126 ボンドグラフによるカウンタバランス弁を用いた油圧回路の動特性解析

概要

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This paper deals with analysis of the dynamic characteristics of the oil-hydraulic circuit with a counterbalance valve. In oil-hydraulic circuit of construction machinery with large inertial load, a counterbalance valve is employed to maintain control of a vertical oil-hydraulic cylinder to prevent it from descending due to gravity. However, its dynamic behavior may become oscillatory and sometimes unstable. It is important, therefore, to investigate its dynamic characteristics. Furthermore, to make the design of the circuit systematic, it is necessary to establish the mathematical model which is accurate enough to predict its dynamic characteristics. In the present paper, both experimental and simulation studies are performed. By making use of experimental results, a suitable mathematical model of the oil-hydraulic circuit with a counterbalance valve is obtained. In modeling, bondgraphs are employed, which represent a system model based on power train.
社団法人日本機械学会の論文
2002-08-29