Due to the complex and changeable train operation environment and the unstable and time-varying parameters, accurate modeling is limited. Therefore, a modified active disturbance rejection control algorithm based on feedforward compensation (FC-MADRC) is proposed targeting the speed control problem of trains under the circumstances of external disturbances, which reduces the dependence on the train model. Firstly, the state space equation is established based on the single-particle mathematical model of the train, and all the running resistances are regarded as disturbances. Secondly, the FC-MADRC algorithm is designed. Based on the terminal attractor function and the novel Sigmoid function, an improved tracking differentiator (ITD) is designed. An improved fal (nsfal) function with better smoothness is constructed by using the properties of the Dirac δ function, and an ameliorative nonlinear state error feedback (ANLSEF) and a modified extended state observer (IESO) are designed based on the nsfal function. Furthermore, based on the thought of PID, the integral term of error is introduced into ANLSEF for the nonlinear operation to reduce the steady-state error of train speed tracking. In order to promote the robustness and control accuracy of the system, the feedforward compensation term and disturbance compensation term are combined to perform dynamic compensation for disturbances in real time. Finally, the simulation is carried out with CRH380A train data. The results indicate that compared with conventional ADRC and 2DOF-PID, FC-MADRC has the more vital anti-disturbance ability and higher tracking accuracy. FC-MADRC has the advantages of solid anti-disturbance, fast response, and high tracking accuracy. Under the premise of external disturbance, it can still achieve accurate speed tracking under different road conditions.

针对城轨列车自动驾驶(ATO)系统在控制列车实现自动运行的过程中,需同时满足列车运行准点性、精确停车、舒适性及节能性等多性能指标的要求,提出将改进粒子群优化(PSO)算法和模拟退火(SA)算法相结合的速度曲线优化方法.首先,建立城轨列车运行控制模型和多目标优化模型,并对城轨列车运行工况策略进行分析;然后,将PSO的种群信息共享特点和SA以一定概率接受劣质解的特点进行有效结合,使PSO算法避免陷入局部最优解,提高全局寻优的概率.同时,对PSO中的惯性权重系数和学习因子等参数进行全局自适应性改进,进一步搜寻全局最优解;最后,选取明珠线1000m线路条件,综合考虑线路限速和坡度等因素,通过实例仿真实验对比多种智能算法,验证了所提算法在满足多种指标的前提下,将能耗减低了7.7％,同时寻求最优的工况控制序列指导列车运行,验证了算法的有效性和正确性.

The robust guarantee of train control on-board equipment is inextricably linked to the safe functioning of a high-speed train. A fault diagnostic model of on-board equipment is built utilizing the integrated learning XGBoost (eXtreme Gradient Boosting) algorithm to help technicians assess the malfunction category of high-speed train control on-board equipment accurately and rapidly. The XGBoost algorithm iterates multiple decision tree models to improve the accuracy of fault diagnosis by lifting the predicted residual and adding regular terms. To begin, the text features were extracted using the improved TF-IDF (Term Frequency-Inverse Document Frequency) approach, and 24 fault feature words were chosen and converted into weight word vectors. Secondly, considering the imbalanced fault categories in the data set, the ADASYN (Adaptive Synthetic sampling) adaptive synthetically oversampling technique was used to synthesize a few category fault samples. Finally, the data samples were split into training and test sets based on the fault text data of CTCS-3 train control on-board equipment recorded by Guangzhou Railway Group maintenance personnel. The XGBoost model was utilized to realize the automatic fault location of the test set after optimized parameter tuning through grid search. Compared with other methods, the evaluation index of the XGBoost model was significantly improved. The diagnostic accuracy reached 95.43%, which verifies the effectiveness of the method in text fault diagnosis.

为度量列车晚点造成的影响,将传统随机森林(RF)与极端梯度提升树(XGBoost)相结合,采用改进的RF-XGBoost算法对高铁列车运行晚点进行预测.以济青高铁为例,将其原始数据预处理并根据特征重要度排序,选取前7个参数组成晚点特征自变量,以预测到站晚点时间为因变量.将列车实际到达时间等7个特征变量输入RF-XGBoost预测模型中参与训练.前200次列车的晚点预测结果表明:预测晚点与实际晚点时间的曲线变化趋势大致相同.相较于XGBoost算法,本文提出的方法MAE和RMSE值分别降低60.5％与44.8％,R2值提高14.6％,且在允许预测误差5 min的范围内,精度达到97.78％,此方法拥有更优的晚点时长预测性能,对铁路实时调度与提升客运质量至关重要.

This paper combines operation control strategy and operation curve to address the problems of frequent switching and high energy consumption of traditional ATO control policies. Firstly, based on the Pareto principle, the objective optimisation model is established based on urban rail trains' punctuality and energy consumption. Then, a multi-objective quantum particle swarm optimisation (MOQPSO) algorithm with fewer control parameters is adopted. The Gaussian mutation operator and crowding distance sorting method are introduced to select the global optimal guidance particles better, and the optimisation effect of the conventional MOPSO algorithm is compared. Finally, the actual data of the Beijing Subway Yizhuang Line are used to verify the algorithm. Simulation results show that the MOQPSO algorithm has advantages in convergence, diversity, and optimisation. At the same time, different control strategies are compared, and the results show that the improved hybrid control strategy has a better optimisation effect on the longer line.

This article mainly designs a new type of ground automatic phase separation device. The electronic switch with thyristor as the component is used to replace the traditional vacuum switch to switch the two-phase voltage when the locomotive passes through the phase separation zone. The conversion time of the two-phase voltage is controlled from 10ms to 40ms by the new ground automatic phase passing device, which is a great improvement compared with the traditional mechanical switch of 300ms. It is verified through simulation experiments that the locomotive conversion time is reasonably shortened, and the overvoltage and impact are reduced when the electronic switch is closed and opened. The rationality and feasibility of the electronic switch are verified.

In factories and mines station, shunting have the primary task of transportation, large and frequent shunting operation has brought serious problems to management; its timeliness and larger traffic requirements of its information integration, operational efficiency, The accuracy is higher. The current information management system is mainly based on reports and printing freight information files. Its information integration is low, and the operation of preparing a locomotive coupler plan is too cumbersome. The author proposes to adopt a graphical shunting based on C/S architecture. Module, automatic preparation of hook plan and locomotive operation diagram, better realization of human-computer interaction and system response.

Neutral section passing technology in railway power supply had always been a technical problem in current domestic traction power supply industry. In recent years, there are many technical schemes for passing neutral section. There are two main schemes of automatic neutral section passing at present: the vehicle control neutral section passing and automatic ground control neutral section passing, the automatic ground control neutral section passing is a relatively popular technical route in both schemes. Now incorporating fail-safe principle of signal specialty in automatic ground control neutral section passing and proposing the logic control system of automatic ground control neutral section passing based on the idea of "fail safe" in the interlocking system, and the risk identification and safety analysis are carried out based on the dynamic fault tree and HAZOP method. The fault tree is constructed based on the results of HAZOP analysis. Finally, the system reliability is quantitatively calculated through the fault tree.

In order to improve the maintenance efficiency of railway signal equipment, reduce the labor intensity of staff, reduce human errors, and realize intelligent fault diagnosis, the expert system and the fault tree are organically integrated, and the knowledge of the expert system knowledge base is used to infer and determine the cause of the failure mode of the system. Providing fault handling methods, suggestions, fault tree technology to generate expert system knowledge base, which intuitively reflects the logical relationship between faults and fault causes, fully reflects the advantages of both fault tree and expert system, and makes the reasoning effect more obvious. Taking the centralized dispatching system (CTC) station subsystem as an example, the realization process of the fault diagnosis and reasoning mechanism integrating fault tree and expert system is detailed.

The development history of passing neutral section technology was introduced, and the advantages of ground auto-passing neutral section technology were analyzed. By analyzing the working principles and system compositions of the ground auto-passing neutral section system, problems such as no backup system and poor reliability were found. A design scheme of ground auto-passing neutral section logical control system was proposed which based on double 2-vote-2 redundant structure and used microprocessor as the arithmetic unit and depended on the mature technology of the secure computer platform. This article analyzed the hardware components of the system, the working logic in the software design, and system reliability. After field testing, the system has verified the output information, added the backup system, reduced the failure rate of the ground auto-passing neutral section system, enhanced the reliability of the locomotive auto-passing neutral section, improved the locomotive operating efficiency, and achieved the requirements of the design.

为改善我国城市轨道交通车辆基地运营管理,分析城市轨道交通控制中心、车辆基地运营管理过程中面临调度信息不同步、信息管理不集中、运营管理不智能、流程管理不高效等主要问题,提出城市轨道交通车辆基地运营管理系统应具有信息采集与共享功能、调度计划自动编制功能、综合调度与指挥功能、综合显示功能等,对城市轨道交通车辆基地运营管理系统进行设计,为城市轨道交通车辆基地调度人员提供良好的决策支持,不断提高城市轨道交通运营管理水平.

After transit comes into the network stage, it faces the challenges in comprehensive traffic intelligent integration. The paper makes an analysis on the study background and development trend of operation control system, and puts forward the technical scheme of advanced and feasible network operation control system. The paper also emphases on the role of signaling control and trafifc command to ensure that the system reaches the expected target.

Based on the current situation of the rapid development of urban rail transit construction and new situation of the independently innovation of signaling equipment, the paper focuses on the program design, technical characteristics, advantages, development strategy and applications of the CBTC based MTC-I systems having completely independent innovation. The future development of the independent innovations in the signaling technologies on China's urban rail transit are discussed and analyzed.

The paper introduces development history and current situation of domestic and oversea modern tram, and main features and right of way of modern tram. It describes modern tram signaling system control mode, architecture and function, and makes proposal on emphasea of independent development in modern tram signaling system.

For the problem that the motion model of metro car is highly nonlinear-unstable-multivariable coupled and uncertain model, train ATO optimization control attracts more and more attention.A control curve tracking method based on CMAC-PID algorithm is presented in this paper. The basic control law is designed by adaptive learning, which can over come the phenomena overshoot and ineffective convergence on conventional PID algorithm. Partly restrain the effects of model parameters perturbation and external disturbances. According to the simulation experiments, the approach improves the existing system in the aspects of tracking ability and robustness, which finally obtain satisfactory conclusion.

The train data interface unit was a multithread,multiple interfacing,multifunctional device which was non-security in communications and played an important part in transmission,records and configurations for the train signal system.According to object-oriented modeling method of UML real-time system,the article analyzed the design composition of the train interface unit,and used the IBM Rhapsody software to establish the relationship of entities between the static model and dynamic model.More thorough research and description were made from UseCase View,Class Diagram,Sequence Diagram and StateChart Diagram.The dynamic models provided a reliable basis and software programming.The system model established by the Prototype mode have been used to the train interface unit,which obtained satisfactory conclusion.

ZC系统是CBTC系统的核心单元之一,主要完成轨旁列车自动防护系统(ATP)功能.地面设备通过DCS与VOBC交互信息,共同完成列车控制功能.在ZC系统开发及集成测试初期,搭建真实环境配合测试不仅成本高昂,而且非常耗时.通过对VOBC及地面环境仿真系统的设计及实现,开发出VOBC仿真环境,为ZC系统开发及在实验室环境下进行测试提供条件.

Based on analyzing the functions of on-board automatic train protection(ATP) equipment in urban rail transit,the simulative testing environment of vehicle external interfaces of on-board ATP equipment for urban rail transit was established and 10 security input parameters and 7 non-security input parameters for testing on-board ATP equipment were defined.According to input parameters,the variable strength covering array was built and the test case collection of on-board ATP equipment,which was made up of 20 test cases,was optimized by using backtrack-based search algorithm.The testing results show that the given test cases only take 1% of the exhaustive test cases,but the test validity is over 90%.It can make effective and reliable test on the functions of on-board ATP equipment and largely cut test cost.Consequently,the validity of the test case generation method of ATP on-board equipment is verified.

Focused on current development situation and function requirement of the Communication Based Train Control (CBTC) technology in urban rail transit,the reasonable system configuration scheme of domestic CBTC system is presented by comparing and analyzing the function and architecture of several typical CBTC systems applied in China.

This paper introduced the theory of MDA firstly.And then,it was adopted the OR DB development method based on MDA,converted a conceptual data model(PIM) into an Oracle 10g ’s OR DB model(PSM) with the help of using a set of transformation rules.Finally,it was given an example to achieve these mappings.