Ověření výkonnosti harvestorové technologie rozdílných pracovních činností při těžbě lesních dřevin

This Master's thesis deals with harvester technology used for forest harvesting, mainly with its efficiency (performance). The thesis describes various types of harvesting in which harvesters are used the most and compares their usage for forest harvesting with the usage of chainsaws. Efficiency is very closely related to the series of inner and outer factors, which influence it both positively and negatively. The impact of these factors is evaluated based on the individual cycles during the harvest and field observations during the variety of harvesting operations. Amongst the most prominent factors are for example operator's experience, type of harvested wood and its characteristics, engine power, performance of hydraulic systems, type of chassis, terrain quality or the influence of meteorological conditions. The aim of this Master's thesis is to perform all necessary measurements and, while using corrected coefficients, alter the calculation of theoretical efficiency to correlate with the actual efficiency