Sona Sediva

MONITORING OF DRIVER'S FATIGUE – STATISTICAL ANALYSIS OF TEST DRIVER TRAJECTORIES IN VARIOUS ENVIRONMENTS AND IN DIFFERENT DRIVER STRESS DEGREES

The aim of this work was to develop a methodology for measuring and evaluation of dynamic behavior of the driver in various environments, to determine the differences between the behavior of unwearied and fatigued driver and to propose a development of a mechanism for detection of dangerous situations. Sets of test drives with unwearied drivers were performed on a highway, in the tunnel and at the simulator, followed by statistical analysis. The most suitable characteristics were determined and used for comparison with data obtained from test drives performed within 24 Hours. Allan deviation and Poincare distance are the best parameters for the determination of drivers behavior, because these parameters are calculated from neighboring consecutive samples and carry immediate information about changes of drivers performance. In the experiments with fatigue-influenced driver, the case of vehicle going to get out of the traffic line was well detectable.

A Driver as the Regulator in Man-Machine System

Abstract The aim of the paper is to present the role of the human element in regularly used man-machine systems (MMS). From the technical point of view, it is possible to denote the human being and the machine as two components of one system. The decision priority problem within the MMS has recently been accentuated, especially in relation to high-risk systems, where any failure of the human factor may have serious consequences.

Analysis of the effect of body shape of multiport averaging Pitot tube on permanent pressure loss using ANSYS/FLUENT

This paper presents the results of simulations of the air flow in a circular pipe with multiport averaging Pitot tube and the effect of the shape of this probe to the permanent pressure loss. The four different types of shapes were evaluated and the flow around them was simulated in ANSYS/Fluent 13.0. It was found that the shape of the cross section has effect on the permanent pressure loss that causes the flowmeter inserted into the pipe. However permanent pressure loss at the multiport averaging Pitot tube is lower in comparison with permanent pressure loss caused by the orifice plate.