Mathematical Modeling for Pump Controlled System of Hydraulic Drive Unit of Single Bucket Excavator Digging Mechanism

Industrial robots have turned out to be an everyday occurrence for engineers during the last twenty years. Increasing efficiency is one of the hottest research topics in hydraulic system. The comparison between two types of hydraulic control systems, which are the valve, controlled system and the pump-controlled system is essential area of researching. Hydraulic actuator with pump-controlled system is equipped in high power mining excavators and forestry equipment in order to increase efficiency. The purpose of this paper is to build a mathematical model for a hydraulic actuator with pump-controlled system. The boom of single bucket excavator is modeled and simulated as an example. The scheme of this system is presented and itemized. The model of these items is simulated and the control circuits are presented as well as the simulation results.