The Proceedings of the Transportation and Logistics Conference
Online ISSN : 2424-3175
2018.27
Displaying 101-150 of 215 articles from this issue
  • Akiko KONO, [in Japanese]
    Session ID: 1510
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Since resilient sleepers were applied to the railway lines, solid rubber has been mainly used for under sleeper pad (USP). Recently, cellular rubber is newly used for the material of USP. The authors focused on dynamic viscoelasticity of the USP and evaluated effect of that on track dynamic response and ballast settlements by using numerical simulations. The simulation results show that the viscoelasticity of USP doesn’t effect on reducing the sleeper bottom loading but ballast vibration acceleration. Then those results show that the ballast settlement decrease accompanied with the increasing of the viscoelasticity of USP.
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  • Minoru SUZUKI, Daigo SATO, Shogo MAMADA
    Session ID: 1511
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Since the under sleeper pad (USP) for the ballasted track is expected to have an effect of suppressing track irregularity, introduction of the UPS tends to increase in order to save labor for the track maintenance in the future. In Japan, the USP has been used since the 1980's, many of which are made of non-foamed rubber and so far it has not been enough knowledge on the compression characteristics of the USP made of foamed rubber. Therefore, the authors evaluated the compression characteristics of the USP by using a test method taking the interaction with the ballast into consideration.
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  • Takumi Kurihara, Daisuke Kozu, Takaki Kubo
    Session ID: 1512
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    More than 50 years have elapsed since PC laying on the PC, so there is concern about the aging of the sleepers. In JR East, TC type low maintenance track is laid in the main line section of the metropolitan area, lower line PC sleepers are laid down on the local line, and along with the reduction of maintenance, we are promoting renewal of the facilities of the sleeper. From now on, in the 100 km area of Tokyo excluding these covered line sections and regional trunk lines, aged exchanges of PC sleepers are anticipated, and in the business line of "TC type PC sleeper with under sleeper pad" developed for the purpose of maintenance reduction and orbit enhancement Report on the outline and results of test laying.
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  • Kodai MATSUOKA, Munemasa TOKUNAGA, Mizuki TSUNEMOTO, Kyoko IKURA
    Session ID: 1513
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    In order to clarify the relation between vibrations on the railway bridge and the poles built on the bridge during train passages, this study conducted a field test and the numerical analysis focusing on the pole built at concrete girder in a high-speed railway. As results, standard steel poles with the height of 10m built on the girder edge excited in the rail direction during train passages. And the resonance occurs at the train speed of 240 km/h. In addition, the resonance phenomenon had little effect on each other, bridge and pole, when frequencies of the pole and the bridge are different. Finally, this study performs the numerical analysis using the pole – bridge integral model. The calculated responses are in good agreement with the measured values.
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  • Michiaki OYADO
    Session ID: 1514
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Periodical inspection is fundamental and essential in order to confirm the safety performance of the existing infrastructure. On the other hand, it will become harder to mobilize the resources (consumption of labor or time) required for the inspection because of, for example, low birthrate and aging population. In order to keep the quality of the inspection at the higher level, resources for the inspection should be continuously procured with explaining its necessity; otherwise the efficiency of the inspection should be improved for the sake of resource reduction, referring to the present situation of spending. In this paper, trial calculation of resource mobilization for the inspection of infrastructure conducted using the existing public-released data as the first step to keep the quality of the inspection.
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  • Koya YAMADA, Kazuhisa ABE, Kazuhiro KORO, Masaru FURUTA, Michiko SUEHA ...
    Session ID: 1516
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    A three-dimensional analysis method is developed for subway tunnel/soil dynamic interaction problems. Reduction of numerical effort is achieved by applying Floquet transform and Fourier expansion in the track direction to the railway track and tunnel/soil subsystems. This formulation needs the finite element discretization only in the tunnel cross section. The infinite soil domain is represented by an impedance matrix derived from analytical solution. Through numerical analyses of vibration reaction due to a stationary harmonic loading, the influence of track structures on the vibration reduction is discussed.
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  • Shihpin LIN, Yu WANG, Yoshihiro SUDA
    Session ID: 2101
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    It is important for LRT and tram system to improve curving performance because tram vehicle must run in a sharp curve which arises in an intersection. This paper studies a traction control that the simple structure’s bogie applied IRW (Independent Rotating Wheel) can run in a sharp curve with good curving performance.
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  • Takashi KOJIMA, Akihito KAZATO, Nobuyuki WATANABE, Kohei MIYAHARA
    Session ID: 2102
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    This paper describes the development of a bogie equipped with a new type of tilt mechanism for providing the tilt up to 5 degrees which is the maximum tilt angle of the conventional tilt bolster type with a simpler structure than the tilt bolster type. The tilt mechanism proposed is worked in such a manner as to give tilting forces to the carbody by adding torsional torque to the torsion bar of the anti-rolling device. The rotary actuator, which is inserted between the torsion bar and the arm in series, generates the torsional torque. The arms and the vertical links transmit the torque to the carbody. A bench test for simulating running on a curve and carbody tilting was conducted. The results demonstrate that it is possible to tilt the carbody with high responsiveness according to the target tilt pattern up to 5 degrees.
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  • Kohei HARADA, Yasutaka MAKI, Kotaro ISHIGURI, Masahiro OKUMURA, Shinic ...
    Session ID: 2103
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    The train positioning system by means of the ATS beacon used in the pendulum car requires sorting out the ATS beacon and updating the in-vehicle database according to the relocation of ATS beacons. Under the method proposed, track curvature data calculated by means of dividing the yaw rate of the carbody by the running speed are held as the on-board database, and the position of the train is detected based on the comparison with the track curvature data during running. In this case, applying a spatial filter improves detection accuracy and reduces database updating frequency. This paper presents the outline of the system and the detection accuracy.
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  • Takashi KOJIMA, Yasuhiro UMEHARA, Shogo KAMOSHITA, Takatoshi HONDO, Hi ...
    Session ID: 2104
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    This paper presents an active steering system to ensure both the curving performance and the high-speed running stability of the vehicle. The proposed system is so configured as to detect the curves by the gyroscopes mounted on the vehicle and to generate a yaw moment between the carbody and the bogie with the hydraulic actuators to replace the existing yaw dampers. This configuration enables the reduction of the wheel/rail lateral force with a small additional mounting space without requiring complicated mechanical links in the bogies. The actuators also work as passive yaw dampers during the high-speed running to ensure the running stability. A test vehicle equipped with the developed steering system was made to run on a test track including a curve with a radius of 160 m. The result shows that the active steering reduced the lateral force of the outer wheel of the first axle in the circular curve by about 60 % on average as compared with the inactive steering.
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  • Hisako NEGISHI, Hiroyuki YAMADA, Ken IWANAMI, Ryohei SHIMAMUNE, Daisuk ...
    Session ID: 2105
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    We developed an active bogie-steering truck with the aim of achieving compatibility between high speed running stability required in the Shinkansen section and curving performance required in the conventional line section. The truck for throughoperation between Shinkansen and conventional line, equipped with two yaw dampers in parallel on one side, is the basis for considering. The developed active bogie-steering truck is composed of a control device, a steering actuator, and a damping force switching yaw damper. In the running test, we confirmed lateral force reduction at a head end outer rail wheel by active bogiesteering truck.
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  • Kosuke Hara, Masataka Hidai, Kenjiro Goda, Kazuo Kamekawa, Takao Watan ...
    Session ID: 2106
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    This paper describes static tests and vehicle dynamics simulation of Class 800/801 trains for Intercity Express Programme in the United Kingdom(UK). For Class 800/801, which operates all over the UK at maximum speed of 200km/h, it is required to carry out static tests and validate simulation model in accordance with UK standard and European standard to ensure the safe performance. In this paper, it is shown that wheel unloading test and sway test results complied with the standards, and simulation models for Class 800/801 trains were verified to simulate test results quite well.
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  • Kohei MIYAHARA, Daiki SANNOMIYA, Yoshiki SUGAHARA, Chizuru NAKAGAWA, T ...
    Session ID: 2107
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    The purpose of this study is to research how the increase and decrease of roll vibration affect the ride comfort of passengers. Subjects experienced several kinds of vibrations on two types of vehicles and were asked how comfortable it was in each test. In the experiments, the 6-axis motion in RTRI was used. In Investigation A, subjects were exposed to the roll vibrations of many different levels and they were asked if they could identify the differences. In Investigation B, they were exposed to the vibrations of the vehicles with the vibration control system and were asked if they could recognize the system was working. The data was analyzed in the statistical method, and it was found that the evaluation on the roll vibration is different depending on the types of vehicles.
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  • Takashi ISOYAMA, Takayoshi KAMADA, Koji SAITO, Naoki SHIRAKI, Michiko ...
    Session ID: 2108
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    High speed railway has a large role as transportation between cities. However, there is a problem that high frequency vibration increases under high speed running. It causes a bad influence on the ride comfort. In the previous study, a model reproducing vibration characteristics of the seat for high speed railway was constructed. Since the reproducibility of the vibration characteristics is not high by using previous model, we aim to improve the previous model in this study. First, we investigated the vibration characteristics of the seat and compared with the simulation result. Second, we identified where the model needs improvement and change the structure. Finally, we compared the simulation results with the experimental ones again and verified the validity. In conclusion, in part of the model improved accuracy more than before.
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  • Tamami KAWASAKI, Takashi KYOTANI, Katsuaki TAN
    Session ID: 2109
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Unpleasant odors existing in a railway vehicle are sometime pointed out by railway customers. We focused air in an air conditioning system in a vehicle, and environmental factors, temperature, humidity, and fungal index of inside ducts, were monitored for about a year in this study. As the results, the extent of unpleasant odors judged by persons was highest in June, and fungal index was detected from early June and showed maximum in August. Therefore, it is suggested that fungi has started to grow from early in June in a duct of a vehicle, and it might be related to unpleasant odor inside a vehicle.
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  • Atsushi SHIMIZU, Yoshiki SUGAHARA, Mami MATSUMOTO
    Session ID: 2201
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    We use the technique that is called system identification by ARX model using the relationship between track irregularity and vertical vibration in the vertical semi-active vibration control vehicle with nonlinearity. It is confirmed that by using a filter that predicts vertical vibration from track irregularity, it is possible to estimate vertical vibration with accuracy that is practically acceptable in the frequency band of track irregularity. We also confirmed that vertical vibration can be estimated even if the prediction filter obtained in the local line section is applied to the track irregularity in the high speed line section.
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  • Yuichi HAYASHIDA, Hitoshi TSUNASHIMA, Masashi TAKIKAWA
    Session ID: 2202
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    For preventive maintenance of track, low-cost monitoring systems have been developed based on on-board sensing devices and applied for regional railway lines. However, it is difficult to deal with a large volume of automatically collected data. To enable efficient computational processing of collected data, diagnosing and predicting track conditions need to be automated. In this study, an algorithm for identifying the track conditions from car-body acceleration was constructed using machine learning techniques and verified in simulation study. In addition, we examined the possibility of diagnosing track conditions for an actual regional railway line. The field test results show that the track faults can be detected automatically by the proposed machine learning techniques.
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  • Tomoyuki ISHIKAWA, Yosuke TSUBOKAWA, Masashi MIWA, Atsushi SEKINO, Koi ...
    Session ID: 2203
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Nowadays, track structure is strengthen compared to the period when the relationship between dynamic track irregularity and static track irregularity has been defined. In this paper, to investigate the relationship is accorded with current track structure, we consider the relationship by comparing dynamic track irregularity distribution and static track irregularity distribution with track irregularity data measured in same year.
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  • Hirotaka MORI, Seigo OGATA, Yasuhiro SATO, Hitoshi TSUNASHIMA
    Session ID: 2204
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Condition monitoring of railway tracks is essential in ensuring the safety of railways. In-service vehicles equipped with sensors and GPS systems can act as probes to detect and analyze vehicle vibration. Such trains are known as probe vehicles. Probe vehicles may also dramatically change the current style of rail maintenance, thus contributing to the establishment of safer transport systems. The probe vehicle can change the current maintenance style to focus on locations regarded as essential maintenance areas, utilizing data acquired by high frequency monitoring of actual vibration together with positional information obtained by GPS. Monitoring based on information obtained by the probe vehicle may track detect faults at an early stage, thus contributing to the revitalization of local railways by making maintenance tasks more efficient. In this paper, we report on the results of railway track condition monitoring using in-service railway vehicles.
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  • Masako KAMIYAMA, Hirotaka SAKAI, Takuya KARATSU, Yasukuni NAGANUMA
    Session ID: 2205
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    This paper describes a method of statistically extracting seasonal variations from data sets of vertical track geometry measured at the same point for years. Track geometry changes seasonally at some fixed points although track geometry is generally considered to change monotonically because of daily train loads. The statistical time-series model for extracting a seasonal variation is developed and the parameters included in the model are estimated according to the maximum likelihood method.
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  • Susumu KAWASHUIMA, Yutaka WATANABE
    Session ID: 2206
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Maintenance of tracks needs a lot of manpower at night because of manual inspection for long distance railroad sections. Therefore unmanned inspection is expected for the maintenance. The authors of this paper apply the detection of three dimensional center of gravity (abbreviated to D3DCG) for detecting deformation on track to contribute toward such unmanned inspection. D3DCG detects a right location of the center of gravity of an inspection equipment placed on a rail car when the car run on no deformed tracks, whereas D3DCG miss-detects the location when the car pass on deformed tracks.
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  • Yasukuni NAGANUMA, Yusuke KURODA, Masaru MORIMOTO
    Session ID: 2207
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Compound irregularity management has been carried out to maintain running safety of railway vehicles, but it is hardly done on turnout sections. Recently, the importance of the cyclic cross-level irregularity management has been shown, but it is difficult to confirm the track quality right after maintenance work. Based on the above, we have devised a method to calculate compound irregularity and cyclic cross-level irregularity efficiently using a track geometry measuring trolley. Applying the polynomial approximation, the latest trend estimation method and the Hampel filter to the track geometry data showed that the transient response was reduced and these data processing methods contribute to efficient track management.
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  • Takatomo Akamatsu, Naoki Hidaka, Takashi Nakayama, Yuta Nishijima, Mas ...
    Session ID: 2208
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Railway track irregularity needs to be kept within satisfactory range through appropriate maintenance work. Therefore, we propose an effective scheduling method for obtaining an optimal railway track irregularity maintenance schedule by using MTS (MTT Scheduling system). In order to evaluate the method for the actual application of the system we apply field tests. By considering the results of the tests, we propose more effective method for applying the system to utilize our actual maintenance operations. Finally we discuss the future problems and possibilities for our method to contribute not only for planning MTT operation schedule but also for planning hand tie tamper work scheduling.
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  • Yuta Nishijima, Takatomo Akamatsu, Naoki Hidaka, Takashi Nakamaya, Mas ...
    Session ID: 2209
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    To deal with a highly accurate track maintenance plan and decreasing in the working population, development of various systems for preparing track maintenance plan has been advanced. One of them, The MTT planning support system. The MTT plan support system formulates track maintenance plan by predicting track irregularity and the maintenance improvement amount from past track inspection and maintenance results. However, depending on the track section, the accuracy of prediction of maintenance improvement amount was sometimes low. In this study, we examined improvement of prediction accuracy of maintenance improvement amount of the MTT plan support system, and tried to improve model for maintenance efficiency improvement.
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  • Seigo Ogata, Yasuhiro Sato
    Session ID: 2210
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    In order to prevent derailment accidents caused by gauge widening, which have occured in local railways, the authors developed a loading jig which could mesure the change of gauge when loading the lateral force between the rails. Simulating a defectiveness state of the fastening to the rail, a loading test was conducted using the jig. As a result, based on the relation between the load by the jig and the amount of the gauge widening, it is considered that we can estimate gauge widening at the time of passing of a train, and that we may judge the defectiveness of sleepers including rail fastening.
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  • Morimasa HAYASHIDA, Yasuhiro SATO, Toshihiro TAKEUCHI, Takeshi Mizuma
    Session ID: 2301
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Regarding independent safety assessments (ISA) in designing stage for railway signalling systems that are hi-technology and complicated such as CBTC, NTSEL proposed a standard structure of ISA report including viewpoint of reliability and others. Further, NTSEL is considering about relationship between ISA and international standards or standard conformity assessments. On the other hand, NTSEL has started to try STAMP that was proposed as a new safety assessment method focussing on interactions among components of the system and to review assessments for security of safety related communications. This paper reports these efforts above.
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  • Keita SAKEMI, Akimasa OKADA, Satoru KITAMURA, Takashi KUNIFUJI, Hideki ...
    Session ID: 2302
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Accidents at level crossings have big social impact. Therefore it’s very important to prevent them. Existing level crossing system safety is controlled by logic configured with traditional electrical relays and it has a history of high level of safety and reliability over several decades. Control logic implemented by means of such legacy mechanism includes deep tacit knowledge. Therefore, clarifying the implicit design philosophy is required. By conducting FRAM analysis for level crossing implementations, we have found out hidden design secrets and beautiful “pyramid” architecture in highly complex relay-based logic. In this paper, success and risk cause of this legacy system will be shown.
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  • Noriyuki SHINODA, Toshihiro TAKEUCHI, Daisuke YAMAGUCHI, Shoichiro WAT ...
    Session ID: 2303
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    The authors studied a train control system using satellite positioning and general purpose radio. However, in sections such as tunnels where satellite positioning is not possible, it is necessary to combine this with other methods of determining the absolute position. Therefore, we developed a method to accurately determine the absolute position of the vehicle by ascertaining the feature points by using LiDAR sensor. We conducted a test to grasp the characteristic structure along the railway line of the local railway, so we will report it.
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  • Keita ISHIKAWA, Yasunori MIYAMA, Upvinder Singh, Takeshi MIZUMA
    Session ID: 2304
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    In this research, using the analysis result of FMEA which is a conventional safety analysis method and AHP (Analytic Hierarchy Process) which is a hierarchical analysis method, four items indicated by the RAMS standard, "reliability (R)" " We propose a method to evaluate a total of 5 items including "availability (A)", "security (S)" and "security" from a comprehensive viewpoint In this paper, Consider the analysis method that also suggests the result.
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  • Yasunori Miyama, Keita ISHIKAWA, Takeshi MIZUMA, Upvinder SINGH
    Session ID: 2305
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    FMEA/FTA, which is a conventional evaluation method, can extract failure modes and abnormal phenomena, calculate probabilities of risk evaluation and abnormal events, and evaluate the safety of the system. Meanwhile, it is difficult to express concurrent faults and intrinsic faults, so we used state transition diagrams and ETAs to show temporal movement. In this research, we apply a guide word specific to STAMP, extract hazards generated by time axis, which was difficult to evaluate by conventional evaluation method only, and consider a series of flows when creating state transition diagram/ETA.
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  • Satoshi SEKINE
    Session ID: 2306
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    As a merit of the moving block control, the effect of shortening the headway is noticed, but it is also expected that it has an early recovery effect of train delay. We have reported a method for determining the order of priority based on driving prediction for competing trains. However, unpredictable delay may occur when a train is stopped at the station, in which case the running of other trains is obstructed and delay increases if the following train runs beyond the entry point and stops immediately after the preceding train. Therefore, we report on a method for avoiding causing the following train to obstruct other trains by deterring it from passing the entry point while the preceding train is stopped at the station.
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  • Hiroshi SHIDA, Akihiro TAMURA, Takashi NINOMIYA, Hiroshi TAKAHASHI
    Session ID: 2307
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    The track circuit is an important equipment for the railway operation to be safe and reliable. The maintenance of the currently used track circuit is based on the Time Based Maintenance (TBM). However, TBM has a problem to require excessive maintenance. Therefore we focus on the Condition Based Maintenance (CBM), which expects the reduced cost for maintaining the equipment. In this paper, we propose a maintenance method of the track circuit applying Machine Learning, which finds an appropriate time to perform the maintenance.
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  • Hiroyuki FUJITA, Takuya NOMURA, Jo TATSUMOTO, Aiko KUNISAKI
    Session ID: 2308
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Railway signalling facilities are widely introduced along railway lines for ensuring safe and stable operation of trains. Following that signalling facilities become highly functional and smaller sized, replacement of relay equipment with electronic equipment had been done a long time ago. On the other hand, it is often difficult to assess the deterioration tendency of electronic equipment, and proper setting of the replacement time of the introduced electronic equipment is a problem. In this paper, the authors conduct a survey of usage environments in order to extract and quantify stress factors on the wayside electronic equipment, and considered the method of lifetime evaluation. In addition, the authors showed an example of lifetime evaluation of the electronic equipment on railway track environment.
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  • Naoki HASHIMOTO, Masakazu SONOBE, Takashi KATO, Toru MURAKAMI
    Session ID: 2309
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Currently, we are engaged in research and development aiming at further speeding up the Shinkansen, but the current speed of the position correcting ground coil is up to 350 km / h. For that reason, a position correcting ground coil that can cope with further higher speed is required. Also, in winter, it is a problem that the ground coil is broken due to the impact of falling snow from the Shinkansen train traveling at high speed and it is expected that the breakage of the ground coil will increase with further speeding up. There is a strong demand for ground coil that are resistant to shocks. We will introduce solutions to these problems, test results by prototype and schedule until practical use.
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  • Daiki Shibahara, Yusuke Dohi, Ryosuke Nakamura, Fumitoshi Abe
    Session ID: 2310
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    The digital train radio in rural railway lines is configured to connect the central unit and each base station with an optical cable. For this reason, it is necessary to newly lay optical cables in the optical cable unlaying section. As a method not using optical cables, a method of transmitting information using existing metal cables is conceivable, but development of a modem capable of transmitting information of train radio with low latency is necessary. We developed a low latency type metal modem which can be used for digital train radio in rural railway lines this time. By using this developed product properly, it is expected to reduce the installation cost of optical cable.
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  • Ryo Takahashi, Makoto Hashimoto, Kota Minaminosono
    Session ID: 2401
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    JR East aims to reduce energy used in the railway business by 25%. This research aims to make effective use of regenerative electric power and reduction of electricity loss. Therefore, we conducted simulations on these. As a result, it was found that power consumption can be reduced by controlling voltage of substation.
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  • Kentarou Misawa, Katsuhiro Kaneko, Keiji Kawahara, Masayuki Kashima
    Session ID: 2402
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    In order to use unutilized regenerative power effectively, we installed an energy storage system in Yasu sectioning post in March, 2018. We analyzed the data about the ESS performance from March to August 2018, and it was found that the regulative charging energy was influenced by the season, while the total charge and discharge energy was not strongly. In this study, we report the data about the ESS performance and the issue on operating the ESS effectively.
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  • Shuntaro MATSUZAKI, Hiroshi TANAKA, Makoto HASHIMOTO, Takayuki KASHIWA
    Session ID: 2403
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    We have been studying ways to apply a flywheel energy storage system (FESS) to railway electricity distribution systems. And we tested and confirmed basic performances of FESS, such as reduction of peak demand and response to brief power outages. When many people are on a descending escalator, it regenerates electricity by releasing potential energy. In conventional escalators, regenerative power is consumed by resistors and is not recycled. Therefore, we confirmed through experiments that the above problem can be solved by the energy storage function of the FESS, which enables the escalator to operate even during a power outage. Furthermore, we estimated the amount of energy saved through recycling of regenerated electric power from the escalator.
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  • Yohei Sonoda, Nobumichi Tsutsui, Tetsujou Kozasa, Jun Nakano, Keiji Ka ...
    Session ID: 2404
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    There is concern about the unstable operation of the electrical machinery equipment due to the voltage drop of the distribution for the station and the great increase in cost and labor of the construction for power supply facility reinforcement due to the increase in the power consumption when the automatic platform gates are expanded in the future. In order to grasp these actual situations, we investigated the instantaneous electric power of slide door style automatic platform gate and wire style one during driving and other for the first time in our company. As a result, it was confirmed that the power consumption of both gates was relatively large. Therefore, when many automatic platform gates are installed, it is necessary to take countermeasures against voltage drop, such as review of locking method for the automatic platform gate and installation of the flywheel equipment for power compensation and so on.
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  • Takeyasu Nakazawa, Keiya Ooishi, Hideo Zama
    Session ID: 2405
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    A high-voltage bus No.2 was performed at Kawasaki substation for its improvement work. After beginning of use, an unnecessary 67G relay operation was occurred when a change of system was taken place. We discovered this phenomenon was happened because of unbalanced three-phase, and undertake interim and reform measure.
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  • Yasuhioro Muto
    Session ID: 2406
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    In large stations located at the Tokyo metropolitan area, high stray current has been observed at A-class (10 ohms and below) ground wires that are connected to high voltage switchgears. We investigated the cause of this phenomenon through data measurement and electrical analysis.
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  • Yoko TAKEUCHI, Tomoyuki OGAWA, Tatsuhito SAITO, Hiroaki MORIMOTO, Yusu ...
    Session ID: 2407
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Train operation power demand control based on decentralized control is proposed in order to reduce the power cost of train operation. To verify the train operation power demand control, we planned a verification running test using two substations and three trains. This paper shows the outline and result of the verification running test. The verification running test has confirmed the convergence and stability of the train operation power demand control. In particular, we considered the convergence ability of the train operation power demand control on the real railway line through an analysis of the variation in train delay time.
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  • Yuki NAKAMATA, Ryo TAKAGI
    Session ID: 2408
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Recent years have seen the introduction of stationary energy storage systems (SESSs) to mitigate the following problems commonly observed in DC traction power supply networks, namely: (1) the occasional loss of line receptivity for the regenerative trains when there is not enough load within the power supply network; and (2) the drop of line voltage when the traction load is too high. In the commonly the charge and discharge current of an SESS is controlled using I-V characteristic controller, which determines the current depending on the terminal voltage of the SESS. However, it is known to be very difficult to adjust the parameters of the I-V characteristics, such as the charge/discharge start voltage thresholds. To overcome this difficulty, the authors propose a new approach to the determination of the voltage parameters using the PI controllers. In this paper, the results of the evaluation by incorporating the proposed method into a multi-train power network simulator will be presented.
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  • Sohei Yamada, Yuki Chiba, Takao Shibai, Muneyuki Aoyagi
    Session ID: 2409
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    We are developing a wear prediction method for contact wires. It uses contact wire inspection data collected by commercial train. Currently, we make plans to replace the contact wire with the result of wear prediction using data collected by inspection train. However, the frequency of inspection trains run four times per year in each place, and there is a possibility to achieve more accurate prediction by using high frequency monitoring data of commercial train. In this paper, we show the advantage of using high frequency monitoring data from the point of data cleansing and prediction accuracy.
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  • Kenta NAGASAWA, Koutarou HAYASHI, Shin TAKEUCHI, Masayuki KASHIMA, Shi ...
    Session ID: 2410
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    The feeder is a facility provided to power from the substation via the electric line to the train. if the wire breaks, it takes time to restore, and there is a high possibility that it will be a transport obstacle, so prevention of disconnection is considered a priority from the viewpoint of securing stable transportation. Many of disconnection events that occurred in the past were events in which the contact resistance increased due to corrosion inside the compression pipe used for the connection and the stranded wire near the compression pipe was broken by Joule heat. In this paper, we report the development and verification results of the sensor which detects the temperature rise around the compression pipe before the wire breakage.
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  • Teruaki BABA, Hideyuki NAKAMURA, Masayuki OKAMURA, Nobuhito KATSUMURA
    Session ID: 2501
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    The shear strength in single-lap adhesive joints was evaluated using static shear test. In the experiment, the coefficient of variation were examined. As a result, it was found that the coefficient of variation of adhesive joints were lower than the one of butt welding.
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  • (When vibration suppressors are uniformly installed)
    Masafumi KAMIYA, Hiroyuki KIMURA
    Session ID: 2503
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Vibration suppressors are used to resolve the problem of collisions and entanglement to the hoistway equipment caused by the rope sway due to the resonance of the building and the elevator rope. Vibration suppressors have the effect of changing the natural frequency of the elevator rope and prevent resonance. The elevator rope is generally modeled using a string, and linear string vibration is well researched. However, the vibration of the string equipped with vibration suppressor encounters geometric nonlinearity, and hence, its characteristics have been studied under a few conditions. In this paper, theoretical solution to the free vibration of the rope is obtained, in the case where vibration suppressors are uniformly installed and the pulled position is (N-2i)L/2N from both ends of the rope. Where L is rope length, N and i (i < N / 2 ) are integer. The natural frequency is 2N/(N+1) times the original natural frequency. Further, finite difference analysis of the rope vibration with vibration suppressor is also performed to obtain the frequency response curves. Resonance frequencies obtained by the finite difference analyses are in good agreement with the natural frequencies for the free vibration.
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  • Eiichi SAITO, Daisuke NAKAZAWA, Takahide HIRAI, Seiji WATANABE
    Session ID: 2504
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    Recently, vibration suppression of the elevator rope sway motion due to a strong wind or an earthquake is more important for the long-travel elevator in high-rise buildings. However, it is difficult to suppress the rope sway if a vibration-suppression device such as a damper is mounted near the rope end termination. Against this background, the paper proposes passive vibration control of elevator rope using negative stiffness and damper. The negative stiffness contributes to improve vibration suppression performance of the damper even if vibration-suppression device is mounted near the rope end termination. It also presents the design of passive parameters to realize the desired damping ratio of string system. The validity of the proposed method is confirmed by the experiments.
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  • Ayaka FUJII, Seiji WATANABE, Kazuhiro KYUE
    Session ID: 2505
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    The 2:1 roping elevator system shows complicated vibration behavior under a disturbance from the traction machine, because the disturbance does not only cause the vertical vibration to the car, but also induces the rotational vibration against the car's suspension sheave. To evaluate the relation between the sheave's rotational vibration and the car vertical vibration, an analytical model is introduced for the 2:1 roping elevator system. The eigen mode analysis indicates that the amplitude of rotational vibration mode against the car suspension sheave, which induces the car vertical vibration, increases more when the sheave is closer to the traction machine at the top floor. The model also reveals that the higher ordered mode of the sheave's rotational vibration in high-rise buildings interferes with the target rotational vibration mode, so that the mode coupling contributes to reducing the car vibration.
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  • Kohei TOKORODANI, Masafumi HASHIMOTO, Kazuhiko TAKAHASHI
    Session ID: 2506
    Published: 2018
    Released on J-STAGE: June 25, 2019
    CONFERENCE PROCEEDINGS FREE ACCESS
    This paper presents a method for generating a 3D point-cloud map using multilayer laser scanner mounted on twowheeled vehicle. The vehicle identifies its own 3D pose (position and attitude) in a laser-scan period using the normaldistributions transform (NDT) scan-matching method. The vehicle’s pose is updated in a period shorter than the laserscan period using its attitude and angular velocity measured by an inertia measurement unit (IMU). The pose estimation is based on Kalman filter under the assumption that the vehicle moves at nearly constant translational and angular velocities. The vehicle’s pose is further estimated in a period shorter than measurement period of the IMU using a linear interpolation method. The estimated poses of the vehicle are applied to distortion correction of laser-scan data, and a point-cloud map is generated based on the corrected laser-scan data. Experimental results of mapping a road environment show the performance of the proposed method.
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