Analysis of the braking system of the Korean High-Speed Train using real-time simulations

Kang, Chul-Goo

doi:10.1007/bf03027654

Cited by 26 publications

(9 citation statements)

References 8 publications

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“…An approach combining signal processing and information enhancement is proposed in He et al (2013) for diagnosis of train bearings. In Kang (2007), a hardware-in-the-loop system is built to simulate the dynamics of a braking system of a HST. A modelling framework of magnetic braking systems is proposed in Galardi et al (2015) to test efficiency.…”

Section: The Braking System Of a Hstmentioning

confidence: 99%

A SVM framework for fault detection of the braking system in a high speed train

Liu

Zio

2017

Mechanical Systems and Signal Processing

103

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In April 2015, the number of operating High Speed Trains (HSTs) in the world has reached 3603. An efficient, effective and very reliable braking system is evidently very critical for trains running at a speed around 300 km/h. Failure of a highly reliable braking system is a rare event and, consequently, informative recorded data on fault conditions are scarce. This renders the fault detection problem a classification problem with highly unbalanced data. In this paper, a Support Vector Machine (SVM) framework, including feature selection, feature vector selection, model construction and decision boundary optimization, is proposed for tackling this problem. Feature vector selection can largely reduce the data size and, thus, the computational burden. The constructed model is a modified version of the least square SVM, in which a higher cost is assigned to the error of classification of faulty conditions than the error of classification of normal conditions. The proposed framework is successfully validated on a number of public unbalanced datasets. Then, it is applied for the fault detection of braking systems in HST: in comparison with several SVM approaches for unbalanced datasets, the proposed framework gives better results.

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Section: The Braking System Of a Hstmentioning

confidence: 99%

A SVM framework for fault detection of the braking system in a high speed train

Liu

Zio

2017

Mechanical Systems and Signal Processing

103

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“…In [7], the software TrainDy was presented; it was developed to reliably evaluate the longitudinal force distribution along a train during different operations. In [8], Kang described a Hardware In the Loop system for the Magnetic Braking Systems of the Korean high-speed trains and analysed the characteristics of the braking systems via Real Time simulations. In [9], many interrelationships between various factors and types of braking techniques were analysed.…”

Section: Introductionmentioning

confidence: 99%

Development of efficient models of Magnetic Braking Systems of railway vehicles

Galardi

Meli

Nocciolini

et al. 2015

International Journal of Rail Transportation

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In modern railway vehicles, the use of Magnetic Braking Systems is continuously increasing, because they are characterized by high braking performances and low energy consumptions. Hence, the study and the accurate modelling of Magnetic Braking Systems is a very important issue, because they significantly affect the dynamics of vehicle and electrical supply circuit. Usually, the performances of Magnetic Braking Systems are evaluated on test-rigs in order to reduce times and costs of testing phases. For this reason, the authors focus on the development of a complete 3D model of Magnetic Brake System test-rig (built in COMSOL), including all the electromagnetic, circuital and mechanical parts. These parts are often studied separately in the literature; however, a combined analysis is crucial to correctly describe the behaviour of the whole system. The proposed model is highly modular (to describe different Magnetic Brake System test-rig layouts characterized by a different number of magnetic polar expansions) and aims at obtaining a compromise between accuracy and numerical efficiency. Subsequently, a second simplified lumped parameter model derived from the complete one and built in MATLAB is developed, to further reduce the computational load without decreasing the results accuracy. In this work, both the models have been developed and validated in collaboration Ferrovie dello Stato and compared with other simplified models present in the literature.

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“…Twist locks are provided to hold the containers safely and rigidly on the platform of the vehicle or on the base of trailer. The twist lock locations on the platform, the load pattern inside the containers, load intensity, location of centre of gravity, the wheel base, self-weight of the platform, axle load distribution, approach and departure angles, ramp angle of the vehicle, trailer length, front & rear overhangs, vehicle width or height form the most important deign constraints of the chassis mounted platform [5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Development and Validation of Chassis Mounted Platform Design for Heavy Vehicles

Deulgaonkar¹,

Matani²

2014

Int. J. Vehicle Structures and Systems

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Hand calculations, finite element (FE) analysis and experimental validation of chassis mounted platform design for defence and commercial off-road vehicles have been attempted in this work. The work was commenced with the thorough study of platform configuration, loading pattern, platform mount location & configuration on the vehicle chassis and relevant vehicle characteristics. Calculation of section modulus, shear force and bending moment of various structural members under specified loading has been carried out before proceeding with the FE modeling and analysis of platform. FE model of the chassis mounted platform has been made using shell elements and the boundary conditions have been imposed based on the loading pattern with an assumption of rigid vehicle chassis. Static and gradient analyses of the platform have been carried out for full scale and reduced scale prototype FE models. Experimental strain measurement at critical locations under different static and gradient loads has been carried out for design validation of chassis mounted platform using the scaled prototype. Close correlation has been found between the experimental stress values and FE stress analysis results for static and gradient load conditions. From the entire load tests conducted, it is observed that the strain values in rear portion are less as compared with those in front and mid portions of the platform in-spite of the rear overhang provision.

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Analysis of the braking system of the Korean High-Speed Train using real-time simulations

Cited by 26 publications

References 8 publications

A SVM framework for fault detection of the braking system in a high speed train

A SVM framework for fault detection of the braking system in a high speed train

Development of efficient models of Magnetic Braking Systems of railway vehicles

Development and Validation of Chassis Mounted Platform Design for Heavy Vehicles

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