N圧ハイブリッド油圧源とそれを用いた高応答高効率油圧サーボシステムに関する研究

摘要

In a constant pressure valve-controlled hydraulic servo system, the response is good but the efficiency is deteriorated. In a load-sensing pump-controlled hydraulic servo system, the efficiency is good but the response needs improvement. In this study, an N-level pressure hybrid power supply is proposed to realize high efficiency and high response simultaneously. In this paper, the characteristics and the working principle are described. An experimental setup of a 2-level pressure hybrid power supply is used to conduct the experiments. Experimental results show that the position response and force response of the proposed system followed the references quite well, while the efficiency is improved greatly compared with a conventional constant pressure valve-controlled hydraulic servo system.