Skidders are very cost-effective extraction machines, and winch-assist systems may extend their operating range to increasingly steep terrain. The use of skidder is relatively new, little information available about operational efficiency potential soil impact. A productivity disturbance study was carried out in Southland (New Zealand) gauge the benefits winch assistance by comparing performanc...

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...

IN T R O D U C T IO N It is generally agreed that a wet pavement surface presents less resistance to skidding than does the same surface in a dry condition. It is also well known that ice and snow are very slippery; but on the other hand, they are special conditions which do not reflect any skid characteristic of the pavement surface. It is, therefore, the wet surface condition that is critical...

In this paper, we develop a new method for Wheeled Mobile Robot (WMR) fault detection. Specifically, we develop kinematic and dynamic models of the WMR in the presence of faults such as a change in the wheel radius (e.g., deformation, broken spoke, flat tire) or general kinematic disturbances that model slipping or skidding faults. Utilizing the WMR models, we employ a torque filtering techniqu...

Accident reconstructionists often determine pre-collision conditions based on post-collision evidence. Energy-based speed calculations for skidding vehicles are commonly used and have been the basis for numerous theoretical and experimental works. The simplest analysis technique, “skid-to-stop” is fairly well understood, however the more complex circumstance of a spinning trajectory is less wel...

the effects of traffic frequency and skid trail slope on dry bulk density, litter mass and rutting are examined. treatments included a combination of four different traffic frequencies (3, 7, 14, and 20 passes of a rubber skidder) and three levels of slope ( 20%.) the results showed that dry bulk density, rut depth and soil displacement increased with the increase of traffic frequency and slope...

Abstract Intensive forestry operations may cause soil compaction, plastic disturbances and rutting, which are responsible for undesirable effects on soils, vegetation water bodies. Despite the numerous studies aimed to identify main factors affecting damages, it still remains unclear whether wood extraction methods driving direction (uphill or downhill) affect impacts of forest machines. This r...

The article examines the use of antiskid sensor to gain maximum trailed load.Skidding means slip wheels a vehicle (tram, railway carriage) along bearing surface (road, rails) where linear speed wheel is lower than towards vehicle.
 occurs during braking. It caused by excess braking force over traction with surface. Skidding rail vehicles leads wear-out locked in place their contact and fla...