506 Experimental Study on Vibration Control of Rail Vehicle Combined with Centering Action in High-Speed Curve Negotiation

2001 ◽  
Vol 2001.38 (0) ◽  
pp. 143-144
Author(s):  
Hiroshi YAMAKAMI ◽  
Katsuya TANIFUJI ◽  
Toshio SAKAUE
Keyword(s):  
Experimental Study ◽  
Vibration Control ◽  
High Speed ◽  
Rail Vehicle ◽  
Curve Negotiation

Rail Passenger Vehicle Lateral Dynamic Performance Improvement Through Active Control

1978 ◽  
Vol 100 (4) ◽  
pp. 270-283 ◽  
Author(s):  
P. K. Sinha ◽  
D. N. Wormley ◽  
J. K. Hedrick
Keyword(s):  
Active Control ◽  
High Speed ◽  
Ride Quality ◽  
Vehicle Speed ◽  
Tracking Errors ◽  
Vehicle Performance ◽  
Control Power ◽  
Rail Vehicle ◽  
Performance Reduction ◽  
Curve Negotiation

High speed operation of conventional rail vehicles is limited by a number of dynamic problems including ride quality, curve negotiation, and hunting. Active control is investigated as a technique for improving rail vehicle performance at high speeds. An automatic controller of specified configuration and structure is defined based on the physics of the wheel-rail interaction dynamics which allow a decomposition of dynamic constraints into selected frequency bands and a methodology for selecting the controller parameters is presented. Two controller case studies are examined to demonstrate the effectiveness of controller configuration on rail vehicle performance in terms of ride quality and tracking errors on tangent track while allowing specified curve negotiation requirements to be met. Estimates of control power requirements are also obtained which show that the controller configurations considered produce improvements in vehicle performance—reduction of rms vehicle accelerations by a factor of between 5 and 6 and reduction of rms tracking errors by a factor of between 4 and 5—with modest expenditures of control—power between 1.5 and 2 kw per truck at a vehicle speed of 68.58m/s.

scholarly journals Nonlinear impact of traction rod on the dynamics of a high-speed rail vehicle carbody

2020 ◽  
Vol 34 (12) ◽  
pp. 4989-5003
Author(s):  
Vahid Bokaeian ◽  
Mohammad Ali Rezvani ◽  
Robert Arcos
Keyword(s):  
High Speed ◽  
High Speed Rail ◽  
Rail Vehicle

Experimental study on laminated glass responses of high-speed trains subject to windblown sand particles loading

2021 ◽  
Vol 300 ◽  
pp. 124332
Author(s):  
Gongxun Deng ◽  
Wen Ma ◽  
Yong Peng ◽  
Shiming Wang ◽  
Song Yao ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Speed ◽  
Laminated Glass ◽  
Windblown Sand ◽  
High Speed Trains ◽  
Sand Particles

scholarly journals Experimental study on seismic vibration control of stockers in wafer and LCD panel fabs

Structures ◽  
2021 ◽  
Vol 31 ◽  
pp. 1185-1198
Author(s):  
Yung-Tsang Chen ◽  
Chien-Liang Lee ◽  
Miao-Chi Wang ◽  
Yen-Po Wang
Keyword(s):  
Experimental Study ◽  
Vibration Control ◽  
Seismic Vibration

Experimental Study of Turbulent Macroinstabilities in an Agitated System with Axial High-Speed Impeller and with Radial Baffles

1996 ◽  
Vol 61 (6) ◽  
pp. 856-867 ◽  
Author(s):  
Oldřich Brůha ◽  
Ivan Fořt ◽  
Pavel Smolka ◽  
Milan Jahoda
Keyword(s):  
Experimental Study ◽  
Flow Field ◽  
High Speed ◽  
Experimental Results ◽  
Turbulent Regime ◽  
Frequency Of Occurrence ◽  
Visualization Method ◽  
Entire Flow

The frequency of turbulent macroinstability occurrence was measured in liquids agitated in a cylindrical baffled vessel. As it has been proved by preceding experimental results of the authors, the stochastic quantity with frequency of occurrence of 10-1 to 100 s-1 is concerned. By suitable choosing the viscosity of liquids and frequency of impeller revolutins, the region of Reynolds mixing numbers was covered from the pure laminar up to fully developed turbulent regime. In addition to the equipment making it possible to record automatically the macroinstability occurrence, also the visualization method and videorecording were employed. It enabled us to describe in more detail the form of entire flow field in the agitated system and its behaviour in connection with the macroinstability occurrence. It follows from the experiments made that under turbulent regime of flow of agitated liquids the frequency of turbulent macroinstability occurrence is the same as the frequency of the primary circulation of agitated liquid.

scholarly journals Study and Analysis of Anti Vibratory Passive and Active Methods Applied to Complex Mechanical System

2012 ◽  
Vol 7 (2) ◽  
Author(s):  
Cédric Lopez ◽  
François Malburet ◽  
André Barraco
Keyword(s):  
Experimental Study ◽  
Comparative Analysis ◽  
Mechanical System ◽  
High Speed ◽  
Test Bench ◽  
Minimization Method ◽  
Controlled System ◽  
Proper Frequency ◽  
Different Parts ◽  
Methods Of Control

This paper studies problematic of a mechanical system composed of different coupled parts submitted to a high speed shock and proposes analysis of anti vibratory passive and active methods based on an experimental and theoretical coupled approach. After a shock, different parts of the system oscillate. If one of them is excited at a particular frequency, such as its proper frequency, important oscillations appear and can lead to the deterioration of the system by introducing important stresses. In this paper, we propose an analysis in order to understand this kind of problem and what we can do to avoid it. Firstly, we discuss problematic and we expose the studied system. In a second time, we develop two approaches of modeling that allow us to understand the phenomenon by carrying out numerical simulations. Then cross checking of model is completed via experimental study on drop test bench. Passive minimization method of vibrations based on experimental and theoretical coupled approach is exposed. Finally, a comparative analysis of different methods of control and experimental results of controlled system are presented.

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