독립제어밸브에 의한 굴삭기 버켓 액추에이터 압력 제어 및 회생 에너지에 관한 연구

Abstract

A cylinder control system of the conventional construction machine has been controlled by hydraulic spool valves. This system is low-cost but system efficiency is not high. Recently, to improve this, all valves are controlled electronically and independently. It is called IMVT(Independent Metering Valve Technology).

The purpose of the study is to find proper IMV pressure control method for excavator and to validate excavator's bucket regeneration energy effect by controlling the IMV system. In this paper, we mathematically describe the bucket system of excavator first. And then, based on these results, we design the control system which is divided into two operations(none regeneration or regeneration). The results of the experiment show the desirable performance and usefulness of the designed control system. The energy saving effect of regeneration is 15%, compared to none regeneration operation.