J. Lv, Haifeng Wang, Hongjie Liu, Lu Zhang, T. Tang
{"title":"A model-based test case generation method for function testing of Train Control Systems","authors":"J. Lv, Haifeng Wang, Hongjie Liu, Lu Zhang, T. Tang","doi":"10.1109/ICIRT.2016.7588752","DOIUrl":"https://doi.org/10.1109/ICIRT.2016.7588752","url":null,"abstract":"Potential faults in safety critical systems may lead to system failures thus bring huge human injuries. How to ensure the correctness of the system during the system development is very important. System function testing has been regarded as an effective approach which normally applied in the final stage of system development to ensure the consistence of system functions and specifications. In this paper, an integrated model-based test case generation method combining Hybrid Communicating Sequential Processes (HCSP) and Timed Automata is introduced, in which HCSP is used to formally model the scenarios of the system, while Timed Automata is used to verify the system properties in HCSP models. To bridge the gap between the HCSP model and Timed Automata model, transition rules are defined according to the characteristics of systems. Based on the Network Timed Automaton model, a tool chain (UPPAAL and CoVer) is presented to automatically generate test case with coverage criteria in a simple and flexible manner. The tool chain is also applied to analyze the typical Radio Block Center (RBC) handover scenario in Chinese Train Control System Level 3 (CTCS-3). Logical and timing properties of the case study are verified and different test case suites of Vital Computer (VC) components in RBC handover model are automatically generated with different coverage criteria.","PeriodicalId":427580,"journal":{"name":"2016 IEEE International Conference on Intelligent Rail Transportation (ICIRT)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114783306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lei Chen, Phillip James, D. Kirkwood, Hoang Nga Nguyen, G. Nicholson, M. Roggenbach
{"title":"Towards integrated simulation and formal verification of rail yard designs - an experience report based on the UK East Coast Main Line","authors":"Lei Chen, Phillip James, D. Kirkwood, Hoang Nga Nguyen, G. Nicholson, M. Roggenbach","doi":"10.1109/ICIRT.2016.7588753","DOIUrl":"https://doi.org/10.1109/ICIRT.2016.7588753","url":null,"abstract":"The development of railway systems is often supported by a range of tools, each addressing individual, but overlapping concerns such as, e.g., performance or safety analysis. However, it is a challenge for users to organise work-flows; results are often in different, non-aligning data formats; furthermore, tools work on different levels of abstraction from macro to microscopic. Thus, tool integration would be beneficial, and also allow for more playful, experimental prototyping and design. This paper reports on lessons learned from the integration of BRaVE - the Birmingham Railway Virtual Environment - and OnTrack from Swansea University. BRaVE is an easy-to-use railway simulation software for development, modelling and flow analysis. OnTrack allows for the automatic verification of scheme plans against a number of safety properties via different formal methods. We present an approach that bridges the gap that occurs from varying details in data sources through automated transformations. This integration provides a first step towards a seamless environment for prototyping, concept development, and safety analysis under ”one roof”. We demonstrate the usefulness of our approach by giving integrated simulation and verification results for the UK East Coast Main Line. This work is part of the wider RSSB's Future Traffic Regulation Optimisation research programme.","PeriodicalId":427580,"journal":{"name":"2016 IEEE International Conference on Intelligent Rail Transportation (ICIRT)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123485651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jinwen Wei, Qian Xu, D. Kirkwood, Yuemiao Wang, Lei Chen, L. Jidong, Jingwei Sun
{"title":"Verification of metro track signalling layout based on microscopic simulation","authors":"Jinwen Wei, Qian Xu, D. Kirkwood, Yuemiao Wang, Lei Chen, L. Jidong, Jingwei Sun","doi":"10.1109/ICIRT.2016.7588774","DOIUrl":"https://doi.org/10.1109/ICIRT.2016.7588774","url":null,"abstract":"Nowadays the trackside equipment layout of the traditional urban rail transit signal system mainly depends on the personal experience of the system designer. The accuracy and efficiency of the work cannot be guaranteed, relying more on the field test in the future. This paper focuses on this problem existing in the design work of signal system, based on the completeness and compatibility of the signal system design, establishes a signal simulation model of Hefei rail transit line 1, and the signal system inspection rule base of design, the line 1 signal system layout verification, find out the potential of the design scheme of design factors to the safety of driving, ensure quality of the design of signal system, improve the operation of the system safety reliability and availability.","PeriodicalId":427580,"journal":{"name":"2016 IEEE International Conference on Intelligent Rail Transportation (ICIRT)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123657519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Hamid, G. Nicholson, H. Douglas, N. Zhao, C. Roberts
{"title":"Investigation into train positioning systems for saving energy with optimised train trajectories","authors":"H. Hamid, G. Nicholson, H. Douglas, N. Zhao, C. Roberts","doi":"10.1109/ICIRT.2016.7588769","DOIUrl":"https://doi.org/10.1109/ICIRT.2016.7588769","url":null,"abstract":"One approach to reduce energy consumption in railway systems is to implement optimised train trajectories. These are speed profiles that reduce energy consumption without foregoing customer comfort or running times. This is achieved by avoiding unnecessary braking and running at reduced speed whilst maintaining planned arrival times. An optimised train trajectory can be realised using a driver advisory system (DAS). The optimal train trajectory approach needs a variety of input data, such as the train's position, speed, direction, gradient, maximum speed, dwell time, and station locations. Many studies assume the availability of a very accurate train position in real time. However, providing and using high precision positioning data is not always the most cost-effective solution. The aim of this research is to investigate the use of appropriate positioning systems, with regard to their performance and cost specifications, with optimised trajectories. This paper first presents a single train trajectory optimisation to minimise overall energy consumption. It then explores how errors in train position data affect the total consumed energy, with regard to the tractive force due to gradient when following the optimised trajectory. A genetic algorithm is used to optimise the train speed profile. The results from simulation indicate that a basic GPS system for specifying train position is sufficient to save energy via an optimised train trajectory. The authors investigate the effect of error in positioning data, to guarantee the reliability of employing the optimised solution for saving energy whilst maintaining an acceptable journey time.","PeriodicalId":427580,"journal":{"name":"2016 IEEE International Conference on Intelligent Rail Transportation (ICIRT)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130233280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A train regulation approach for energy-saving: A case study for Beijing metro line","authors":"S. Su, T. Tang, J. Xun, F. Cao, Yihui Wang","doi":"10.1109/ICIRT.2016.7588773","DOIUrl":"https://doi.org/10.1109/ICIRT.2016.7588773","url":null,"abstract":"The passenger flow at stations are stochastic and even a good timetable will cannot cope with its stochastic variation. To efficiently use the timetable, this paper proposes a regulation approach for train operation. For the scenario with a small passenger flow, the dwell time will be shortened according to the number of boarding and alighting passengers. The reduced dwell time will be added to the running time for the next interval such that the energy consumption of this interval will be reduced with a longer running time which implies a lower running grade in urban rail. Starting with the investigation of the invalid dwell time, the running time of different running grades is determined by assigning the buffer time to intervals to minimize the total energy consumption of a cycle time. Based on the operational data, a case study for Beijing Yizhuang line is presented to illustrate the effectiveness of the proposed approach.","PeriodicalId":427580,"journal":{"name":"2016 IEEE International Conference on Intelligent Rail Transportation (ICIRT)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127895644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Study on the effect of compensation capacitors on broken rail detection in audiofrequency track circuits","authors":"Xinsheng Zhou, Zhixin Wang, Zhiming Liu","doi":"10.1109/ICIRT.2016.7588746","DOIUrl":"https://doi.org/10.1109/ICIRT.2016.7588746","url":null,"abstract":"In order to reduce the voltage drop on the track between the sending end and the receiving end, the track are usually capacitively compensated with shunt capacitors in audiofrequency track circuits (TCs). The impact of track compensation on broken rail detection, which is a key feature of TCs to ensure operation safety, should be considered accordingly. In this paper, the model of track circuits with compensation capacitors (CCs) in rail broken state is established and comparison between compensated and uncompensated track circuits is presented.","PeriodicalId":427580,"journal":{"name":"2016 IEEE International Conference on Intelligent Rail Transportation (ICIRT)","volume":"11 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117003742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Z. Tian, P. Weston, S. Hillmansen, C. Roberts, N. Zhao
{"title":"System energy optimisation of metro-transit system using Monte Carlo Algorithm","authors":"Z. Tian, P. Weston, S. Hillmansen, C. Roberts, N. Zhao","doi":"10.1109/ICIRT.2016.7588768","DOIUrl":"https://doi.org/10.1109/ICIRT.2016.7588768","url":null,"abstract":"With rising concerns on energy and environment, the energy-efficient operation techniques in railway systems are paid more attention in recent years. The metro-transit system has some distinguishing features like short headway and a high number of stations with short interstation distance, which makes effectively using regenerative energy becoming more significant in the energy-saving study. This paper illustrates a system energy optimisation approach to reduce global substation energy consumption, using Monte Carlo Simulation. The conception of substation and regenerative energy estimation is proposed in the optimisation. A railway power network simulation is utilised to validate the energy-saving performance in Beijing Yizhuang Subway Line. After applying efficient-driving strategies remaining current timetable, the substation energy can be reduced by 29.9% compared with current operation. By slightly changing the journey time of each interstation, the substation energy consumption can be reduced by additional 13.8% due to an increasing usage of regenerative braking energy.","PeriodicalId":427580,"journal":{"name":"2016 IEEE International Conference on Intelligent Rail Transportation (ICIRT)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132513317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Low power and low cost sensor for train velocity estimation","authors":"Max Spindler, Denis Stein, M. Lauer","doi":"10.1109/ICIRT.2016.7588742","DOIUrl":"https://doi.org/10.1109/ICIRT.2016.7588742","url":null,"abstract":"Nowadays railway vehicle speed sensors suffer from insufficient measurement accuracy. E. g. the Doppler radar is prone to adverse weather conditions while wheel speed sensors are not sufficiently robust against wheel slip and wheel wear. However, since velocity sensors are safety relevant components, it becomes clear that conventional sensors are not able to cover all the requirements for an everyday use. To overcome these deficiencies, we introduce a new train speed sensor based on an electromagnetic measurement principle. It does not require physical contact to the surface. Therefore, it does not suffer from slip or wheel wear. Furthermore, it works reliably under various weather conditions so that it offers high availability. We present the technical basis of the sensor and the algorithm for speed estimation based on the raw sensory data. We show results from tests on a test bench and tests on a railway vehicle which was operated on a test track. We compare the sensor results quantitatively with a high accuracy GNSS receiver and a laser tachymeter.","PeriodicalId":427580,"journal":{"name":"2016 IEEE International Conference on Intelligent Rail Transportation (ICIRT)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132568635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Naghiyev, S. Sharples, B. Ryan, A. Coplestone, M. Carey
{"title":"Real world verbal protocol data analysis of European Rail Traffic Management System train driving and conventional train driving","authors":"A. Naghiyev, S. Sharples, B. Ryan, A. Coplestone, M. Carey","doi":"10.1109/ICIRT.2016.7588731","DOIUrl":"https://doi.org/10.1109/ICIRT.2016.7588731","url":null,"abstract":"The European Train Control System (ETCS) as part of the ERTMS (European Rail Traffic Management System) is a train automation and control system, which has been introduced into the UK rail network, triggering a need to understand its impact on the train driving task and train driver behaviour. In particular, an industry requirement for Human Factors (HF) research and the necessity to understand the effect ERTMS has on drivers' cognitive strategies and demands. A real world exploratory eye-tracking study was conducted with both conventional and ERTMS drivers on their normal timetabled routes. In addition to the eye movement measures, a mixture of concurrent and retrospective verbal protocol data was collected and analysed using thematic analysis. The verbal dataset provides explanations for any differences in visual behaviour between ERTMS drivers and conventional drivers. The findings provide some deeper qualitative analysis to the reason behind the shift of typical visual attentional strategy from monitoring outside on the tracks to speed information inside the cab.","PeriodicalId":427580,"journal":{"name":"2016 IEEE International Conference on Intelligent Rail Transportation (ICIRT)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134023637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Supervision and rescheduling of a mixed CBTC traffic on a suburban railway line","authors":"Juliette Pochet, Sylvain Baro, G. Sandou","doi":"10.1109/ICIRT.2016.7588547","DOIUrl":"https://doi.org/10.1109/ICIRT.2016.7588547","url":null,"abstract":"Railway companies need to achieve higher capacities on existing infrastructures such as high density suburban mainlines. Communication based train control (CBTC) systems have been widely deployed on dedicated subway lines. However, deployment on shared rail infrastructure, where CBTC and non-CBTC trains run, leads to a mixed positioning and controlling system with different precision levels and restrictions. New performance and complexity issues are to arise. In this paper, a method for rescheduling adapted to a CBTC system running in a mixed traffic, is introduced. The proposed method is based on a model predictive control (MPC) approach. In each step, a genetic algorithm with new mutation mechanisms solves the problem to optimize the cost function. It determines the dwell times and running times of CBTC trains, taking into account the non-CBTC trains planning and fixed-block localization. In addition, reordering can be allowed by modifying the problem constraints. The work is supported by a simulation tool developed by SNCF and adapted to mixed traffic study. The approach is illustrated with a case study based on a part of an East/West line in the Paris region network, proving the ability of the method to find good feasible solutions when delays occur in traffic.","PeriodicalId":427580,"journal":{"name":"2016 IEEE International Conference on Intelligent Rail Transportation (ICIRT)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124066299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}