旧沥青路面材料再生利用调查和评价

结合广佛高速公路大修工程旧沥青路面再生项目,探讨了旧沥青路面材料再生利用调查和评价的内容和方法。并针对广佛高速公路旧沥青路面特点进行了现场调查、系统取样、检测和全面的统计分析,对旧沥青路面材料的性质有了正确了解,为其旧沥青混合料的再生利用提供了详实、科学的依据。     

350km／h铁路客运专线噪声检测验收与评价探析

通过分析噪声产生的原因,探讨噪声验收检测的程序、方法、内容和标准。提出噪声检测验收评价方案、建立高速铁路交通噪声影响评价判别标准,与GB3096---2008声环境质量标准衔接等建议。     

Electric vehicles’ energy consumption estimation with real driving condition data

The use of electric vehicles (EVs) is viewed as an attractive option to reduce CO₂ emissions and fuel consumption resulted from transport sector, but the popularization of EVs has been hindered by the cruising range limitation and the charging process inconvenience. Energy consumption characteristics analysis is the important foundation to study charging infrastructures locating, eco-driving behavior and energy saving route planning, which are helpful to extend EVs’ cruising range. From a physical and statistical view, this paper aims to develop a systematic energy consumption estimation approach suitable for EV actual driving cycles. First, by employing the real second-by-second driving condition data collected on typical urban travel routes, the energy consumption characteristics analysis is carried out specific to the microscopic driving parameters (instantaneous speed and acceleration) and battery state of charge (SOC). Then, based on comprehensive consideration of the mechanical dynamics characteristics and electric machine system of the EVs, a set of energy consumption rate estimation models are established under different operation modes from a statistical perspective. Finally, the performance of proposed model is fully evaluated by comparing with a conventional energy consumption estimation method. The results show that the proposed modeling approach represents a significant accuracy improvement in the estimation of real-world energy consumption. Specifically, the model precision increases by 25.25% in decelerating mode compared to the conventional model, while slight improvement in accelerating and cruising mode with desirable goodness of fit.     

平台罗经惯导工作状态的转换研究

以由二自由度陀螺仪及脉冲积分摆式加速率计构成的平台较经系统的研究对象,讨论了平台罗经向惯导过渡的必要性及可行性,提出了快速平稳过渡方案,最终给出了计算机仿真结果。     

CTC系统残留光带监控方案研究

信号调度集中系统是依靠动、静态数据监控站场轨道区段状态,完成阶段计划兑现工作的,是铁路运输组织的指挥中枢。在信号设备和轨道电路故障、人为操作错误及施工维修等场景下,调度集中系统显示终端会偶发残留锁闭白光带和占用红光带,造成计划自动触发操作中联锁条件检查失败,增加人工劳动强度的同时,还影响行车效率和安全。为此,利用系统中车站自律机的动态进路指令和排路命令,以及静态联锁进路和进路对象的关联关系,构建站场轨道区段状态与计划触发和排路操作的完整业务链路,依靠轨道区段的状态预置和对象状态迁移监控技术,实现残留光带持续安全可靠监控功能。仿真试验表明：该方案在调度集中系统正常工作状态下,满足设计需求,提升了阶段计划兑现效率,保障运营安全。     

列控车载数据中心的软件设计

作为CTCS-3级列控系统的重要组成部分,车载设备在工作过程中会产生大量数据,记录和分析这些数据,有助于发现和解决车载设备存在的问题,提高车载设备运行的安全性和可靠性。为此,研发专门用于下载车载设备数据的设备——车载数据中心。介绍状态机和面向对象程序设计思想在车载数据中心软件开发中的运用,以及采用状态机和面向对象程序设计思想开发车载数据中心软件所带来的益处。     

基于CKF-SVSF数据融合提高CTCS-3级列控系统测速精度的研究

高速列车速度测量值的精确程度直接影响列控系统对列车运行的控制,根据列车速度等参数计算的列车制动距离的准确性也直接影响列车运行安全。针对既有测速算法的不足,提出了采用CKF-SVSF数据融合算法来提高列车速度测量的精确性。相对于传统的滤波算法,该算法充分结合了CKF和SVSF算法的优势。容积卡尔曼滤波算法(Cubature Kalman Filter, CKF)可更加精确地实现对非线性系统的状态估计;滑动可变结构滤波算法(Smooth Variable Structure Filter, SVSF)提供了在非线性系统的模型误差干扰下更具鲁棒性的测量方法。     

STP系统便携式车载检测设备研究

根据无线调车机车信号与监控系统(简称STP系统)车载设备的工作原理和结构特点,分析了车载设备库内维护和检修的现状,提出了一种便携式车载检测设备(简称检测设备)的设计方案。该方案中检测设备采用锂电池供电,通过电台或者串口与STP系统车载主机进行通信,对车载主机与机车各设备的通信状态以及车载主机运行状态进行检测,达到对STP车载设备检测和检修的目的。     

Literature review and fundamental approaches for vehicle and tire state estimation*

ABSTRACT

Most modern day automotive chassis control systems employ a feedback control structure. Therefore, real-time estimates of the vehicle dynamic states and tire-road contact parameters are invaluable for enhancing the performance of vehicle control systems, such as anti-lock brake system (ABS) and electronic stability program (ESP). Today's production vehicles are equipped with onboard sensors (e.g. a 3-axis accelerometer, 3-axis gyroscope, steering wheel angle sensor, and wheel speed sensors), which when used in conjunction with certain model-based or kinematics-based observers can be used to identify relevant tire and vehicle states for optimal control of comfort, stability and handling. Vehicle state estimation is becoming ever more relevant with the increased sophistication of chassis control systems. This paper presents a comprehensive overview of the state-of-the-art in the field of vehicle and tire state estimation. It is expected to serve as a resource for researchers interested in developing vehicle state estimation algorithms for usage in advanced vehicle control and safety systems.     

起停系统蓄电池选型及电池传感器开发

阐述AGM（超细玻璃纤维）阀控密封式铅酸蓄电池的选型、标定及传感器的开发.