Development of a Trolly-Position Control System Using Wire Tension in Dynamic Lift Off for Overhead Travelling Cranes

Abstract

While the automation of overhead travelling cranes is progressing, the ‘dynamic lift off’ process is still manually operated. In this paper, we thus developed an automatic ‘dynamic lift off ’system based on a trolly-position control system using wire tension. The system suppresses swaying of the suspended load after the dynamic lift off by correcting the suspension position so that the combined direction of the tension of each suspension wire matches the gravity direction of the suspended load. As a result of the experiment using the physical simulation using Unity and the developed scale model, we confirmed that the sway of the suspended load can be suppressed by using the automatic trolly-position control system than the manual operation.