A scaled roller test rig for high-speed vehicles

Allotta, Benedetto; Pugi, Luca; Malvezzi, Monica; Bartolini, Fabio; Cangioli, Filippo

doi:10.1080/00423111003663576

Cited by 29 publications

(18 citation statements)

References 9 publications

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“…The three-dimensional multi-body model of the MDM roller rig presented in this paper is more accurate than those described in the previous works [8,10]. It consists of two parts: the scaled roller rig and the scaled vehicle (half vehicle, according to the architecture introduced before).…”

Section: Mdm Roller Rig: Multi-body Modelmentioning

confidence: 78%

“…Some previous studies described the design of an MDM roller rig and the considered scaling hypothesis [4,5,10].…”

Section: Mdm Roller Rig: Multi-body Modelmentioning

confidence: 99%

“…The scaled roller-rig parameters are detailed in some previous works [10]. The scaled vehicle multi-body model is composed of six rigid bodies: the half car body, the front bogie and two wheelsets.…”

Section: Mdm Roller Rig: Multi-body Modelmentioning

confidence: 99%

“…The scaled bogie dimensions are referred to this vehicle by means of properly scaling factors. Starting from these values, the MDM roller rig has been designed [10] according to the architecture previously presented. The maximum values of the roller angular velocity ω w = 200 rad/s and roller motor torque C sc S = 20, 000/φ C N m have been derived from practical considerations on the operative conditions of the considered devices, derived from some previous analysis conducted on a full-scale test rig and described in [10].…”

Section: Mdm Roller Rig: Multi-body Modelmentioning

confidence: 99%

“…• the MDM hardware scaled roller rig [10]: it is composed of the scaled bogie and the actuated rollers. The scaled bogie includes the bogie body, two wheelsets and the primary and secondary suspensions.…”

Section: General Architecture Of the Scaled Roller Rigmentioning

confidence: 99%

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A numerical model of a HIL scaled roller rig for simulation of wheel–rail degraded adhesion condition

Conti

Meli

Pugi

et al. 2012

Vehicle System Dynamics

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PLEASE SCROLL DOWN FOR ARTICLEFull terms and conditions of use: http://www.tandfonline.com/page/terms-andconditions This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden.The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. The accuracy of any instructions, formulae, and drug doses should be independently verified with primary sources. The publisher shall not be liable for any loss, actions, claims, proceedings, demand, or costs or damages whatsoever or howsoever caused arising directly or indirectly in connection with or arising out of the use of this material. Scaled roller rigs used for railway applications play a fundamental role in the development of new technologies and new devices, combining the hardware in the loop (HIL) benefits with the reduction of the economic investments. The main problem of the scaled roller rig with respect to the full scale ones is the improved complexity due to the scaling factors. For this reason, before building the test rig, the development of a software model of the HIL system can be useful to analyse the system behaviour in different operative conditions. One has to consider the multi-body behaviour of the scaled roller rig, the controller and the model of the virtual vehicle, whose dynamics has to be reproduced on the rig. The main purpose of this work is the development of a complete model that satisfies the previous requirements and in particular the performance analysis of the controller and of the dynamical behaviour of the scaled roller rig when some disturbances are simulated with low adhesion conditions. Since the scaled roller rig will be used to simulate degraded adhesion conditions, accurate and realistic wheel-roller contact model also has to be included in the model. The contact model consists of two parts: the contact point detection and the adhesion model. The first part is based on a numerical method described in some previous studies for the wheel-rail case and modified to simulate the three-dimensional contact between revolute surfaces (wheel-roller). The second part consists in the evaluation of the contact forces by means of the Hertz theory for the normal problem and the Kalker theory for the tangential problem. Some numerical tests were performed, in particular low adhesion conditions were simulated, and bogie hunting and dynamical imbalance of the wheelsets were introduced. The tests were devoted to verify the robustness of control system with respect to some of the more frequent disturbances that may influence the roller rig dynamics. In particular we verified that the wheelset imbalance could significantly influence system performance, and to reduce the effect of this disturbance a multistate filter was designed.

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Section: Mdm Roller Rig: Multi-body Modelmentioning

confidence: 78%

“…Some previous studies described the design of an MDM roller rig and the considered scaling hypothesis [4,5,10].…”

Section: Mdm Roller Rig: Multi-body Modelmentioning

confidence: 99%

Section: Mdm Roller Rig: Multi-body Modelmentioning

confidence: 99%

Section: Mdm Roller Rig: Multi-body Modelmentioning

confidence: 99%

Section: General Architecture Of the Scaled Roller Rigmentioning

confidence: 99%