car body acceleration is an important factor affecting track safety and ride comfort, which are two primary aspects of railway systems. though track level is an important source of wagon body acceleration, no quantitative relation between them is available and the aim of this paper is to propose a method to address this issue. to do so, car body acceleration is determined using a 10 dof simulat...

It is known, that track deterioration (loss of its geometry) strongly depends on track support conditions, particularly on the ballast. In this paper a novel approach is presented to predict the evolution of track vertical irregularities due to vehicle-track dynamic interaction taking into account ballast stiffness with dry friction. An applied vehicle-track model is composed of a railway car a...

Our previous work on adaptation of the Cellular Automaton (CA) track finder [1] to the realistic STS geometry with overlapping sensors allowed to recover the high tracks-finding efficiency [2] which it has had for the simplified STS description with sensors of each station arranged at the same Z position (the “same-Z” geometry). Below we report on a detailed study of the behaviour of the track ...

Analysing track geometry defects is critical for safe and effective railway transportation. Rectifying the appropriate number, types and combinations of geo-defects can effectively reduce the probability of derailments. In this paper, we propose an analytical framework to assist geo-defect rectification decision making. Our major contributions lie in formulating and integrating the following th...

Optram is a computer software for evaluation of track geometry quality data, used as a decision support in planning and follow-up of tamping maintenance for Swedish railways. The software was introduced at the Swedish Transport Administration year 2009 but has not reached the intended number of users. The purpose with this thesis is to suggest how Optram can be improved as a decision support in...

Figure 1. This overview image displays the 3D streamlines representing the DTI tracks, several functional areas, the vasculature and the underlying anatomy clipped at an oblique angle. The focus of this poster is the addition of the track geometry to an existing fMRI visualization application. On the right we can see the cortical spinal track (cyan) projecting from the left hand motor region (g...

Abstract To improve the accuracy of track association between radar and infrared sensors, a multi-source distributed method based on spatial geometry is proposed. This uses rough fine to judge correlation tracks. Rough calculates statistical distance through weighted norm redundant information difference tracks determines threshold by hypothesis testing obtain multiple successfully correlated w...