Topic
Sprung mass
About: Sprung mass is a research topic. Over the lifetime, 1295 publications have been published within this topic receiving 18155 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the idea of using a vehicle moving over a bridge as a message carrier of the dynamic properties of the bridge is theoretically explored in order to identify the key parameters dominating the vehicle-bridge interaction response, while illustrating the key phenomena involved.
451 citations
TL;DR: In this paper, a train is modeled as a series of sprung masses lumped at the bogie positions and a bridge with track irregularities by beam elements, and two sets of equations of motion that are coupled can be written, one for the bridge and the other for each of the sprung masses.
Abstract: The objective of this study is to develop an element that is both accurate and efficient for modeling the vehicle-bridge interaction (VBI) in analysis of railway bridges carrying high-speed trains, which may consist of a number of cars in connection. In this study, a train is modeled as a series of sprung masses lumped at the bogie positions and a bridge with track irregularities by beam elements. Two sets of equations of motion that are coupled can be written, one for the bridge and the other for each of the sprung masses. To resolve the problem of coupling, the sprung mass equation is first discretized using Newmark's finite difference formulas and then condensed to that of the bridge element in contact. The element derived is referred to as the vehicle-bridge interaction element, which has the same number of degrees of freedom (DOF) as the parent element, while possessing the properties of symmetry and bandedness in element matrices. For this reason, conventional assembly procedures can be employed to ...
331 citations
TL;DR: In this paper, a semi-active H∞ control of vehicle suspension with magneto-rheological (MR) damper is studied, where a polynomial model is adopted to characterize the dynamic response of the MR damper.
315 citations
TL;DR: In this article, a delay-dependent memoryless state feedback H ∞ controller is designed in terms of the feasibility of certain delaydependent matrix inequalities, and a numerical example is employed to illustrate the effectiveness of the proposed approach.
257 citations
TL;DR: In this paper, a road adaptive modified skyhook control for the semi-active Macpherson strut suspension system of hydraulic type is investigated, which incorporates the rotational motion of the unsprung mass.
Abstract: In this paper, a road adaptive modified skyhook control for the semi-active Macpherson strut suspension system of hydraulic type is investigated. A new control-oriented model, which incorporates the rotational motion of the unsprung mass, is introduced. The control law extends the conventional skyhook-groundhook control scheme and schedules its gains for various road conditions. Using the vertical acceleration data measured, the road conditions are estimated by using the linearized new model developed. Two filters for estimating the absolute velocity of the sprung mass and the relative velocity in the rattle space are also designed. The hydraulic semi-active actuator dynamics are incorporated in the hardware-in-the-loop tuning stage of the control algorithm developed. The optimal gains for the ISO road classes are discussed. Experimental results are included. @DOI: 10.1115/1.1434265#
245 citations