• The Transactions of The Korean Institute of Electrical Engineers
• /
• v.67 no.1
• /
• pp.61-67
• /
• 2018

Automatic Train Stop (ATS) is a device that automatically stops or decelerates a train when the train exceeds the permitted speed limits or violates the signal regulations. The railway signaling system has been evolved to an automatic train control system (ATC), and is being developed into Distance-to-Go and Communication Based on Train Control (CBTC). In spite of that, the ATS system is currently being operated in Seoul Metro (line 1 and 2) and most of railway lines in Korea as well as overseas. In this study, we presents the technical methodology to prevent human errors in order to secure the safety in operation of the ATS system.

• Proceedings of the KSR Conference
• /
• 1998.11a
• /
• pp.210-218
• /
• 1998

The ATO(Automatic Train Operation) System is used for train operation instead of drivers. It is interfaced with TCMS(Train Control and Monitoring System) and ATC/TWC system in the train and wayside facilities. In this paper describes configuration of ATO, specification of ATO hardware, construction of ATO software and the algorithm fur automatic train speed regulation in the carborn ATO system. ATO Application Software is consist of ART, SPR, REG, SRV and PSM tasks. ART task is main control part of the ATO that determine ATO control, ATO mode, state transition. SPR determine speed reference according to train motion status, track data, train data and restricted train speed. REG task regulated train speed form the starting of one station to the precision stop at the other station under the result of ART and SPR tasks. In this paper, a algorithm for the train speed regulation while running is described.

• Journal of The Korean Society For Urban Railway
• /
• v.6 no.4
• /
• pp.363-372
• /
• 2018

Simulator is used to verifying the function and performance of train control system before verifying with actual train. In this case, it is important that the simulation result should be coincide with the result with actual train. In this paper, the process of the development of automatic train operation (ATO) is described. ATO is in charge of automatic train control such as speed regulation and precision stop control. Identical interfaces from the ATO to the actual train was made in the simulator. Therefore ATO communicates to the simulator in the same way to the actual train. Futhermore, the train dynamic properties was measured by experiments and these were applied to the train model. Hence the response of the train in the simulator to the acceleration command is similar to that of the actual train. The simulation result of precision stop control is compared with the result in the actual train test to show the fidelity of the train model derived in the study and the superiority of this simulator.

• Proceedings of the KSR Conference
• /
• 2011.05a
• /
• pp.1618-1628
• /
• 2011

The Train Diagnostic and Control System(TDCS) has been equipped on the modern Metro Vehicle, Locomotive and High Speed Train. The main purpose of this system is to support the identification of train status by real-time, the fast action against such failure events during revenue service and the fast convenient maintenance processes. Some of newest TCMS, a kind of control and monitoring system, has participated in the main control functions such as pantograph up and down, powering and braking command and so on. But these kind of control functions of the high speed train which has the operating speed over 300km/h are conducted by the train electrical logic circuits. The KTX-I and KTX-II - the local high speed train, are the typical example. The next generation TDCS for the ongoing project of distributed high speed train(HEMU) is designing with the target to increase main train control functions, to increase the reliability/avalibility and to increase the convenient driving. This paper introduces the overall configurations and functions of the new generation TDCS.

• Proceedings of the KSR Conference
• /
• 2009.05a
• /
• pp.1164-1171
• /
• 2009

It has been 5 years since KTX high speed train was operated by KORAIL in Korea in April 2004. As for KTX train, France TGV was optimally renovated to make it, considering Korean geographical and environmental features. The research and development about KTX make it possible that train's exterior device design has the original design capability but, KTX train control & diagnosis design remains in the level of imitation. In order to analyze KTX train's diagnosis & control data, there are a collection method, using VME analysis device and method of analyzing control data structure and the operating and design capability about train control & diagnosis device should be secured. As the various high speed trains are operated in tracks, high speed train's safety driving and reduction of expense are necessary, by preparing in advance various train diagnosis & control which is indispensable to train operator. With the simplified train diagnosis & control design, Korean type high speed train's manufacture capability and operating capability should be improved and Korea's international status as a nation of operating high speed train should be established.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.16 no.9
• /
• pp.6274-6281
• /
• 2015

Radio-based train control system has driving headway shortening effect by real-time train interval control using two-way radio communication between onboard and wayside systems, and reduces facility investment because it does not require any track-circuit. Automatic train protection(ATP), the most significant part of the radio-based train control system, makes sure a safe distance between preceding and following trains, based on real-time train location tracing. In this paper, we propose the overall ATP train interval control algorithm to control the safe interval between trains, and preprocessing-based speed profile calculation algorithm to improve the processing speed of the ATP. The proposed speed profile calculation algorithm calculates the permanent speed limit for track and train in advance and uses as the most restrictive speed profile. If the temporary speed limit is generated for a particular track section, it reflects the temporary speed limit to pre-calculated speed profile and improves calculation performance by updating the speed profile for the corresponding track section. To evaluate the performance of the proposed speed profile calculation algorithm, we analyze the proposed algorithm with O-notation and we can find that it is possible to improve the time complexity than the existing one. To verify the proposed ATP train interval control algorithm, we build the train interval control simulator. The experimental results show the safe train interval control is carried out in a variety of operating conditions.

• Proceedings of the KIEE Conference
• /
• 2005.10b
• /
• pp.481-483
• /
• 2005

There is change of signal control system for train control worldwide current. This is train control system that use radio communication and step practical use Tuesday. Research for diversified application, examination and enforcement is achieved in internal railroad industry by this. Therefore, do examination of universal train radio control way for internal application. Studied train control way that use suitable radio communication to internal railroad.

• Journal of Electrical Engineering and Technology
• /
• v.4 no.1
• /
• pp.87-92
• /
• 2009

Many critical control systems are developed using formal methods. When software applied to such systems is developed, the employment of formal methods in the software requirements specification and verification will provide increased assurance for such applications. Earlier errors of overlooked requirement specification can be detected using the formal specification method. Also, the testing and full verification to examine all reachable states using model checking to undertake formal verification are able to be completed. In this paper, we proposed an eclectic approach to incorporate Z(Zed) formal language and 'Statemate MAGNUM', formal method tools using Statechart. Also we applied the proposed method to train control systems for the formal requirement specification and analyzed the specification results.

• Journal of Korea Entertainment Industry Association
• /
• v.5 no.1
• /
• pp.122-126
• /
• 2011

In this paper, for the purpose of improving the future domestic train control systems and securing interoperability according to the global development trends of train control systems, we present the test results of interoperability between wayside train control system installed in existed line, and the onboard train control system. Due to the safety-critical characteristics of train systems, the site test in the section where the wayside equipment is installed, leads to a danger against safety. Therefore, by way of constructing a simulation environment of train control systems, we confirm the T/R data systems of the equipment for interoperability and test the interoperability by applying these systems to onboard equipment.

• Proceedings of the KSR Conference
• /
• 1999.05a
• /
• pp.103-109
• /
• 1999

The object of the study is to propose the control method of FSB(full service brake) for the standard EMU. Recently, the variable control function was applied to train by introducing the TCMS. When the vehicle in the train fails, the emergency brake of the train should be automatically operated. In case of VVVF EMU operated by the TCMS, the FSB is applied to the train for safety instead of emergency brake. When the FSB is applied to train regardless of its weight and the numbers, the train safety operation may not be obstained. Therefore, the FSB force which considers its weight and numbers should be applied to the train. This paper describes the blending brake control for standard EMU. The control algorithm of the FSB is proposed and its simulation was carried out by using MATLAB.