Abstract
The present study addressed an advanced system that was designed to teach the skills needed to operate an electric overhead traveling crane. In the operation of an overhead traveling crane, to ensure the safe and efficient transport of a load, an operator must be able to suppress the sway of that load. However, considerable training is needed to master this skill. Furthermore, the beginners may cause accidents by operating the crane incorrectly. Therefore, in the present study, we devised a training system in which an operator can safely and efficiently master the operation of an electric overhead traveling crane while suppressing the load sway. In this approach, the operational conditions in which the load sway is suppressed can be derived theoretically. The operational conditions are displayed by the crane simulator as visual instructions in a virtual working environment. The efficacy of the proposed skill training approach with the crane simulator was verified through experiments whereby novices used the crane simulator to perform the task of transporting a load while suppressing load sway.
Highlights
The characteristics of pendanttype operating devices with button-type momentary switches, which are commonly found on overhead traveling cranes, make it even more difficult to suppress the load sway, given that the momentary switches limit the motions of the crane’s moving parts to ON/OFF operations. erefore, there is a demand for a means of safely and efficiently acquiring the skills needed to suppress load sway in an overhead traveling crane operated by a device with momentary switches
From the results of the experiments with the simulator, it can be said that the approach, whereby the operator trains with the sway angles displayed, is the most e ective means of acquiring the skills needed to operate the momentary switches in a way that suppresses the load sway
E following conclusions can be drawn: (1) By developing an overhead traveling crane simulator operated by momentary switches, a beginner trainee can safely learn the skills needed to suppress load sway
Summary
Erefore, there is a demand for a means of safely and efficiently acquiring the skills needed to suppress load sway in an overhead traveling crane operated by a device with momentary switches. An operational assistance system using a joystick with a force display has been proposed as a means of suppressing load sway and avoiding obstacles when operating an overhead traveling crane [24]. Erefore, a trainee can learn how to operate the crane while suppressing the load sway based on the reaction force display and the visual information provided by the simulator. Erefore, a training system by which a trainee can efficiently and safely acquire the skills needed to operate an electric overhead traveling crane using a momentary switch while suppressing the load sway is proposed in this paper.
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