Performance of Linear Motor Type Rail Brake Using Roller Rig Test Bench

The work shows the use of a scaled roller rig to validate a real time wheel-rail contact code developed to study the wheel rail adhesion and the wear evolution. The code allows the profiles to change at each time step in order to take into account the material loss due to the wear process. The contact code replicates a testing machine composed of a roller rig with a prototype of a single suspended wheelset pressed onto it with a variable load. The roller rig, developed at Politecnico di Torino, is used to validate and optimize the contact code referring to experimental data directly measured in real time. The test bench, in fact, allows measurement of specific kinematical quantities and forces that are elaborated by the real-time code in order to produce numerical results for comparison with the experimental ones. This approach can be applied both to the determination of wheel-rail adhesion and to the wear process. The test rig is also equipped with a laser profilometer that allows measurement of the wheel and rail profiles with a very high accuracy.

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Active suspension system with integrated electrical tubular linear motor: design, control strategy and validation

Archives of Electrical Engineering ◽

10.1515/aee-2015-0045 ◽

2015 ◽

Vol 64 (4) ◽

pp. 605-616 ◽

Cited By ~ 3

Author(s):

Andreas Thul ◽

Daniel Eggers ◽

Björn Riemer ◽

Kay Hameyer

Keyword(s):

Control Strategy ◽

Test Bench ◽

Active Suspension ◽

Linear Motor ◽

Suspension System ◽

System A ◽

Motor Design ◽

And Control ◽

Design And Construction

Abstract This paper focuses on the design and control of an active suspension system, where a tubular linear motor is integrated into a spring damper system of a vehicle. The spring takes up the weight of the vehicle. Therefore the electric linear motor can be designed very compact as it has to provide forces to adjust the damping characteristic only. Design and construction of the active suspension system, a control strategy and validation measurements at a test bench are presented.

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Dynamic Behavior of a Railway Wheelset on a Roller Rig versus Tangent Track

Shock and Vibration ◽

10.1155/2004/280673 ◽

2004 ◽

Vol 11 (3-4) ◽

pp. 467-492 ◽

Cited By ~ 8

Author(s):

N. Bosso ◽

A. Gugliotta ◽

A. Somà

Keyword(s):

Numerical Simulation ◽

Dynamic Behavior ◽

Experimental Analysis ◽

Test Bench ◽

Contact Point ◽

Full Scale ◽

Analytical Results ◽

Roller Rig

This paper addresses the comparison of dynamic behavior of a wheelset on roller and on rails. The development of equations of kinematics and motion allow to put in evidence the intrinsic differences between the dynamic behavior on rail and on roller. The stylized conical profile approximation of the wheel allows to focus the attention on the differences in creepages definition and in contact point shift due to the roller curvature. The treatise is addressed to a full scale roller and can be extended in the case of scaled roller rig to be applied in the case of the test bench developed for experimental analysis. In the present paper numerical simulation and examples are used to proof the analytical results.

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Developing a Movable Part for a Test Bench Featuring a Linear Motor and Magnetic Suspensionfor Simulating Inertial Loads on an Object

Herald of the Bauman Moscow State Technical University Series Mechanical Engineering ◽

10.18698/0236-3941-2020-5-4-18 ◽

2020 ◽

pp. 4-18

Author(s):

I.A. Lobastov ◽

A.V. Paleshkin

Keyword(s):

Software Package ◽

Test Bench ◽

Linear Acceleration ◽

Planetary Atmospheres ◽

Linear Motor ◽

Magnetic Suspension ◽

Movable Part ◽

Structural Layout ◽

Engineering Parameters ◽

Path Structure

We selected the main parameters for a new layout of a centrifugal installation featuring a linear motor and magnetic suspension. Since existing test benches for simulating linear accelerations have a range of disadvantages, we propose to consider an alternative to the classical layout, in particular, to reject the rotary link and replace it by a ring-like path structure with a linear motor, along which a trolley carrying the object under investigation will move on a magnetic suspension. We analysed various spatial stabilisation systems for the trolley moving at high velocities. We defined the key initial data, taking into account descent into planetary atmospheres, design specifics of products subjected to G-forces and existing centrifugal installations. We computed the parameters of a magnetic suspension based on high-temperature superconducting yttrium ceramics and electrical engineering parameters of the linear motor, and carried out strength calculations for the movable part of the test bench using the Femap with NX Nastran software package, accounting for the operational loads intended. The paper presents an option for implementing a new structural layout of an experimental installation that ensures linear acceleration testing in various operation modes

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