Abstract
A tower crane is widely used in a dam construction site. As the crane gyrates, a cargo swings in the circumferential and radial direction. In order to carry cargos to a required position in short time, the swinging motion should be suppressed. Since the crane operation is strongly relied on the operator's empirical technique simple automatic crane operating procedure by which swinging motion is suppressed enough to complete conveyance in a short time is strongly required. In this study, two-stage velocity pattern was adopted for simple automatic operation to minimize residual swinging motion. The applicability of the proposed method was investigated by means of numerical simulations.
