基于某款车型的整车电磁抗扰仿真研究

发布时间：2018-03-04 13:17

本文选题：电磁兼容　切入点：传导耦合　出处：《重庆理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着科学与电子技术的发展,汽车已经从传统的机械产品转化为机电一体化的产品,汽车内部系统几乎都被电子产品所覆盖,车外电磁干扰随着大型变电站的增多,LED广告显示屏的广泛运用,未来电动车充电桩设备布置的完善,无人驾驶技术、车联网等新型科技的开发,汽车外部受到的电磁干扰程度也同样不可忽视。为缩短汽车整车电磁抗扰研发周期、降低研发成本,仿真分析常常被用于设计前期进行性能分析预测。整车抗扰试验是考察车辆处于较强的外部场环境时各系统的功能和性能是否正常。此时,由于车身的保护和影响,被考察的系统零部件并不直接置于外部的骚扰环境下,决定零部件所面临的外加场强弱的,是经过车身影响后,零部件所处位置的场强弱。分析一定外加场条件下,车内零部件所处位置的场强,再结合零部件自身的抗扰性能,就可以帮助预测安装在整车上的零部件,在抗扰实验时可能的表现。为了利用仿真分析手段预测整车的抗扰性能,本文对汽车整车在外加电磁场条件下车内的场分布进行了仿真研究。研究的主要内容有:1.通过对电磁兼容理论的学习与汽车的电磁环境的分析,讲述了电磁干扰源的形成机理以及电磁干扰三要素。通过对电磁传播途径的分析,对传导耦合与辐射耦合在理论方面进行了详细说明。2.依据ISO11451-2标准,对喇叭天线进行了实验标定,同时进行了以喇叭天线为辐射源的整车电磁场分布情况测试,得到了实验部分整车电磁分布情况的具体数据。3.根据整车抗扰实验布置参数,在FEKO中进行了整车电磁抗扰仿真的布置,并分别对以喇叭天线和平面波为辐射源进行了整车电磁抗扰仿真,得到了仿真部分整车电磁分布情况的具体数据。4.依据实验与仿真得出的数据,对它们进行数据分析对比。总结出在仿真中建立具体天线有利于提高仿真预测精度。
[Abstract]:With the development of science and electronic technology, the automobile has changed from the traditional mechanical products to the electromechanical products, and almost all the internal systems of the automobile are covered by the electronic products. With the increase in the number of large substations and the widespread use of LED advertising displays, the development of new technologies such as the layout of charging piles for electric vehicles in the future, the development of unmanned technology, and the development of new technologies such as the networking of cars, etc. In order to shorten the research and development cycle of electromagnetic disturbance rejection and reduce the cost of research and development, Simulation analysis is often used for performance analysis and prediction in the early stage of design. The anti-disturbance test of the whole vehicle is to investigate whether the function and performance of each system is normal when the vehicle is in a strong external field environment. At this time, due to the protection and influence of the body, The system parts under investigation are not directly placed in the external disturbance environment. It is the field strength in the position of the parts which is affected by the body of the body that determines the external field strength of the parts, and the field strength of the parts is analyzed under certain external field conditions. The field strength of the position of the parts in the vehicle, combined with the anti-disturbance performance of the parts themselves, can help to predict the possible performance of the components installed on the whole vehicle in the anti-disturbance experiment. In order to predict the anti-disturbance performance of the whole vehicle by means of simulation analysis, In this paper, the field distribution of the whole vehicle under the condition of external electromagnetic field is simulated. The main contents of the study are: 1. Through the study of the EMC theory and the analysis of the electromagnetic environment of the automobile, The formation mechanism of electromagnetic interference source and three elements of electromagnetic interference are described. Through the analysis of electromagnetic propagation path, the theoretical description of conduction coupling and radiation coupling is given in detail. 2. According to ISO11451-2 standard, The horn antenna is calibrated experimentally, and the electromagnetic field distribution of the whole vehicle with the horn antenna as the radiation source is tested, and the specific data of the electromagnetic distribution of the whole vehicle are obtained. 3. According to the parameters of the vehicle anti-disturbance experiment, The whole vehicle electromagnetic disturbance rejection simulation is carried out in FEKO, and the whole vehicle electromagnetic immunity simulation is carried out with the horn antenna and plane wave as the emitter source, respectively. The specific data of the electromagnetic distribution of the whole vehicle is obtained. 4. According to the data obtained from the experiment and simulation, the data are analyzed and compared. It is concluded that the establishment of the specific antenna in the simulation is helpful to improve the accuracy of the simulation prediction.
【学位授予单位】：重庆理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U467.1

【参考文献】