STUDY OF THE PENDULAR MOTIONS OF THE FORESTRY GRAPPLE

Abstract

In this paper, an analysis of the dynamics of the technological work processes of forestry grapples was carried out. The purpose of the paper is to highlight the dynamic effects of shock-type actions on the movement of the loaded grapple. Several constructive grapples variants were proposed and the influence of the position of the center of mass on the oscillations of the working tool in perpendicular planes was analyzed. The simulation of the movements was performed in the Matlab environment and the rotation velocities diagrams for both slewing and swaying motions of the grapple were obtained, for sudden commands performed by a less experienced operator. The results will form the basis for developing a solution for reducing the amplitudes of these movements, to improve the stability of the grapple in the working process.