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2019 6th International Conference on Electric Vehicular Technology (ICEVT)最新文献

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Machining Simulation of Ti-6Al-4V Alloy Using Finite Element Method (FEM) Ti-6Al-4V合金的有限元模拟加工
Pub Date : 2019-11-01 DOI: 10.1109/ICEVT48285.2019.8993996
A. I. Ismail, Gusti Umindya Nur Tajalla
Machining of titanium alloys remains a challenging task due to its low thermal conductivity and other inheritance properties. This phenomenon often causes the reduction of tool life, increasing production cost, and time. Several factors play a role in determining the tool life, such as cutting speed, feed, chip formation, and tool geometry. The current work investigated the effect of tool geometry and feed to the cutting temperature, force, and chip formation. The finite element method (FEM) was implemented to model the orthogonal cutting process in the titanium alloy (Ti-6Al-4V). We used the Johnson-Cook (J-C) material constitutive model and the Johnson-Cook (J-C) fracture-damage model to simulate the process. Our results demonstrated that at the rake angle of 0°, the cutting force and the cutting temperature reached a maximum value of 490 °C. The temperature decreased to around 370 °C if the cutting rake angle changes to 10°. The feed seems to have a low impact on the temperature. The effect of feed and rake angle was more pronounced in the cutting force.
由于钛合金具有导热系数低和其他遗传特性,其加工仍然是一项具有挑战性的任务。这种现象往往造成刀具寿命缩短,生产成本增加,时间延长。有几个因素决定刀具寿命,如切削速度、进给、切屑形成和刀具几何形状。目前的工作是研究刀具几何形状和进给对切削温度、力和切屑形成的影响。采用有限元方法对钛合金(Ti-6Al-4V)的正交切削过程进行建模。采用Johnson-Cook (J-C)材料本构模型和Johnson-Cook (J-C)断裂损伤模型对这一过程进行了模拟。结果表明,在前倾角为0°时,切削力和切削温度在490℃时达到最大值。当切削前角变为10°时,温度下降到370°左右。进料似乎对温度影响不大。进给角和前倾角对切削力的影响更为明显。
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引用次数: 1
[Copyright notice] (版权)
Pub Date : 2019-11-01 DOI: 10.1109/icevt48285.2019.8993980
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引用次数: 0
Automotive Real-Time Operating System in Vehicular Technology Progress Review 汽车实时操作系统在汽车技术中的应用
Pub Date : 2019-11-01 DOI: 10.1109/ICEVT48285.2019.8994019
Wirawan Lingga, B. Budiman, P. Sambegoro
Degrees of human intervention for vehicular technology have been decreasing in the past few years. Automated cars and even autonomous ones have been appearing in successive events. One aspect to note is that automated systems for automobiles are believed to follow the technology for electric vehicles. For instance, with electric cars, people no longer have to worry about maintenances for valves, camshafts, connecting rods, crankshafts, transmission gears, clutches, and any other complexities of a car with an engine and a transmission. With a simpler environment for car interiors, we could focus more on enhancing its performance with even less monitoring utilizing automation. It will then require a real-time control system to guarantee timely responses and task priority setups for internal and external events of real-time systems, especially for the migration of Internal Combustion Engine (ICE) vehicles to electric cars.
过去几年,人为干预车辆技术的程度一直在下降。自动驾驶汽车甚至自动驾驶汽车已经接连出现在各种活动中。值得注意的一点是,汽车的自动化系统被认为是在效仿电动汽车的技术。例如,有了电动汽车,人们不再需要为气门、凸轮轴、连杆、曲轴、传动齿轮、离合器以及其他带有发动机和变速器的汽车的复杂部件的维护而担心。有了一个更简单的汽车内饰环境,我们可以更专注于提高其性能,甚至更少的监控利用自动化。这将需要一个实时控制系统,以保证实时系统内部和外部事件的及时响应和任务优先级设置,特别是内燃机(ICE)车辆向电动汽车的迁移。
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引用次数: 2
Experimental Study on the Aerodynamic Performance of Autonomous Boat with Wind Propulsion and Solar Power 风力太阳能自主船气动性能试验研究
Pub Date : 2019-11-01 DOI: 10.1109/ICEVT48285.2019.8994029
J. Setiawan, Bentang Arief Budiman, M. Ariyanto, T. Andromeda, D. Chrismianto, Muhamad Abdul Aziz
The autonomous boat in this research has the capability of using fully renewable energy sources in which its wing sail can provide aerodynamic forces for propulsion while the solar cells provide the power for control and communication systems. Thus, this boat can operate in a long duration, suitable for ocean research and monitoring missions. Similar to an airplane wing, the design of the wing sail is taken from NACA 0018 that can provide good performance in low Reynolds-number. The purpose of this study is to experimentally study the aerodynamic performance of a 1/4th scale wing sail by varying the flap angle in a laboratory set-up. The aerodynamic of wing sail produces lift and drag forces that depend on the wing sail angle of attack. In this study, an encoder is used to measure the angle of attack of wing sail, a potentiometer for measuring the flap angle, and an anemometer for measuring the wind speed. A servo motor is used for controlling the flap angle. The digital data acquisition uses Arduino Uno as the microcontroller which is wired to a PC and coded in MATLAB/Simulink using Arduino package. The experiment results show the wing sail performance, the effect varying flap angles. The total aerodynamic forces were generated in this experiment.
这项研究中的自主船具有完全使用可再生能源的能力,其中其翼帆可以为推进提供空气动力,而太阳能电池为控制和通信系统提供动力。因此,该船可以长时间作业,适合海洋研究和监测任务。与飞机机翼类似,翼帆的设计取自NACA 0018,可以在低雷诺数下提供良好的性能。本研究的目的是在实验室装置中,通过改变襟翼角度,对1/4比例翼帆的气动性能进行实验研究。翼帆的气动特性产生的升力和阻力取决于翼帆的迎角。在本研究中,编码器用于测量翼帆迎角,电位器用于测量襟翼角,风速计用于测量风速。采用伺服电机控制襟翼角度。数字数据采集采用Arduino Uno作为微控制器,连接到PC上,使用Arduino包在MATLAB/Simulink中进行编码。实验结果表明,不同襟翼角度对翼帆性能的影响。本实验产生了总气动力。
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引用次数: 2
Design Study of Battery System Protection Structure Based on Hybrid Material Fiber Metal Laminate (FML) 基于混合材料金属纤维层压板(FML)的电池系统保护结构设计研究
Pub Date : 2019-11-01 DOI: 10.1109/ICEVT48285.2019.8993865
T. Nirmala, A. Jusuf, Sigit Puji Santosa, P. Sambegoro
With the grcopyowing size of the electric vehicle (EV) market, the study of the battery system is paramount. Lithium-ion batteries have a high risk of flammability in the event of an accident or a collision that causes a short circuit. One of the highest potential threats to EVs is ground impact from stones or projectiles impingement that can hit and penetrate the battery pack. Therefore, it is necessary to develop a lightweight structure that can protect batteries in the event of dynamic impact load. The material used for the protection structure is fiber metal laminate (FML), which is a hybrid material consists of thin metal layers bonded together by intermediate composite. Evaluation of the risk of battery fire due to short circuit (battery shortening) and energy absorption of the protection structure is done by using the nonlinear finite element method. Parametric studies were conducted to investigate the effect of thickness, bonding strength, as well as two damage parameters such as failure and softening effect. Simulation results show that increasing the softening parameter can increase energy absorption but also increase the battery shortening. While increasing all the other parameters can increase energy absorption and reduce battery shortening. In this study, the most effective design for the protection structure was obtained, which is 1 mm-thick aluminum as the top and bottom layer, and 4.8 mm-thick carbon fiber reinforced polymer (CFRP) as the intermediate layer.
随着电动汽车(EV)市场规模的不断扩大,电池系统的研究至关重要。在发生事故或碰撞导致短路的情况下,锂离子电池具有很高的易燃性。电动汽车面临的最大潜在威胁之一是石头或弹丸撞击地面,可能会击中并穿透电池组。因此,有必要开发一种轻量化结构,在动态冲击载荷下保护电池。用于保护结构的材料是金属纤维层压板(FML),它是由薄金属层通过中间复合材料粘合在一起的杂化材料。采用非线性有限元法对短路(电池缩短)引起的电池火灾风险和保护结构的能量吸收进行了评估。通过参数化研究考察了厚度、粘结强度以及破坏和软化效应两个损伤参数的影响。仿真结果表明,增大软化参数可以提高电池的能量吸收,同时也可以提高电池的缩短时间。而增加所有其他参数可以增加能量吸收,减少电池缩短。在本研究中,得到了最有效的防护结构设计,即顶部和底部为1 mm厚的铝层,中间为4.8 mm厚的碳纤维增强聚合物(CFRP)层。
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引用次数: 1
Effect of NaTi2(PO4)3 Coating on Improving Capacity Retention of Li-rich Li1.13Ni0.2Co0.2Mn0.47O2 Cathode NaTi2(PO4)3涂层对提高富锂Li1.13Ni0.2Co0.2Mn0.47O2阴极容量保持率的影响
Pub Date : 2019-11-01 DOI: 10.1109/ICEVT48285.2019.8993861
J. Karunawan, M. Irham, Putu Hendra Widyadharma, O. Floweri, A. H. Aimon, Ferry Iskandar
Li-rich NCM is a new promising type of cathode material for lithium-ion battery (LIB) applications. It has been reported that Li-rich NCM delivers superior specific capacity (>218 mAh/g). Despite its outstanding performance, some works have reported instability of the material upon cycling. Coating the cathode materials with a chemically stable material is considered as the best strategy to improve the stability of Li-rich NCM. In this work, Li1.13Ni0.2Co0.2Mn0.47, a type of Li-rich NCM cathode, was successfully synthesized via a simplified solid-state method. The resulted product was then coated with NaTi2(PO4)3 (NTP), a promising phosphate compound with excellent chemical stability and superior ionic conductivity. It was found that NTP-coated Li- rich NCM delivered better electrochemical properties compared to the pristine one, as was determined by charge-discharge battery characterization.
富锂NCM是一种极具应用前景的新型锂离子电池正极材料。据报道,富锂NCM具有优异的比容量(>218 mAh/g)。尽管其优异的性能,一些工作报道了材料在循环时的不稳定性。在正极材料表面包裹化学稳定的材料被认为是提高富锂NCM稳定性的最佳策略。本文采用简化的固态法制备了Li1.13Ni0.2Co0.2Mn0.47富锂阴极。然后用NaTi2(PO4)3 (NTP)包覆所得产物,NaTi2(PO4)3 (NTP)是一种具有优异化学稳定性和优异离子导电性的有前途的磷酸盐化合物。通过对充放电电池的表征,发现ntp包覆的富Li- NCM具有比原始NCM更好的电化学性能。
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引用次数: 0
Estimation of Received Signal Power for 5G-Railway Communication Systems 5g -铁路通信系统接收信号功率估计
Pub Date : 2019-11-01 DOI: 10.1109/ICEVT48285.2019.8994017
Selvi Lukman, Y. Y. Nazaruddin, B. Ai, R. He, E. Joelianto
This paper presents the estimation of received power signal based on Support Vector Regression (SVR). The simulated datasets are used, which contain the positions of transmitter (Tx) and receiver (Rx), the distance of TX and RX, and corresponding path loss, and the carrier frequencies. SVR presents the accuracy estimation of simulated datasets computing which shows Mean Square Error (MSE) as an average value of estimation errors that are squared, Root Mean Square Error (RMSE) as another parameter for measuring the accuracy of a estimation as a root value of MSE Average Root also R² as the coefficient of determination tool for measuring the ability of a model in explaining dependent variable variations. If the value of R² approaches one, it means that predictive results can follow variable patterns or variations well dependent. Cross Validation is a performance measurement. The aim is to find the best hyper-parameter combination so that machine learning can predict data accurately and prevent over-fitting problems. Optimal parameter values are determined by using the Grid Search Method, where machine learning will do modeling using the range C ɤ and ɛ given. Therefore, SVR Hyper-Parameter shows the most optimized parameter with C which affects the penalty given when there is an error in classification, Gamma that affects the pace of learning process, Epsilon indicates the error limit than can be ignored. The parameter values that produce the highest accuracy or the smallest error will be chosen as the best parameter.
提出了一种基于支持向量回归(SVR)的接收功率信号估计方法。模拟数据集包含发射机(Tx)和接收机(Rx)的位置、Tx和Rx的距离、相应的路径损耗和载波频率。SVR提出了模拟数据集计算的精度估计,其中均方误差(MSE)显示为估计误差平方的平均值,均方根误差(RMSE)作为衡量估计精度的另一个参数,作为MSE平均根的根值,R²作为衡量模型解释因变量变化能力的决定工具系数。如果R²的值接近于1,则意味着预测结果可以遵循变量模式或变化。交叉验证是一种性能度量。目的是找到最佳的超参数组合,使机器学习能够准确地预测数据并防止过度拟合问题。通过使用网格搜索方法确定最优参数值,其中机器学习将使用给定的范围C ω和ω进行建模。因此,SVR Hyper-Parameter表示最优化的参数,其中C影响分类中出现错误时给出的惩罚,Gamma影响学习过程的速度,Epsilon表示可以忽略的误差极限。产生最高精度或最小误差的参数值将被选为最佳参数。
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引用次数: 1
The Influence of Aluminum Conductor Shape Modification on Eddy-Current Brake Using Finite Element Method 用有限元法研究铝导体形状改变对涡流制动器的影响
Pub Date : 2019-11-01 DOI: 10.1109/ICEVT48285.2019.8994005
A. Prayoga, Ubaidillah, M. Nizam, H. Waloyo
Vehicles are the most important thing to use by human and to make it safe to use, all vehicle need a safe and reliable braking system, the use of frictional brake can raise the probability of braking failure because of high pressure and temperature operation, to make braking safer, there is a new, alternative braking system called Eddy-Current Brake (ECB) that uses magnet in their braking process. This paper aims to know the influence between the shapes of conductor’s face on braking torque using finite element method, using aluminum with mid-iron in one construction to improve the braking torque produced by conductor. Validation was done before starting FEM calculation to achieve accurate FEM settings, the modeling uses ANSYS Electronics Desktop. The shapes used on conductor’s face are sawtooth, half-circle, and square. The highest braking torque performance on these variables are 15.39213, 16.40432, and 14.25 Nm respectively at their critical speed with a magnetic flux of 0.8 – 2 Tesla at all variables.
车辆是人类使用的最重要的东西,为了使其安全使用,所有车辆都需要一个安全可靠的制动系统,使用摩擦制动可以提高由于高压和高温操作而导致制动失效的概率,为了使制动更安全,有一种新的替代制动系统称为涡流制动(ECB),它在制动过程中使用磁铁。本文旨在利用有限元法了解导线端面形状对制动力矩的影响,采用铝与中铁合一结构来提高导线产生的制动力矩。在开始有限元计算之前进行了验证,以实现准确的有限元设置,采用ANSYS Electronics Desktop进行建模。导体表面使用的形状有锯齿形、半圆形和方形。在临界转速下,当磁通为0.8 ~ 2 Tesla时,制动转矩性能最高,分别为15.39213、16.40432和14.25 Nm。
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引用次数: 2
Finite Element Analysis of CRCP Slab Track System Designed with Active Crack Control 主动裂缝控制的CRCP平板轨道系统有限元分析
Pub Date : 2019-11-01 DOI: 10.1109/ICEVT48285.2019.8993995
P. B. Prakoso, B. Lechner
Ballastless track is designed for long time period of service up to 60 years or even more. It has main goal to achieve a high performance and less significant maintenance during the service. One development of the standard design, which can be introduced to improve a conventional in-situ casted railway slab track, e.g. continuously reinforced concrete pavement (CRCP), is by implementing active crack control construction type. In this system, a CRCP slab is cut in a spacing interval immediately after it reaches a certain level of sufficient hardening state. This study is conducted to discuss the standard design procedures and the performance of slab track using CRCP as rail supporting structure (e.g. Rheda 2000) based on the long year experience of its implementation in Germany and to study parameters of cut spacing and subgrade bearing capacity of the Rheda-2000 designed with active crack control system. A static Finite Element Analysis (FEA) has been carried out using 3D model in ANSYS to assess the performance of the standard Rheda-2000 designed with active crack control system based on ultimate limit state design criteria. The substructure support is also ranged to investigate the limit performance of the system and to represent different levels of subgrade bearing capacity. The assessment is mainly based on the safety factor and comprises a combination of theoretical, analytical, empirical and FEA methods of ballastless track design procedures. The results demonstrate that there is a critical length of cut spacing of the slab and certain required bearing capacity limit of the substructure to achieve an equilibrium and optimal slab track designed with active crack control system.
无砟轨道的设计寿命可达60年甚至更长。它的主要目标是在服务期间实现高性能和较少的重大维护。标准设计的一个发展,可以引入到改进传统的现浇铁路板轨道,如连续钢筋混凝土路面(CRCP),是通过实施主动裂缝控制施工类型。在该系统中,CRCP板坯在达到一定的充分硬化状态后立即进行间隔切割。本研究基于CRCP在德国实施多年的经验,探讨了CRCP作为轨道支撑结构的平板轨道(如Rheda 2000)的标准设计程序和性能,并研究了采用主动裂缝控制系统设计的Rheda-2000的切口间距和路基承载力参数。采用基于极限极限状态设计准则的主动裂纹控制系统设计标准Rheda-2000,在ANSYS中进行了三维模型静力有限元分析(FEA)。下部结构的支撑也进行了研究,以研究系统的极限性能,并表示不同水平的路基承载力。评估主要以安全系数为基础,结合无砟轨道设计过程的理论、分析、经验和有限元分析方法。结果表明:采用主动裂缝控制系统设计的板坯轨道,存在板坯切割间距的临界长度和子结构所需的承载力极限。
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引用次数: 2
Real-Time Image Processing Method Using Raspberry Pi for a Car Model 基于树莓派的汽车模型实时图像处理方法
Pub Date : 2019-11-01 DOI: 10.1109/ICEVT48285.2019.8993866
M. Ariyanto, I. Haryanto, J. Setiawan, M. Munadi, M. S. Radityo
This paper presents the development of a car model that can detect edge, line, and corner of the road image and also the model can detect the red color of a traffic light image. The car model is equipped with a camera which is used for computer vision purpose. The image comes from a camera is read by using Raspberry Pi single-board computer. The algorithms for image processing methods are selected to detect edge, line, corner, and traffic light color of the road model. The algorithms are developed in Simulink diagram block and embedded into Raspberry Pi using Simulink Support Package for Raspberry Pi Hardware. The embedded algorithms for detecting line, edge, corner and red color of traffic light will be tested. The test will be conducted in real-time mode. Based on the test results, the embedded image processing algorithms can successfully detect line, edge, and corner of the road images, and detect the red color of traffic light image.
本文提出了一种能够检测道路图像的边缘、直线和角的汽车模型,该模型还可以检测交通灯图像的红色。这个汽车模型配备了一个用于计算机视觉的摄像头。图像来自摄像头,通过树莓派单板计算机读取。选择图像处理方法的算法,检测道路模型的边缘、直线、角和交通灯颜色。算法在Simulink图块中开发,并使用Simulink硬件支持包嵌入到树莓派中。将测试用于检测交通灯的线、边、角和红色的嵌入式算法。测试将在实时模式下进行。基于测试结果,嵌入式图像处理算法可以成功检测道路图像的线、边、角,检测红绿灯图像的红色。
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引用次数: 7
期刊
2019 6th International Conference on Electric Vehicular Technology (ICEVT)
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