scholarly journals A Study on the Measuring System of Contact Force of Pantograph for the High-Speed Train

2012 ◽  
Vol 6 (1) ◽  
pp. 140-148 ◽  
Author(s):  
Jin-Sung PAIK ◽  
Chan-Kyoung PARK ◽  
Yong-Guk KIM ◽  
Ki-Hwan KIM
Keyword(s):  
Contact Force ◽  
High Speed ◽  
Measuring System ◽  
High Speed Train

A Study on Speed Elevation Possibility at the Connection between High Speed Lines and Conventional Lines with Korean High Speed Train

2006 ◽  
Vol 326-328 ◽  
pp. 635-638 ◽  
Author(s):  
Young Sam Ham ◽  
Jai Sung Hong
Keyword(s):  
Contact Force ◽  
High Speed ◽  
Integrated System ◽  
Communication Line ◽  
Mass Transportation ◽  
Test Results ◽  
High Speed Train ◽  
Safety Standards ◽  
Derailment Coefficient ◽  
Train Speed

Railways are a mass transportation system with high safety and punctuality. These strengths have been well proved by tests and evaluations. Railways are an integrated system with cars, power, signal, communication, line structures and operation. Among many safety standards of these systems, contact force between wheels and lines can be chosen since a derailment coefficient evaluated by contract force is the most important fact that decides the safety of railways. Especially regarding express trains, since they run twice faster than conventional ones, the evaluation of a derailment coefficient is more important than any other criteria. Currently, Korean express trains between Seoul and Pusan use the same stations as conventional trains in Daejeon and Dong-Daegu; therefore, express trains run on conventional lines from express lines. This paper describes test results acquired by increasing the train speed where express lines and conventional lines are connected. Test results tell that it is safe with under 0.8 derailment coefficient and running time is reduced by 10~30 seconds in each section.

scholarly journals A Kind of Real-time Speed Measuring System of High Speed Train Based on Ethernet

2012 ◽  
Vol 29 ◽  
pp. 1218-1222
Author(s):  
Wang Qingmin ◽  
Su Mubiao ◽  
Liu Yuhong ◽  
Yang Yaoen
Keyword(s):  
Real Time ◽  
High Speed ◽  
Measuring System ◽  
High Speed Train

Active Control of a High-Speed Pantograph

1997 ◽  
Vol 119 (1) ◽  
pp. 1-4 ◽  
Author(s):  
D. N. O’Connor ◽  
S. D. Eppinger ◽  
W. P. Seering ◽  
D. N. Wormley
Keyword(s):  
Dynamic Model ◽  
Active Control ◽  
Contact Force ◽  
High Speed ◽  
High Speed Train ◽  
Single Measurement ◽  
Force Variation ◽  
Catenary System ◽  
And Performance ◽  
And Control

The design and performance of an active controller for a pantograph which collects current for a high-speed train are considered. A dynamic model of the pantograph/catenary system is described and control objectives are established. A design which incorporates a frame-actuated controller and requires only a single measurement is described. Over an array of train speeds, the contact force variation with the actively controlled pantograph is 50 percent less than for the equivalent passive pantograph system.

Output–Feedback Regulation of the Contact-Force in High-Speed Train Pantographs

2004 ◽  
Vol 126 (1) ◽  
pp. 82-87 ◽  
Author(s):  
Alessandro Pisano ◽  
Elio Usai
Keyword(s):  
Contact Force ◽  
Output Feedback ◽  
High Speed ◽  
Output Feedback Control ◽  
Feedback Regulation ◽  
High Gain ◽  
Transportation Systems ◽  
Equivalent Stiffness ◽  
High Speed Train ◽  
Mechanical Oscillations

One of the main problems in high-speed train transportation systems is to counteract the fast variations of the contact force between the catenary and the pantograph collector end. The variation of the catenary equivalent stiffness, due to the suspending system, originates mechanical oscillations whose frequency and magnitude are larger and larger as the train speed increases. Such oscillations cause electric arcs that damage the mechanical structure and compromise the collection of the current from the supply wire, degradating the overall performance. Active pantographs offer the possibility of affecting the contact force evolution by suitably modifying a control torque applied at the lower arm of the pantograph. We consider the equivalent stiffness of the catenary as an uncertainty to compensate for by suitable robust control techniques, and, under the assumption that a noisy measure of the actual contact force is available, we propose an output-feedback control scheme based on higher-order sliding modes and high-gain observers. That combination allows for an almost-complete rejection of the undesired oscillations of the contact force, as confirmed by simulations, and is very attractive for real-time implementation purposes, due to its simplicity and robustness.

A study on the measurement of contact force of pantograph on high speed train

2006 ◽  
Vol 20 (10) ◽  
pp. 1548-1556 ◽  
Author(s):  
Sung-Il Seo ◽  
Yong-Hyun Cho ◽  
Jin-Yong Mok ◽  
Choon-Soo Park
Keyword(s):  
Contact Force ◽  
High Speed ◽  
High Speed Train
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