scholarly journals Non-Contact Force Measurement for Current Collection in a 25kV Overhead Line Electrified Railway

2016 ◽  
Author(s):  
M.R. Arthington ◽  
P.T. Barnes ◽  
S.R. Duncan
Keyword(s):  
Contact Force ◽  
Force Measurement ◽  
Overhead Line ◽  
Current Collection ◽  
Electrified Railway

Computer Evaluation of Controlled Pantographs for Current Collection From Simple Catenary Overhead Equipment at High Speed

1983 ◽  
Vol 105 (4) ◽  
pp. 287-294 ◽  
Author(s):  
T. Vinayagalingam
Keyword(s):  
Contact Force ◽  
High Speed ◽  
Overhead Line ◽  
Combined System ◽  
Current Collection ◽  
Constant Height ◽  
Force Profile ◽  
Force Variation ◽  
Computer Simulation Technique

A digital computer simulation technique is used to study the effects of changing pantograph characteristics upon the quality of current collection from simple catenary overhead equipment at high speed. In particular, the likely benefits to be derived by the use of controlled pantographs are assessed. Pantograph performance is judged on the basis of contact force variation and displacement responses of pantograph and contact wire. These studies have shown that the dynamic displacements of the combined system are determined primarily by the overhead line parameters rather than by the pantograph. At higher speeds droppers in the vicinity of the pantograph slacken and this is seen to influence significantly the contact force profile. On a “constant height” overhead line, the proposed “frame compensated” and “panhead inertia compensated” pantographs do not show any marked improvement in the quality of current collection.

Impact of overhead line irregularity on current collection and diagnostics based on the measurement of pantograph dynamics

2007 ◽  
Vol 221 (4) ◽  
pp. 547-559 ◽  
Author(s):  
A Collina ◽  
F Fossati ◽  
M Papi ◽  
F Resta
Keyword(s):  
Direct Measurement ◽  
Contact Force ◽  
Estimation Procedure ◽  
Overhead Line ◽  
Large Database ◽  
Contact Wire ◽  
Current Collection ◽  
Train Speed ◽  
The One

As train speed increases, contact wire irregularity affects the quality of current collection more and more. The possibility of achieving the maximum operating speed depends also on the maintenance level of the overhead line (OHL). In the present paper, the influence of contact wire irregularity (in terms of vertical deviation of its position) is investigated both experimentally and by means of numerical simulation of the dynamic interaction of pantograph and catenary. In a first step, the capability of the simulation to reproduce the effect of a singularity in the contact wire height along the line has been tested by comparison with available experimental results. The same model has been subsequently used to perform numerical experiments concerning the effects of several types of distributed defects on the catenary. Afterwards, considering the data generated with the simulation as experimental data, a procedure to find the signature in terms of the contact force of the considered distributed defects on the OHL has been proposed. In this procedure, the contact force is not measured, but estimated from the motion of the pantograph, by means of an application of the extended Kalman filter. The adoption of an estimation procedure for the contact force, instead of a direct measurement, would allow the installation of a measurement system that is much simpler than the one required for the direct measurement of contact force. For this feature, it could be installed, at least in principle, on ordinary trains, allowing to perform an extensive monitoring and diagnostic activity with a large database.

A force identification method for slider/disk contact force measurement

2000 ◽  
Vol 36 (5) ◽  
pp. 2667-2670 ◽  
Author(s):  
Qing-Hua Zen ◽  
M. Chapin ◽  
D.B. Bogy
Keyword(s):  
Contact Force ◽  
Force Measurement ◽  
Force Identification ◽  
Identification Method ◽  
Disk Contact

Adaptive Contact Force Control of a Flexible Beam Using Output Feedback

2000 ◽  
Author(s):  
Woosoon Yim
Keyword(s):  
Contact Force ◽  
Contact Surface ◽  
Force Control ◽  
Closed Loop ◽  
Force Measurement ◽  
Transient Behavior ◽  
Loop System ◽  
Flexible Beam ◽  
Reference Trajectory ◽  
Closed Loop System

Abstract This paper presents an adaptive force trajectory control of a flexible beam using a piezoceramic actuator. Based on the adaptive backstepping method, a force control system using only force measurement is designed. For the derivation of the control law, it is assumed that parameters of the beam and contact surface stiffness are unknown. It is shown that in the closed-loop system, the contact force tracks a given reference trajectory and the beam vibration is suppressed as well. Digital simulations results show that the closed-loop system has good transient behavior and robust performance in the presence of uncertainties in the parameters of the flexible beam and the contact surface.

1A1-A17 Segmentation method of human manipulation task based on contact force measurement

2009 ◽  
Vol 2009 (0) ◽  
pp. _1A1-A17_1-_1A1-A17_4
Author(s):  
Kazuya MATSUO ◽  
Kouji MURAKAMI ◽  
Tsutomu HASEGAWA ◽  
Ryo KURAZUME
Keyword(s):  
Contact Force ◽  
Force Measurement ◽  
Segmentation Method ◽  
Manipulation Task

Towards a tri-axial flexible force sensor for catheter contact force measurement

2016 ◽  
Author(s):  
Hardik J. Pandya ◽  
Jun Sheng ◽  
Jaydev P. Desai
Keyword(s):  
Contact Force ◽  
Force Measurement ◽  
Force Sensor
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