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Journal ArticleDOI: 10.1080/00423114.2019.1693048

A novel alternate multibody model for the longitudinal and ride dynamics of a tracked vehicle

04 Mar 2021-Vehicle System Dynamics (Taylor & Francis)-Vol. 59, Iss: 3, pp 433-457
Abstract: This paper presents a novel alternate multibody model for a tracked vehicle by replacing the tracks with a set of imaginary wheels. A planar multibody model with imaginary wheels replacing tracks i...

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5 results found

Journal ArticleDOI: 10.1142/S0219455420501205
Sunil Kumar Sharma1, Jaesun Lee1Institutions (1)
Abstract: In this paper, the semi-active suspension in railway vehicles based on the controlled magnetorheological (MR) fluid dampers is examined, and compared with the semi-active low and semi-active high s...

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Topics: Magnetorheological fluid (65%), Suspension (vehicle) (58%), Damper (50%)

9 Citations

Journal ArticleDOI: 10.1177/1464419320953685
01 Oct 2020-
Abstract: In this paper, the semi-active suspension in railway vehicles based on the controlled Magnetorheological (MR) fluid dampers is examined, and compared with the semi-active low and semi-active high s...

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Topics: Magnetorheological fluid (61%), Damper (52%), Suspension (vehicle) (52%)

5 Citations

Open accessJournal ArticleDOI: 10.1007/S11012-021-01310-W
Luigi Teodosio1, Giuseppe Alferi1, Andrea Genovese1, Flavio Farroni1  +3 moreInstitutions (1)
02 Feb 2021-Meccanica
Abstract: The characterization and reproduction of tyre behaviour for vehicle modelling is a topic of particular interest both for real-time driver in the loop simulations and for offline performance optimization algorithms. Since the accuracy of the tyre forces and moments can be achieved by the accurate physical modelling of all the phenomena concerning the tyre-road interaction, the link between the tyre thermal state and the tyre frictional performance turns into a crucial factor. An integrated numerical methodology, allowing to couple the full 3D CFD (Computational Fluid Dynamics) flux within the internal chamber of the tyre with an equivalent discrete 3D structure model, is proposed with the aim to completely represent the tyre thermodynamic convective behaviour in the steady-state operating conditions. 3D CFD model enables the evaluation of the internal distribution of the gas temperature and of the thermal powers exchanged at each sub-wall in detail. This allows to increase the reliability of the tyre thermodynamic modelling with a particular reference to the proper managing of the aero-thermal flow of the brake disc impact on the rim temperature and therefore on the internal gas dynamics in terms of temperature and pressure, being able to optimize the tyre overall dynamic performance in both warm-up and stabilized thermal conditions. The steady RANS (Reynolds Averaged Navier–Stokes) simulations have been performed employing the 3D CFD model in a wide range of angular velocities with the aim to calculate the convective thermal flux distributions upon rim and inner liner surfaces. The simulation results have been then exploited to derive the convective heat transfer coefficients per each sub domain to be employed within the real-time tyre physical thermal model, with the peculiar advantage of an enhanced model reliability for thermal characteristics. To validate the proposed methodology, the tyre thermal model outputs, in terms of temperatures of internal and external layers, have been validated towards the acquired ones within the specific routine performed on tyre force and moment test bench, confirming an excellent agreement with the experimental data in the entire range of operating conditions explored.

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2 Citations

Open accessJournal ArticleDOI: 10.1016/J.MATPR.2021.11.143
Abstract: Magnetorheological (MR) fluid technology has gotten a lot of attention in recent years, and as a result, it's become a lot better. Its adaptability has led to fast expansion in a variety of engineering applications, including base isolation of civil structures, car suspensions, and a variety of bio-engineering mechanisms, through its implementation in different MR fluid base devices, particularly in MR dampers. The MR damper is a sophisticated application of a semi-active device that reduces vibration efficiently in both on and off modes due to its control capabilities. The MR damper can create a high damping force while consuming very little power, responding quickly and flexibly, and being simple to build. In view of the rising demand for MR dampers, this paper examines the advantages of these semi-active systems over passive and active systems, the versatility of MR damper applications, and the fabrication of various MR damper configurations, as well as providing an overview of various MR damper models.

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Topics: Magnetorheological fluid (60%), Damper (57%)

Open accessDOI: 10.25384/SAGE.C.5031092.V1
19 Jun 2020-
Abstract: In this study, the effect of change in height of a so-called variable configuration of a continuous tracked bogie system on ride comfort performance is investigated To this end, constraint equatio

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28 results found

Journal ArticleDOI: 10.1016/0045-7825(72)90018-7
J. Baumgarte1, J. Baumgarte2Institutions (2)
Abstract: When a given system of differential equations is integrated by numerical and automatic integration it may occur that the solution at hand satisfies an analytical relation which is a corollary of the differential equations but which is unknown to the automatic computer. An example of such a relation is the energy relation in conservative systems or the analytical relation generated by an outer holonomic or non-holonomic constraint provided the Lagrange equations of the first kind are used. It is shown that, in general, the computed numerical values of the solution satisfy such analytic relations with poor accuracy. The aim of the paper is to show how the analytical relations can be satisfied in a stabilized manner in order to improve the numerical accuracy of the solution of the differential equations. The proposed method leads to a modified differential system which is often stable in the sense of Ljapunov, whereas the original system is unstable.

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1,315 Citations

Journal ArticleDOI: 10.1016/S0094-114X(02)00045-9
Gabriele Gilardi1, Inna Sharf1Institutions (1)
Abstract: Impact is a complex phenomenon that occurs when two or more bodies undergo a collision. This phenomenon is important in many different areas––machine design, robotics, multi-body analysis are just a few examples. The purpose of this manuscript is to provide an overview of the state of the art on impact and contact modelling methodologies, taking into account their different aspects, specifically, the energy loss, the influence of the friction model, solution approaches, the multi-contact problem and the experimental verification. The paper is intended to provide a review of results presented in literature and some additional insights into existing models, their interrelationship and the use of these models for impact/contact scenarios encountered in space robotic applications.

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Topics: Literature survey (59%)

644 Citations

Journal ArticleDOI: 10.1016/0022-4898(67)90105-X
Jo-Yung Wong1, A.R. Reece1Institutions (1)
Abstract: A towed wheel is defined as one which has zero torque at the axle. Its performance is completely defined by the force required to drag it along and the degree of skid which results. In order to predict these in terms of soil properties and wheel dimensions it is necessary to analyse the basic characteristics of the distribution of radial and tangential stresses on the soil-wheel interface of a towed wheel.

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Topics: Wheel and axle (68%), Axle (62%), Electronic differential (62%) ... read more

307 Citations

Journal ArticleDOI: 10.1504/IJVD.2006.008450
Abstract: The power spectral density (PSD) representation of road profiles can be used both to assess the road roughness, and as an input to vehicle dynamics. The PSD is often approximated with a simple function, using only a few parameters. The present paper presents a literature survey of such PSD approximations, and tests four approximations on longitudinal road profile data from the entire Swedish state road network.

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Topics: Literature survey (54%)

162 Citations

Open accessJournal ArticleDOI: 10.1109/70.345944
R. Balakrishna1, Ashitava Ghosal1Institutions (1)
01 Feb 1995-
Abstract: Wheeled mobile robots (WMRs) are known to be non-holonomic systems, and most dynamic models of WMRs assume that the wheels undergo rolling without slipping. This paper deals with the problem of modeling and simulation of motion of a WMR when the conditions for rolling are not satisfied at the wheels. The authors use a traction model where the adhesion coefficient between the wheels of a WMR and a hard flat surface is a function of the wheel slip. This traction model is used in conjunction with the dynamic equations of motion to simulate the motion of the WMR. The simulations show that controllers which do not take into account wheel slip give poor tracking performance for the WMR and path deviation is small only for large adhesion coefficients. This work shows the importance of wheel slip and suggests use of accurate traction models for improving tracking performance of a WMR. >

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Topics: Slip (vehicle dynamics) (55%)

128 Citations

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