International Journal of Automotive Technology最新文献_第7页

Research of Hood on Maintaining Performance Balance Between Dent Resistance and Pedestrian Head Protection 研究油烟机如何在防凹痕和行人头部保护之间保持性能平衡

IF 1.6 4区工程技术

International Journal of Automotive Technology Pub Date : 2024-04-18 DOI: 10.1007/s12239-024-00081-z

Huixia Zhang, Yongwei Shi, Lian Lu, Ligang Gou, Lei Wang, Jun Zhang

{"title":"Research of Hood on Maintaining Performance Balance Between Dent Resistance and Pedestrian Head Protection","authors":"Huixia Zhang, Yongwei Shi, Lian Lu, Ligang Gou, Lei Wang, Jun Zhang","doi":"10.1007/s12239-024-00081-z","DOIUrl":"https://doi.org/10.1007/s12239-024-00081-z","url":null,"abstract":"In the developmental phase of passenger automobile hoods, it is crucial to take dent resistance and pedestrian head protection performances into account. And maintaining a performance balance between the two aspects has proven challenging. With few studies on how to effectively maintain the balance, in this paper, a certain passenger car hood was used as a basic model to investigate structural improvement directions that benefit both performances, by modifying several key variables of the honeycomb shaped inner panel one at a time and then outputting results of hood dent resistance and headform impact through Abaqus and LS-DYNA, respectively. The results indicated that raising the honeycomb inner panel structure at positions with poor stiffness contributes to improvements in dent resistance and pedestrian head protection performance, reflecting in a maximum stiffness increase of 50% and a reduction of 2.98% in the average value of HIC15 change rate. And other alternative improvement options, as well as their effects on dent resistance and pedestrian head protection performance, were provided, providing insights for optimizing the structure of vehicle hood inner panels.","PeriodicalId":50338,"journal":{"name":"International Journal of Automotive Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140613100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigations of Solid Particle Erosion on the Flow Channel Walls of a Radial Turbine for Diesel Engine Applications 用于柴油发动机的径向涡轮机流道壁上的固体颗粒侵蚀研究

IF 1.6 4区工程技术

International Journal of Automotive Technology Pub Date : 2024-04-17 DOI: 10.1007/s12239-024-00089-5

Ma Chao, Sun Yangli, Wang Quan, Chen Gang

{"title":"Investigations of Solid Particle Erosion on the Flow Channel Walls of a Radial Turbine for Diesel Engine Applications","authors":"Ma Chao, Sun Yangli, Wang Quan, Chen Gang","doi":"10.1007/s12239-024-00089-5","DOIUrl":"https://doi.org/10.1007/s12239-024-00089-5","url":null,"abstract":"Carbon particles, a primary component of diesel engine emissions, cause persistent erosion in the exhaust piping system, inevitably leading to performance degradation. This erosion can result in reduced fuel economy and increased emissions. The effects of three key parameters including solid particle size, turbine U/C operating conditions and rotational speed on the erosion characteristics of the flow channels of a radial turbine for vehicle diesel engine applications and their impact on performance were investigated through numerical simulations in the study. The findings indicate that larger particle size and higher rotational speed can significantly lead to the higher erosion rate density of the volute channel and casing wall surfaces. Reducing U/C does not substantially affect the distribution of erosion rate density. Centrifugal force will play an important role in the variation of erosion distribution characteristics. Compared to U/C, the other two key parameters are sensitive factors affecting turbine performance degradation. Under the same condition for operating 5000 h, 10 μm particles cause a 7.5-fold increase in efficiency loss change rate compared to 0.5 μm particles. The efficiency loss at 140 krpm is 16 times greater than that at 40 krpm.","PeriodicalId":50338,"journal":{"name":"International Journal of Automotive Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140617514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling and Load Emulation Experimental Verification of a Vehicle Powertrain System Test Bench Based on Rigid-Flexible Coupling Transmission Shaft 基于刚柔耦合传动轴的汽车动力总成系统试验台的建模和负载模拟实验验证

IF 1.6 4区工程技术

International Journal of Automotive Technology Pub Date : 2024-04-15 DOI: 10.1007/s12239-024-00077-9

Haodi Li, Yongping Hou, Peng Tang, Zhiguo Zhao

{"title":"Modeling and Load Emulation Experimental Verification of a Vehicle Powertrain System Test Bench Based on Rigid-Flexible Coupling Transmission Shaft","authors":"Haodi Li, Yongping Hou, Peng Tang, Zhiguo Zhao","doi":"10.1007/s12239-024-00077-9","DOIUrl":"https://doi.org/10.1007/s12239-024-00077-9","url":null,"abstract":"A long rigid-flexible coupling transmission shaft (RFCTS) is usually used to connect the dynamometer with the device under test (DUT) in semi-anechoic chamber. However, due to the parameter error and torsional vibration characteristic of RFCTS, load emulation loading accuracy of the test bench is lower. Therefore, the research focused on establishing a control-oriented vehicle powertrain system test bench (VPSTB) model based on RFCTS to further improve the load emulation loading accuracy. First, a 14-degrees of freedom (DOF) high-order lumped mass model of VPSTB is established, and the stiffness and moment of inertia equivalent parameters are obtained. Subsequently, a 7-DOF simplified control-oriented VPSTB model is established based on 14-DOF model, and the model parameters are identified by the recursive least squares estimation (RLSE) method with forgetting factor. Simultaneously, the natural frequency of 14-DOF high-order model and 7-DOF simplified model is calculated, then un-damped vibration response of the two models are compared and analyzed. Finally, simulation and experimental are carried out under open-loop and closed-loop conditions, which show that the effectiveness of 7-DOF simplified model parameters, and it also indicate that the 7-DOF simplified VPSTB model can achieve better loading accuracy of load emulation.","PeriodicalId":50338,"journal":{"name":"International Journal of Automotive Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140592089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DE-NOx/CO Performance According to Ag Loading Amount and Support Type of H2-SCR 根据 H2-SCR 的含银量和支持类型确定 DE-NOx/CO 性能

IF 1.6 4区工程技术

International Journal of Automotive Technology Pub Date : 2024-04-15 DOI: 10.1007/s12239-024-00088-6

Choong-kil Seo

{"title":"DE-NOx/CO Performance According to Ag Loading Amount and Support Type of H2-SCR","authors":"Choong-kil Seo","doi":"10.1007/s12239-024-00088-6","DOIUrl":"https://doi.org/10.1007/s12239-024-00088-6","url":null,"abstract":"This study aims to investigate the NOx/CO reduction characteristics of harmful gases according to the loading amount of active Ag, which plays the most important role in H2-SCR, and the type of support. H2-SCR with Ag loaded on support of TiO2 was reduced to Ag+ at about 140 °C in AgO oxide, and H2-SCR with Ag loaded on support of Al2O3 was reduced to Ag clusters (Agnδ+) at about 260 °C in AgO oxide. Because it is more unstable than AgO oxide, it promoted the chemical reaction of Ag. 0.5Ag/TiO2 H2-SCR showed the highest NOx conversion rate of about 18% at 200 °C, and the window width was also widened. 2Ag/Al2O3 H2-SCR improved the low-temperature activity of the catalyst due to its large specific surface area and the loading amount of active catalyst Ag. Although the harmful gas reduction performance has decreased significantly compared to the active material Pt used in the H2-SCR, research on active materials considering the performance the improvement and economic feasibility must be continued.","PeriodicalId":50338,"journal":{"name":"International Journal of Automotive Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140591985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adaptive Model Predictive Control for Intelligent Vehicle Trajectory Tracking Considering Road Curvature 考虑道路曲率的智能车辆轨迹跟踪自适应模型预测控制

IF 1.6 4区工程技术

International Journal of Automotive Technology Pub Date : 2024-04-15 DOI: 10.1007/s12239-024-00086-8

Yin Gao, Xudong Wang, Jianlong Huang, Lingcong Yuan

{"title":"Adaptive Model Predictive Control for Intelligent Vehicle Trajectory Tracking Considering Road Curvature","authors":"Yin Gao, Xudong Wang, Jianlong Huang, Lingcong Yuan","doi":"10.1007/s12239-024-00086-8","DOIUrl":"https://doi.org/10.1007/s12239-024-00086-8","url":null,"abstract":"A parametric Adaptive Model Predictive Controller (AMPC) based on Particle Swarm Optimization-Back Propagation (PSO-BP) neural network has been developed in this paper, the primary focus is on improving the trajectory tracking performance of autonomous vehicles under varying road conditions. The PSO-BP neural network is employed for real-time adjustment of the controller's predictive horizon and sampling time. A vehicle dynamics model is established and an improved tracking control algorithm involving road curvature feedforward is proposed. In the design of AMPC, the real-time update of tire lateral stiffness is achieved through the adoption of the Recursive Least Squares (RLS) method, ensuring the precision of trajectory tracking for the vehicle under varying operating conditions. The simulation platform, which combines Carsim and Simulink, was employed for validating the proposed approach. The findings reveal that the proposed controller can promptly adjust the predictive horizon and sampling time according to the vehicle's state. Through the employed estimation strategy, real-time adjustments of tire lateral stiffness are achieved, allowing for dynamic alterations of vehicle speed and front wheel angle in response to road curvature. As a result, this approach significantly enhances control accuracy and lateral steering stability, especially in large curvature conditions.","PeriodicalId":50338,"journal":{"name":"International Journal of Automotive Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140591989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research and Implementation of an Embedded Traffic Sign Detection Model Using Improved YOLOV5 利用改进型 YOLOV5 研究并实现嵌入式交通标志检测模型

IF 1.6 4区工程技术

International Journal of Automotive Technology Pub Date : 2024-04-15 DOI: 10.1007/s12239-024-00082-y

Tong Hu, Zhengwei Gong, Jun Song

{"title":"Research and Implementation of an Embedded Traffic Sign Detection Model Using Improved YOLOV5","authors":"Tong Hu, Zhengwei Gong, Jun Song","doi":"10.1007/s12239-024-00082-y","DOIUrl":"https://doi.org/10.1007/s12239-024-00082-y","url":null,"abstract":"This study proposes an embedded traffic sign detection system, YOLOV5-MCBS, based on an enhanced YOLOv5 algorithm. This system aims to mitigate the impact of traditional target detection algorithms’ high computational complexity and low detection accuracy on traffic sign detection performance, thereby improving accuracy and real-time performance. Our primary objective is to develop a lightweight network that enhances detection accuracy, enabling real-time detection on embedded systems. First, to minimize computation and model size, we replaced the original YOLOv5 algorithm’s backbone feature network with a lightweight MobileNetV3 network. Subsequently, we introduced the convolutional block attention module into the neck network to optimize the feature fusion stage’s attention and enhance model detection accuracy. Concurrently, we employed the bidirectional feature pyramid network in the neck layer for multi-scale feature fusion. Additionally, we incorporated a small target detection layer into the original network output layer to enhance detection performance. What’s more, we transplanted the enhanced algorithm into a Raspberry Pi embedded system to validate its real-time detection performance. Finally, we conducted computer simulations to assess our algorithm’s performance by comparing it with existing target detection algorithms. Experimental results suggest that the enhanced algorithm achieves an average precision mean (mAP @ 0.5) value of 95.3% and frames per second value of 91.1 on the embedded system.","PeriodicalId":50338,"journal":{"name":"International Journal of Automotive Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140592217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Parallel Parking Path Planning and Tracking Control Based on Simulated Annealing Algorithm 基于模拟退火算法的平行停车路径规划和跟踪控制

IF 1.6 4区工程技术

International Journal of Automotive Technology Pub Date : 2024-04-11 DOI: 10.1007/s12239-024-00087-7

Leiyan Yu, Yongpeng Cai, Xiangbo Feng, Yuanxue Zhou, Zihua Hu, Meilan Tian, Shaohua Sun

{"title":"Parallel Parking Path Planning and Tracking Control Based on Simulated Annealing Algorithm","authors":"Leiyan Yu, Yongpeng Cai, Xiangbo Feng, Yuanxue Zhou, Zihua Hu, Meilan Tian, Shaohua Sun","doi":"10.1007/s12239-024-00087-7","DOIUrl":"https://doi.org/10.1007/s12239-024-00087-7","url":null,"abstract":"To address the issues of curvature discontinuity and terminal tire non-return in the parallel parking of autonomous vehicles, a novel parallel parking path planning method based on the combination of the quintic polynomial curve and an improved sigmoid function was proposed. First, a vehicle kinematic model was established. Second, considering the position, front wheel angle, and yaw angle constraints during the parking process, a hybrid superimposed curve was designed. The parking path planning problem was converted into an optimal control problem, with the maximum curvature and curvature at both ends as objective functions, and the parameters were optimized using the simulated annealing algorithm. Subsequently, for path tracking control, the simulated annealing algorithm was used to optimize the prediction time horizon of the model predictive control algorithm. Finally, a series of actual vehicle experiments were conducted based on the Apollo Autonomous Driving Developer Suite, and the effectiveness of the proposed path planning method was validated. Therefore, this method can provide a certain reference for automatic parking path planning technology.","PeriodicalId":50338,"journal":{"name":"International Journal of Automotive Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140592219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Attitude Tracking Control of All-Terrain Vehicle with Tandem Active–Passive Suspension 带串联式主被动悬架的全地形车姿态跟踪控制

IF 1.6 4区工程技术

International Journal of Automotive Technology Pub Date : 2024-04-11 DOI: 10.1007/s12239-024-00085-9

Liang Wu, Weizhou Zhang, Liwei Ni, Weiwei Jia, Iljoong Youn

{"title":"Attitude Tracking Control of All-Terrain Vehicle with Tandem Active–Passive Suspension","authors":"Liang Wu, Weizhou Zhang, Liwei Ni, Weiwei Jia, Iljoong Youn","doi":"10.1007/s12239-024-00085-9","DOIUrl":"https://doi.org/10.1007/s12239-024-00085-9","url":null,"abstract":"When vehicles with traditional passive suspension systems are driving on complex pavement, the large vibration of the body will result in relatively negative effects on ride comfort, vehicle handling, and stability of passengers and goods. Body attitude tracking control based on tandem active–passive suspension can improve vehicle attitude stability and passability by enabling the body attitude to track an ideal position. In addition, the performance limitations of the actuator are considered in the design of the attitude tracking control algorithms. The attitude tracking performances are investigated in both simulations and real car tests. Two control algorithms which adopt linear quadratic regulator (LQR) and model predictive control (MPC) algorithms, are compared and analyzed in terms of theory and control performance. The simulations and real car tests results show that both attitude tracking control algorithms can effectively track the ideal body attitude with acceptable errors under different pavements, and the control effect of MPC is slightly better than that of LQR. In this way, attitude tracking of car body shows a lot of potential when a vehicle is in harsh environments.","PeriodicalId":50338,"journal":{"name":"International Journal of Automotive Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140592151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on Energy Consumption Optimization Control Strategy of Electric Vehicle Electric Drive Oil/Water Cooling System 电动汽车电驱动油水冷却系统能耗优化控制策略研究

IF 1.6 4区工程技术

International Journal of Automotive Technology Pub Date : 2024-04-11 DOI: 10.1007/s12239-024-00047-1

Xuanyao Wang, Youwang Feng

引用次数: 0

The Adverse Effect and Control of Semi-active Inertial Suspension of Hub Motor Driven Vehicles 轮毂电机驱动车辆半主动惯性悬架的不利影响与控制

IF 1.6 4区工程技术

International Journal of Automotive Technology Pub Date : 2024-04-10 DOI: 10.1007/s12239-024-00075-x

Liu Yanling, Shi Dongyin, Yang Xiaofeng, Song Hang, Shen Yujie

{"title":"The Adverse Effect and Control of Semi-active Inertial Suspension of Hub Motor Driven Vehicles","authors":"Liu Yanling, Shi Dongyin, Yang Xiaofeng, Song Hang, Shen Yujie","doi":"10.1007/s12239-024-00075-x","DOIUrl":"https://doi.org/10.1007/s12239-024-00075-x","url":null,"abstract":"Recently, hub motor driven vehicles (HMDV) have been recognized as the ideal configuration of electric vehicles in the future. However, the adverse effect of its special structure configuration seriously affects the vehicles dynamic performance, and becomes the bottleneck of its further development and industrial application. In this paper, the characteristics of inertial suspension adjusting vertical motion inertia are utilized to suppress the HMDV adverse effect. Firstly, the coupling model of vehicle suspension and hub motor is established, and the coupling excitation of road surface and unbalanced electromagnetic force on vehicle suspension is studied. Aiming at the influence mechanism of the adverse effect, an inertial suspension model of the skyhook and groundhook (SH-GH) algorithm is established. Moreover, with the primary goal of improving the ride comfort, an inertial suspension and the mixed skyhook and power-driven-damper (SH-PDD) algorithm are combined. Particle swarm optimization (PSO) is utilized to optimize suspension performance. The results show that the RMS value of body acceleration, unbalanced radial force and dynamic tire load of inertial suspension decreased by 10.91%, 50% and 8.53%. It is proved that its characteristics can effectively suppress the HMDV adverse effects. The SH-GH inertial suspension also further reduces the vehicle performance index. The SH-PDD inertial suspension reduces the RMS value of body acceleration by 27.45%, significantly improves the vehicle ride comfort. In general, the inertial suspension proposed in this paper can effectively suppress the adverse effect of HMDV vertical vibration, and improve the HMDV ride comfort and road friendliness. It provides a new direction for the research of suppressing the adverse effect of HMDV vertical vibration.","PeriodicalId":50338,"journal":{"name":"International Journal of Automotive Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140592122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0