In the Shafaroud forest, logging operation is generally performed by using selective cutting methods. Chainsaw and cable skidder are two main forest machines for harvesting of this forest. However, forest harvesting operations result in serious residual stand damage during felling, winching and skidding operations in this forest. Residual stand damage resulting from selective cutting was asses...

The following paper proposes a novel application of Skid-to-Turn maneuvers for fixed wing Unmanned Aerial Vehicles (UAVs) inspecting locally linear infrastructure. Fixed wing UAVs, following the design of manned aircraft, commonly employ Bank-to-Turn maneuvers to change heading and thus direction of travel. Whilst effective, banking an aircraft during the inspection of ground based features hin...

In this paper, we discuss a motion control of a twowheeled mobile robot. In the design of a controller for the system, a kinematic model is usually used; The wheels don’t skid at all and the mobile robot is regarded as a 3-dimensional 2-input nonholonomic system without drift. Many controllers based on the kinematic model have been proposed. However, in a real world, the wheels may skid on the ...

The objective of this paper is to show that how the development skid plate can achieve without increasing gauge and upgrading material properties. There are certain factors which influence such as rail width, shape, ground clearance, attachment points, load coming on general shape object for it plate's design purpose protect (transfer case, fuel tank etc.). This document also covers CAE procedu...

Abstract To make a trajectory enough to track unmanned skid-steering vehicles, planning method is proposed in this paper. The planner consists of velocity planning, curvature and path planning. Subject the constraints jerk acceleration, has five possibilities. Then taking into account, three And according sequence sequence, information can be obtained by kinematic model. verify presented method...

Hydrogen refueling stations are one of the key infrastructure components for hydrogen-fueled economy. Skid-mounted hydrogen (SHRSs) can be more easily commercialized due to their smaller footprints and lower costs compared stationary stations. The present work modeled explosions in a skid-mounted station predict overpressures hydrogen-air mixtures investigate protective effects different explos...

Determining the efficient density for forest roads is essential to decrease the costs of skidding and road constructing in forestry plans. In order to estimate the optimal density for road network in Dalak kheyl forest district (Mazandaran Wood and Paper Industries), we calculated the roading costs and hourly costs of Timber jack 450C and HSM 904 skidders. The length of skid trails was measured...

We develop and empirically implement a model of optimal replacement of rental equipment and apply the model to derive detailed optimal replacement strategies for five different types of rental machinery: 1) excavators, 2) high reach forklifts, 3) skid steers, 4) scissor lifts, and 5) telescopic booms. Using data on actual replacements, revenues, maintenance costs, new machine prices and resale ...