摘要：An energy-storage system comprised of lithium-ion battery modules is considered to be a core component of new energy vehicles,as it provides the main power source for the transmission ***,manufacturing defects in battery modules lead to variations in performance among the cells used in series or parallel *** variation results in incomplete charge and discharge of batteries and non-uniform temperature distribution,which further lead to reduction of cycle life and battery capacity over *** solve this problem,this work uses experimental and numerical methods to conduct a comprehensive investigation on the clustering of battery cells with similar performance in order to produce a battery module with improved electrochemical *** were first performed by dismantling battery modules for the measurement of performance *** kmeans clustering and support vector clustering(SVC)algorithms were then employed to produce battery modules composed of 12 cells *** verification of the results obtained from the clustering analysis was performed by measuring the temperature rise in the cells over a certain period,while air cooling was *** was found that the SVC-clustered battery module in Category 3 exhibited the best performance,with a maximum observed temperature of 32℃.By contrast,the maximum observed temperatures of the other battery modules were higher,at 40℃for Category 1(manufacturer),36℃for Category 2(manufacturer),and 35℃for Category 4(k-means-clustered battery module).

摘要：Based on the development demand of electric vehicles, this paper studies the communication network in electric vehicles based on CAN bus after analyzing the LCD (liquid crystal display) in electric vehicles and the status quo of research and development trend about communication network. This system uses TMS320LF2407 DSP as the controller of the control system about central signals. It has also developed the LCD system based on CAN bus and the experiment platform which is applied pure electric vehicles.

摘要：In order to meet the requirement of reliably running which is by Electric vehicle for motor controller, the paper is focused on a sensorless brushless DC motor controller design and a commutation point method. By utilizing the saturation effect of stator iron core, six short voltage pulses are employed to estimate the initial rotor position. After that a series of voltage pulses are used to accelerate the motor. When the motor reaches a certain speed at which the back-electromotive force (EMF) method can be applied, the running state of the motor is smoothly switched at the moment determined by the relationship between the terminal voltage waveform and the commutation phases. “Lagging 90?-α commutation” is bring forward to overcome the shortages existing in the traditional method. The experimental results verify the feasibility and validity of the proposed method.

摘要：航天运输技术是体现国家航天实力的重要标志,是实现进出空间的重要基础.经过几十年的发展,一次性运载火箭技术已经相对成熟,但仍面临着高可靠、高安全、低成本、快速发射、提升运载能力等挑战.重复使用航天运输系统是指能够实现往返于宇宙空间和地球之间,或在外层空间轨道之间飞行,执行任务后可返回地面,并可以多次使用的航天运输系统,如图1所示.重复使用航天运输系统技术的发展一直是航天运输领域研究的热点和难点.通过采用重复使用设计理念和简易发射方式,能够有效缩短发射周期、提高发射灵活性,同时基于多次重复使用、费用均摊的原则,可以大幅降低发射费用,最终实现低成本自由进出空间、高效利用空间、和平开发空间.

摘要：针对UUV(Unmanned Underwater vehicle)越来越复杂的水下作业问题,该文章基于分布式实时系统,提出了一种采用MIL-STD-1553B总线实现UUV系统中各子系统之间数据实时传输的方法;该方法不仅简化了系统设计,而且有效地提高了系统的实时性;该系统的软件设计基于VxWorks实时操作系统,并讨论了1553B通信程序的设计思想和方法;经实际测试结果表明,采用1553B总线技术的UUV在水下航行和多任务作业中,实时性和稳定性都符合设计要求。

摘要：针对参与通信的各周期信息特点设计优化的多功能车辆总线周期扫描表对提高列车通信网络的实时性能具有重要作用;标准推荐的周期轮询算法存在周期信息分布不均匀,带宽利用率相差较大的问题,在对周期扫描表的优化设计方法进行深入研究后,提出基于模拟退火算法的优化方案。建立了周期信息通信模型,详细阐述了通信抖动的概念并对其进行了定义。给出了优化目标函数并采用模拟退火算法进行求解,对算法的几个关键步骤进行了设计,并采用改进策略提高了模拟退火算法效率。通过实例仿真证明该算法实现了周期信息在整个宏周期范围内的均匀分布,优化了周期扫描表的构造。

摘要：Road friction coefficient real-time estimation methods is an important issue and problem in automotive active safety con- trol system development. First a fixed feedback gain sliding mode observer of road adhesion coefficient is designed through the es-tablishment of tire/road dynamic friction model in this article. The simulation results shows that the observer can well real-time iden-tify the current road adhesion characteristics. And more importantly, the observer only need wheel speed signal and the braking torque （brake pressure） signal, so the system is low cost, and its adaptability is good. There is no doubt this estimation method has a good application prospect.

摘要：为了提高自适应巡航控制(ACC)系统的仿真精度,利用实车ACC系统的执行机构建立了硬件在环仿真(HILS)平台。HILS平台由仿真模型和硬件部分组成。仿真模型将运行在d SPACE仿真系统中,包括为了产生雷达模拟信号、ACC控制指令及计算车辆运行状态的雷达模拟器、ACC控制器和车辆模型。硬件部分主要包括电子节气门系统、主动制动系统及其附属的传感器及控制器等。通过串口通信接收来自ACC控制器的指令,HILS平台的硬件可以完成节气门开度和制动压力跟随控制。利用HILS平台进行了不同工况下的ACC仿真试验,仿真结果表明:HILS平台工作状况良好,并可以用于ACC控制器的开发。

摘要：基于RT-LAB设计了一种双向单相AC/DC+双向半桥DC/DC的车载充放电装置,能进行电动汽车充放电过程中的电压电流控制,实现电动汽车与电网的双向能量互动,并且在不接电网时可提供220 V/50 Hz车载电源。通过RT-LAB实时仿真,验证了控制策略的正确性。实时仿真平台可为V2G(vehicle to Grid)技术的进一步研究提供借鉴意义。