Skyline tensile forces have been shown to frequently exceed the recommended safety limits during ordinary cable logging operations. Several models for skyline engineering analyses proposed. Although assume a dynamic behaviour, practical solutions are based on static approach without consideration of nature systems.The aim this study was compare field data with calculations derived by dedicated ...

In the current paper was approached braking system of tricycles for controlled skidding, which are used by lovers extreme sports. The complete modeling such a tricycle has been performed and its improved great performance better braking. Also, simulation tests were using finite element to achieve best constructive variant brake disc.

The main topic of this thesis is how to realistically model driver behavior in computer simulations of safety critical traffic events, an increasingly important tool for evaluating automotive active safety systems. By means of a comprehensive literature review, it was found that current driver models are generally poorly validated on relevant near-crash behavior data. Furthermore, competing mod...

Sixteen stands were harvested by either clearcut, shelterwood, group selection, or singletree selection methods. Three of the stands had uneven-aged structure. The other 13 were typical, matrJre, even-aged stands. Hmest intensity @roportion of basal area removed) ranged from 0.27 to 1 .@I. Hanrestcd sites were similar in slope, average diameter at breast height (DBH), and pre-harvest diamcte.r ...

Many patents have suggested that spinning the aircraft wheel before touchdown would lessen tyre wear as indicated by landing smoke and rubber deposites on the runway caused by skidding wheel at the point of impact. In this paper, the required torque to spin the aircraft wheel at approach speed has been calculated using ANSYS Workbench CFX, which is used to determine the wheel aerodynamic forces...

This paper presents a new control algorithm that prevents electrical vehicle from wheel skidding in presence of uncertainties of tire-road condition. An estimator of the maximum effective torque is realized by wheel velocity and input torque, which is based on a pure kinematic relationship between the wheel and the chassis. In order to enhance the stability of the control system and handing per...

A wheeled mobile manipulator system is modeled using Kane’s dynamic equations. Kane’s equations are constructed with minimum effort, are control oriented and provide both physical insight and fast simulations. The powerful tools of Kane’s approach for incorporating nonholonomic motion constraints and bringing noncontributing forces into evidence are exploited. Both nonholonomic constraints asso...