian Detection Algorithms in Low Illumination Traffic Scenes
    LIU Kaitian
    2023, 48(22): 43-48.  DOI: 10.16638/j.cnki.1671-7988.2023.022.009
    Abstract ( )   PDF (4128KB) ( )  
    The quality of pedestrian images collected by autonomous vehicle mounted cameras in low illumination traffic scenes is poor due to insufficient lighting and complex environments, and subsequent detection algorithms are difficult to ensure sufficient detection accuracy. Therefore, in response to the problem of poor pedestrian detection performance in low illumination traffic scenes, this paper proposes a pedestrian detection algorithm based on improved YOLOv4-Tiny. First of all, the output of 8 times down sampling feature map is increased for the backbone network, and the deep semantic information and shallow semantic information are fused from bottom to top to enhance the detection ability for small targets. At the same time, the attention mechanism module is introduced before the fusion of different feature maps, making the network pay more attention to key feature information. Secondly, SPP-Net is used to improve the Receptive field and robustness of the network. Using K-means clustering algorithm to generate a new prior box for pedestrian targets, replacing traditional non maximum suppression methods with Soft-NMS method. The improved network model is labeled YOLO-IPD, and experiments have shown that the YOLO-IPD model proposed in the article performs well on a self built dataset.
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    Driver Intention Recognition Method Based on Touch Information
    ZHANG Rui
    2023, 48(22): 49-59.  DOI: 10.16638/j.cnki.1671-7988.2023.022.010
    Abstract ( )   PDF (4540KB) ( )  
    With the continuous development of artificial intelligence and autonomous driving technology, autonomous driving technology based on electrification, networking, intelligence, and sharing has become the main development direction of the future automotive industry. However, due to the limitations of current autonomous driving technology and relevant policies and regulations, it can be foreseen that human-machine co-driving will exist as a transitional stage towards autonomous driving for a long time. Therefore, this paper proposes a machine learning method based on convolutional neural networks to address the issue of driver operation intention recognition in human-machine co-driving. Starting from the steering wheel that the driver has the longest contact with, the problem of operation intention recognition is transformed into a problem of image classification and recognition through feature training of tactile pressure images, accurate identification of different driving intentions of drivers (grip driving intentions, grip driving intentions, dangerous driving intentions) has been achieved. The simulation results show that the accuracy of intention recognition exceeds 97%, which has important theoretical and practical value for the future research of vehicle assisted driving systems in human-machine co-driving control.
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    Research on Security Evaluation Technology and Countermeasures of Vehicle Communication with Domain Controller Architecture
    YE Feifan
    2023, 48(22): 60-65.  DOI: 10.16638/j.cnki.1671-7988.2023.022.011
    Abstract ( )   PDF (1792KB) ( )  
    With the gradual development trend of the "new four modernizations", the electronic and electrical architecture of automobiles tends to be modular and centralized, and a centralized electronic and electrical architecture represented by the domain controller architecture appears. This paper firstly summarizes the domain controller architecture from the background, typical architecture design and practical application, and then analyzes the security threats of vehicle communication under the domain controller architecture. Based on the existing security threats and practical test cases, this paper introduces the evaluation technology of vehicle communication security under domain controller architecture. Finally, some reasonable suggestions are put forward to strengthen the communication security of domain controller architecture from three aspects: hardware security module, communication encryption and authentication, and interdomain isolation.
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    Construction Status Analysis and Development Suggestions of Closed Test Field for Automatic Driving
    YAN Huijiang
    2023, 48(22): 66-71.  DOI: 10.16638/j.cnki.1671-7988.2023.022.012
    Abstract ( )   PDF (1038KB) ( )  
    In the context of new opportunities, new tasks, new stages and new environments for the development of the automatic driving industry, the construction of the closed test site of automatic driving needs to be continuously optimized and improved, innovated and upgraded, so as to better play the promoting role of supporting the healthy development of automatic driving technology. In order to study the scientific and advanced nature of the construction of automated driving closed test sites, the paper compares and analyzes the construction of relevant test sites at home and abroad, and puts forward suggestions for the development of China's automated driving closed test sites, and respectively from "innovative infrastructure construction to meet the landing needs of limited scenarios of automated driving; pay attention to the training of test talents, and strive to improve the testing ability of automatic driving technology; explore international cooperation mechanisms to achieve automatic driving test data sharing and expansion; strengthen publicity to the public and popularize the knowledge of automatic driving closed site testing "at four levels.
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    Design and Research
    Analysis of Vibration Characteristics and Structural Optimization of a Step Tube Beam
    YANG Ming
    2023, 48(22): 72-79.  DOI: 10.16638/j.cnki.1671-7988.2023.022.013
    Abstract ( )   PDF (4334KB) ( )  
    In order to solve the problem of insufficient strength in the design of a new type of commercial vehicle's step tube beam and achieve the goal of structural lightweight, a finite element model of the step tube beam is established and strength analysis is conducted. Due to the insufficient rigidity of the step, the structural strength and deformation displacement do not meet the reliability design requirements, and improvements need to be improved. Therefore, a new structural optimization method is proposed, which takes the total mass of the structure as the design objective and performs multi-objective optimization of size sensitivity under comprehensive strength conditions. The optimized step tube beam structure not only has good vibration characteristics, but also meets the reliability requirements for strength safety factors under various working conditions. The effectiveness of the simulation results and the feasibility of the lightweight scheme are confirmed through multi-axis coupled vibration durability tests, which solves the problem of insufficient strength of the commercial vehicle's step tube beam and meets the structural lightweight goal. This paper summarizes experimental test data and provides a loading verification method for simulating the strength reliability of step tube beams, which provides a reference for the structural design of similar step tube beams.
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    Analysis and Optimization of Rear Column of Integrated Agricultural Vehicle Based on ANSYS
    CAO Jiatan
    2023, 48(22): 80-84.  DOI: 10.16638/j.cnki.1671-7988.2023.022.014
    Abstract ( )   PDF (1456KB) ( )  
    Automobile column is an important supporting component of automobile, the stiffness and strength of the column determines the stability and safety of automobile driving. Therefore, in the design process of multi-functional integrated agricultural vehicles, it is necessary to carry out scientific and reasonable design analysis of the column to ensure that the car can adapt to the harsh working environment and high intensity of work. The geometric model of the column is established by UG software, the suspension kinematics is simulated by automatic dynamic analysis of mechanical systems ADAMS/Car software, and the strength and stiffness of the column are analyzed by ANSYS software. Thus, the stress and deformation data of the column under the extreme working conditions are obtained, and then the analysis and optimization are carried out, and finally the safe and reliable lightweight automobile column is designed.
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    Whistle Issue and Optimization of the Hood Tip on a SUV
    ZHANG Dongli
    2023, 48(22): 85-88.  DOI: 10.16638/j.cnki.1671-7988.2023.022.015
    Abstract ( )   PDF (1755KB) ( )  
    During the wind noise subjective driving evaluation of a sport utility vehicle (SUV) in the development stage, it is found that there are obvious whistles inside the SUV when the speed at 60~ 100 km/h. The noise data is collected and analyzed, and the whistle frequency is identified to be between 1 800~2 200 Hz. Through the diagnosis, the whistle is identified as coming from the tip of the hood. In order to solve the hood tip whistle issue, the principle of hood whistle is studied firstly; Then the schemes of adding cylindrical spoiler structure, adding sealing strip and increasing flushness between hood and front bumper are studied; Then analyzes the implementation of the above three schemes and determine to implement the scheme of increasing flushness between the hood and front bumper to 4.5 mm; Finally, it summarizes the design standards for subsequent models to avoid the hood tip whistle issue.
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    Analysis of Forward Design of Door Hinge Layout
    QIU Peng
    2023, 48(22): 89-93.  DOI: 10.16638/j.cnki.1671-7988.2023.022.016
    Abstract ( )   PDF (1650KB) ( )  
    With the development of the automotive industry, consumers have increasingly high requirements for the quality of automobile. As a system that customers often see and use, the automobile doors are extremely important to their feelings. In the process of automobile development, door hinges have a significant impact on the overall appearance and quality of door opening and closing operations. The arrangement of hinges is the foundation of door design and also a difficulty. In order to improve the quality and efficiency of door development, this article mainly studies the forward layout method of rotating door hinges, clarifying the requirements, input conditions, layout methods and steps of hinge layout, which has a certain guiding role for engineers who have just entered the door design industry.
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    Design of Outer Dash Insulator and Optimization of Al Foil Issue
    WEN Jie
    2023, 48(22): 94-98.  DOI: 10.16638/j.cnki.1671-7988.2023.022.017
    Abstract ( )   PDF (2014KB) ( )  
    The outer dash insulator is an important part to ensure the noise, vibration, harshness (NVH) performance of the vehicle. However, the non-woven fabric on its surface can not be tolerant of high temperature, so aluminum foil should be covered on its outer surface according to the heat map. This brings the aluminum foil cracking and edge wrinkles and other common appearance problems. Based on the typical cases in actual production process, this paper analyzes the causes of aluminum foil cracking, and from the perspective of the design of insulator, gives the optimization solutions for the aluminum foil cracking of outer dash insulator and other problems at various stages are presented, providing guidance for the subsequent design, development and problem solving of similar parts.
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    Method for Establishing Vehicle Coordinate System of Body Point Cloud Based on PolyWorks
    SHI Chao
    2023, 48(22): 99-103.  DOI: 10.16638/j.cnki.1671-7988.2023.022.018
    Abstract ( )   PDF (2949KB) ( )  
    In the process of vehicle reverse alignment, the construction of vehicle coordinate system of body point cloud is a very important step in vehicle reverse alignment, which is the foundation of digital model of vehicle data reverse design, it is also an important basis for the study of the structural characteristics of automobile parts. Based on an engineering example, this paper uses PolyWorks software to construct the corresponding module of coordinate system, which can quickly and accurately construct the whole vehicle coordinate system of body point cloud, and proves the validity of this method.
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    Design and Analysis of a New Type of Crankshaftless Internal Combustion Engine
    XU Jinggang
    2023, 48(22): 104-110.  DOI: 10.16638/j.cnki.1671-7988.2023.022.019
    Abstract ( )   PDF (2567KB) ( )  
    At present, the problem of improving the thermal efficiency of vehicle internal combustion engine is still one of the main contents of vehicle research. In this paper, a new internal combustion engine structure is proposed from two aspects of reducing mechanical resistance and energy loss. The new internal combustion engine is mainly composed of a crankshaftless piston and an energy converter. Among them, the crankshaft-free piston cancels the crankshaft connecting rod mechanism in the structure. The reciprocating linear motion of the piston solves the problem of side force and can effectively reduce the mechanical resistance. The energy converter is mainly composed of the cylinder valve and the shell. Through the rotation of the cylinder valve and the structure of the shell, the hydraulic oil is used as the medium to realize the energy storage and conversion, which reduces part of the energy loss and improves the combustion thermal efficiency. In addition, the new type of internal combustion engine can use flexible fuel, hydrogen engine provides a new direction for the new type of internal combustion engine fuel, combustion medium uses clean energy hydrogen or ammonia, in line with the national "two-carbon" policy, wide application prospects. The new structure of internal combustion engine proposed in this paper can provide a new idea for improving the thermal efficiency of internal combustion engine.
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    Diagnosis and Optimization of Hybrid Vehicle's Acceleration Booming Noise
    QIAN Ping
    2023, 48(22): 111-114.  DOI: 10.16638/j.cnki.1671-7988.2023.022.020
    Abstract ( )   PDF (2725KB) ( )  
    The booming noise of a hybrid vehicle at little accelerator pedal hybrid electric vehicle direct drive modal are studied. The noise occurs at the engine speed of 2 200 r/min. Through noise and vibration measurements, and by using the signal processing methods such as order analysis, it is confirmed that the booming noise comes from the engine the fourth order, which are transferred and amplified from high voltage harness brackets. Through test, it is found that the mode of high-voltage harness support is 150 Hz, coupled with the fourth order noise at hybird electric vehicle direct drive modal. Based on test results, the simulation model is established. According to the hybrid vehicle control unit acceleration shift point and the modal frequency avoidance strategy, the modal target of the bracket is proposed to be 180 Hz, and optimize the structure. And than the mode of the high voltage harness support system are optimized. The real vehicle verified that the fourth order booming noise is reduced by 3 dB(A) after the modes are improved.
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    Application Matching and Related Problems Solving of AMT for Heavy Trucks
    HAN Xiaoyu
    2023, 48(22): 115-119.  DOI: 10.16638/j.cnki.1671-7988.2023.022.021
    Abstract ( )   PDF (3978KB) ( )  
    In order to effectively solve the related faults caused by heavy truck automated mechanical transmission (AMT) matching with the vehicle, the key points of AMT matching with the vehicle are studied in this paper. The matching points of mechanical connections, control systems, air circuits, and other auxiliary systems are sorted out, and combined with the problems of shifting actuator damage, gear shifting jerks, controller area network (CAN) bus communication faults, and lowtemperature shift jamming in heavy truck AMT, analysis is conducted and solutions are provided which provides ideas and references for troubleshooting heavy truck AMT faults.
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    The Generalized Design of Underbody Platform
    WANG Shengyu
    2023, 48(22): 120-123.  DOI: 10.16638/j.cnki.1671-7988.2023.022.022
    Abstract ( )   PDF (2685KB) ( )  
    The article introduces the universal design of the vehicle underbody, considering key interface factors that affect the generalization of each module. Based on the study of the platform universal design principle, the key design points of realizing the universal, such as structure, block and lap are expounded. On the premise of meeting the platformization requirements of key interfaces and balancing factors such as cost, cycle, performance requirements, and manufacturing process difficulty during the product development, the universality of key components for each module of the vehicle underbody is maximized for making contributions to the rapid and flexible entry of vehicle products into the market.
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    Structural Design and Characteristics Study of the Thrust Rod Support of a Mining Dump Truck
    ZHANG Tingting
    2023, 48(22): 124-127.  DOI: 10.16638/j.cnki.1671-7988.2023.022.023
    Abstract ( )   PDF (1484KB) ( )  
    Due to the very bad operating conditions of mining dump truck, including fatigue conditions such as overload and uneven stress, the frame beam is seriously damaged, which greatly affect vehicle reliability. In order to solve this problem, based on a 90 t mining dump truck as the reference model, this paper takes the straight thrust rod support as the research object, analyzes the load of the frame beam, designs a new thrust rod support structure, and carries out the finite element analysis. The results indicate that the optimized thrust rod bracket can reduce the maximum stress under the static strength of the frame crossbeam, significantly improve the reliability and fatigue life of the entire vehicle, and thereby enhance the safety of the vehicle.
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    Testing and Experiment
    Random Vibration Fatigue Analysis and Optimization of the Hydrogen Storage System Framework
    LI Wei
    2023, 48(22): 128-133.  DOI: 10.16638/j.cnki.1671-7988.2023.022.024
    Abstract ( )   PDF (2655KB) ( )  
    Hydrogen storage system framework of fuel cell is the main structural component bearing hydrogen cylinders and related systems, so the fatigue life of hydrogen storage system framework is particularly important. Fatigue failure of hydrogen storage system framework often occurs in random vibration test. In this paper, modal analysis and random vibration fatigue analysis are carried out on a hydrogen storage system framework of a fuel cell, and it is found that the natural frequencies of X and Y bending modes of the hydrogen storage system framework structure are too low, leading to excessive fatigue damage values of the structure. The free-size optimization method is used to optimize the structure design, which improved the natural frequencies of X and Y bending modes of the structure. Then fatigue damage value of the structure is reduced. The final fatigue damage value of the structure meets the design requirements.
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    Analysis of the Noise Reduction Effect of Car Seat Skin Based on Finite Element Method
    ZHOU Zekui
    2023, 48(22): 134-137.  DOI: 10.16638/j.cnki.1671-7988.2023.022.025
    Abstract ( )   PDF (1614KB) ( )  
    There is a large amount of air in the car, which can be divided into air volume units of different sizes. With the development of science and technology, noise reduction of different degrees of each cavity unit will be realized in the future. Therefore, this paper studies the noise reduction of local space in the car, imports the co-driver seat model into the finite element software HyperMesh, divides local cavity around the seat, and establishes a sound-structure coupling model.When different excitation conditions are applied to the acoustic cavity unit, the sound pressure response of two kinds of artificial leather materials, polyurethane (PUR) and polyvinyl chloride (PVC), are analyzed and compared, which provided a certain reference for noise reduction in the car.
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    Leaf Spring Modeling Method and Stiffness Characteristics Simulation Test Based on Adams
    LIU Biaojie
    2023, 48(22): 138-141.  DOI: 10.16638/j.cnki.1671-7988.2023.022.026
    Abstract ( )   PDF (2172KB) ( )  
    This article is based on discrete multi-beam method,by writing a property file of leaf spring and using Adams/Car module to build a leaf spring model, then simulate the leaf spring static/dynamic stiffness characteristic via Adams/View. Both methods been used to simulate the static/dynamic stiffness in this paper, the results show that the multi leaf spring model established by Adams is basically consistent with the actual stiffness characteristics of the leaf spring.
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    Study on Fatigue Test Method of Automobile Suspension Based on Load Spectrum
    YAO Zhigang
    2023, 48(22): 142-146.  DOI: 10.16638/j.cnki.1671-7988.2023.022.027
    Abstract ( )   PDF (2174KB) ( )  
    At present, most of the bench fatigue test equipment of suspension system in automobile factory can realize multi-axial loading and variable frequency loading, so the input cost of test equipment is high. This paper studies and explores a road spectrum based bench fatigue test method for automobile suspension. The characteristic of this method is to decompose the collected road spectrum load into multiple test loads by using the pseudo-damage equivalent principle. The test loads are all fixed amplitude, fixed frequency and uniaxial, so the requirements for test equipment are not high, and the test accuracy can be achieved. The test results show that the bench fatigue test conducted by this method can get the same test results as the whole vehicle durability test.
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    Process·Materials
    Simulation Analysis of Impact Resistance of Lightweight Composite Sandwich Structure
    WANG Longkui
    2023, 48(22): 147-150.  DOI: 10.16638/j.cnki.1671-7988.2023.022.028
    Abstract ( )   PDF (1897KB) ( )  
    Composite sandwich structures have excellent mechanical properties and are widely used in fields such as aerospace, automobiles, and ships. Three finite element models of composite sandwich structures with different configurations are established, and the damage forms and energy absorption characteristics of the structure under different impact energies are studied. The results show that under the same impact energy, the model two sandwich panel exhibits better impact resistance in terms of damage depth. As the thickness of the sandwich structure increases, the overall stiffness increases, and the peak load that the sandwich panel can withstand increases. From the perspective of energy absorption, when the impact energy is low, the structure with smaller wall thickness actually has better energy absorption effect. However, as the impact energy increases, the larger the wall thickness, the greater the specific energy absorption value, and the better the energy absorption effect.
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    Exploration of Small Batch Wrapping Process Based on 3D Printing
    CHEN Xiaoxu
    2023, 48(22): 151-154.  DOI: 10.16638/j.cnki.1671-7988.2023.022.029
    Abstract ( )   PDF (2250KB) ( )  
    With the development of the automotive industry, consumers have increasingly high requirements for automotive products, paying more attention to the aesthetics, high-end, and comfort of automobiles. In terms of automotive interior, the application of wrapping is also becoming increasingly widespread. For models with low planned production capacity, traditional process solutions may result in cost waste. Adopting advanced processes such as additive manufacturing (3D printing) can achieve low-cost production of small batch wrapping parts. In order to meet the performance requirements of the parts, the wrapping process for additive manufacturing (3D printing) parts is explored, and the application of the wrapping process in the automotive industry, the wrapping process based on additive manufacturing, and the production method of plastic substrates are analyzed. The results show that in the process of using 3D printing technology to achieve small batch production of wrapping parts, selecting the appropriate 3D printing method and printing materials can ensure that the appearance, size and product performance of the parts meet the relevant technical requirements.
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    Use and Maintenance
    Fault Analysis and Maintenance of Automobile Anti-lock Brake System
    ZHONG Quan
    2023, 48(22): 155-158.  DOI: 10.16638/j.cnki.1671-7988.2023.022.030
    Abstract ( )   PDF (1512KB) ( )  
    The increase of the number of automobiles and the diversification of types make the overall development of China's automobile field gradually become close to a virtuous cycle. From the perspective of the automobile field, the fault detection and maintenance of automobile anti-lock braking system is one of the key problems in the process of automobile development and application. Based on this, this paper starts a study. In the early years of Peugeot 307 cars and Passat B5 cars anti-lock braking system fault for the research content, first detail the antilock braking system (ABS) composition and principle, and on the basis of detailed analysis of the car fault, through professional diagnosis and exclusion to determine the real fault cause and location, to provide value reference for relevant staff.
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    Maintenance of the Engine Diagnosis Lighting When Vehicle Braking
    HUANG Tianyuan
    2023, 48(22): 159-162.  DOI: 10.16638/j.cnki.1671-7988.2023.022.031
    Abstract ( )   PDF (1625KB) ( )  
    Electronic control system and controller area network (CAN) bus have been widely used in heavy-duty trucks, the control principle is more complex, fault judgment and maintenance is difficult, and it is urgent to improve the skills of maintenance personnel. Aiming at the circuit fault of a heavy truck with remote throttle, this paper adopts the method of schematic diagram analysis, expounds its control principle and mutual influence relationship, obtains the characteristic law of fault generation through comparative research, guides maintenance personnel to clarify the electronic control principle, CAN bus network, master the ideas and methods of fault judgment, and provide reference for troubleshooting.
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    Automobile Education
    The Practice of Teaching Reform under the Background of Engineering Education Accreditation -Taking the Automotive Electrical and Electronic Control Technology Course as an Example
    GAN Zhimei
    2023, 48(22): 163-167.  DOI: 10.16638/j.cnki.1671-7988.2023.022.032
    Abstract ( )   PDF (1221KB) ( )  
    Automotive Electrical and Electronic Control Technology is a professional core course for automotive majors in colleges and universities, it plays an important role in the achievement of the training goals for automotive majors. Based on the idea of engineering education accreditation, with the teaching reform thinking of "one center, two integration, three combination", carries out the exploration of curriculum teaching reform from the aspects of teaching content, teaching methods, evaluation system. The practice shows that this teaching method can improve the teaching effect and the quality of personnel training.
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    Research and Practice on the Integration of Course Content and Vocational Standards -Taking the Course of Automobile Safety and Comfort System Maintenance as an Example
    HUANG Chaoqun
    2023, 48(22): 168-172.  DOI: 10.16638/j.cnki.1671-7988.2023.022.033
    Abstract ( )   PDF (1089KB) ( )  
    Promoting the integration of vocational education curriculum content with vocational standards is an important aspect of modern vocational education, which is conducive to promoting deep integration between industries, enterprises, and schools, and improving their ability to serve society. Based on the research and analysis of the national vocational standards for automobile maintenance workers and the vocational skill level standards for automobile application and maintenance, and in accordance with the ability requirements of professional positions (groups), the curriculum system of automobile inspection and maintenance technology is reconstructed based on the professional work process in this paper. The knowledge and skill requirements of vocational standards are integrated into the professional curriculum content, achieving the integration of courses and certificates, and improving the quality of talent cultivation.
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    Construction and Realization of Resource Database of New Energy Vehicle Technology Based on OBE Concept
    ZHAO Congcong
    2023, 48(22): 173-177.  DOI: 10.16638/j.cnki.1671-7988.2023.022.034
    Abstract ( )   PDF (1347KB) ( )  
    The development of information technology provides rich materials for teaching and promotes the construction of resource database. How to give full play to the effectiveness of the resource database to improve the quality of teaching and talent training has become an important research direction. Based on the analysis of the construction demand of New Energy Vehicle Technology resource database, this paper takes the concept of outcome based education (OBE) as the guide to construct the basic framework of resource database, analyzes the realization way of resource database, and illustrates the application of resource database in the online and offline blended teaching reform. The construction of the resource database based on the concept of OBE can reflect the dominant position of students learning, enhance the function of the resource database as "able to learn and auxiliary to teaching", and has great significance for improving students’ autonomous learning ability and teaching quality.
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    Standards·Regulations·Management
    Short Cycle Traffic Vehicle Flow Prediction Method for Traffic Intersections Based on CNN-ARIMA
    BAO Wenhua
    2023, 48(22): 178-182.  DOI: 10.16638/j.cnki.1671-7988.2023.022.035
    Abstract ( )   PDF (1337KB) ( )  
    Aiming at the problems of low accuracy and unstable data of existing prediction models in the process of intelligent traffic vehicle flow prediction, this paper proposes a short-period traffic flow prediction method based on the combination of convolutional neural network (CNN) and time series prediction model auto regressive integrated moving average (ARIMA). In this paper, the historical traffic flow data of Wangxi road intersection in Wuhu city within a week is taken as the sample to predict the traffic vehicle flow in the next time period, and the obtained data are normalized and simulated. The simulation results show that the scheme can be applied to traffic control, and the scheme can effectively maintain a high accuracy without being affected by the size of the data set, and the prediction results can provide a better solution to the problem of vehicle congestion in advance.
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    Discussion on the Training Mechanism of Automotive Process Technology Talents under the Digital Wave
    WU Fei
    2023, 48(22): 183-189.  DOI: 10.16638/j.cnki.1671-7988.2023.022.036
    Abstract ( )   PDF (1838KB) ( )  
    With the rapid development of information technology such as digital technology and network technology, new technologies represented by information technology have a profound impact on the cultivation and development of automotive technology talents. Automotive technology talents are indispensable composite talents in current society, facing enormous challenges and opportunities brought by the digital wave. The talent cultivation mechanism also needs to be adjusted and innovated accordingly. Based on the trend of automobile manufacturing process technology transformation to digital transformation, this paper analyzes the development trend of automotive process technology, expounds the current situation and demand of automotive process technology talent cultivation, explores the transformation method of talent cultivation mode, puts forward improvement countermeasures and implementation measures, which helps to cultivate compound process technology talents better and faster, to meet the talent demand of enterprises, and to improve the talent shortage problem of enterprises.
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    The Formulation and Optimization of Standard Working Hours in Automobile Assembly Workshops
    YANG Jiankang
    2023, 48(22): 190-194.  DOI: 10.16638/j.cnki.1671-7988.2023.022.037
    Abstract ( )   PDF (1272KB) ( )  
    At present, with the vigorous development of China's automobile industry, major oems at home and abroad take the operating standard time as an important basis for production planning, and are steadily and effectively carrying out the standard working hours project. Based on the measure- ment of standard working hours for assembly of mass-produced models in the final assembly workshop of our company, this paper optimizes the measurement method of standard working hours, reduces unnecessary auxiliary time, and adjusts the corresponding assembly process, position preparation, logistics plan and equipment operation rate according to the measured standard working hours, which effectively improves the production efficiency and customer satisfaction of the production line. It has certain reference and guiding significance for the product structure design and process route formulation of the subsequent newly developed models in the future.
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    Accident Prediction Based on Fusion Data
    MA Chong
    2023, 48(22): 195-198.  DOI: 10.16638/j.cnki.1671-7988.2023.022.038
    Abstract ( )   PDF (1201KB) ( )  
    In view of the strong correlation between drivers' driving behavior and road traffic accidents, driver accident prediction and risk assessment are conducive to hierarchical management and early warning of drivers, thus reducing accidents, and are widely used in automobile insurance companies, passenger and freight transport operating enterprises and other fields. This paper summarizes the research on accident and accident severity prediction based on fused data with accident data as the main body. First, it introduces the process of accident consequence prediction, then introduces the tree models used by many scholars in the field of accident consequence prediction, including decision tree, random forest and XGBoost, and then realizes and compares the three models based on fused data containing accident data in a city. Finally, it looks forward to the research on accident consequence prediction.
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