Cantilever Cranes

Anti-sway control system for cantilever cranes

A process employing a computer controlled crane system for controlling the motion of a movable trolley from which a load is suspended at a variable hoist length therefrom to meet a selected arbitrary horizontal velocity reference while preventing sway of the load involves the steps of first, determining a lateral acceleration to reduce by a factor of one-half the sway energy contributed by (1) ...

Cranes of the World: 8. Cranes in Myth and Legend

Control of Shipboard Cranes

We propose a new shipboard crane configuration for offloading cargo in open seas. We show that the “Maryland Rigging” crane of ship’s configuration, used in association with a friction control mechanism, provides a very effective method for reducing load pendulation caused by the motion of the crane in the roll direction. The effectiveness of the control technique is obtained by comparing the p...

Dynamic Analysis of Cranes

The objective of this paper is to analyze the crane structures as a step to study their effects on the structures working integrally with them. The interaction between cranes and those structures has dominant effects on the global system behavior. Crane structures may have many forms of space structures. It is not logical or economical to perform experimental modal analysis to all of them to in...

Advances in Container Cranes Automation

This paper summarizes the most important advances of the used crane control technology in perspective of automatic operation of container cranes. Faster and more productive container cranes demands highly efficient yard system. Storage capacity is the limitation for most terminals today; automatic operation offers optimum stacking density and peak capacity equivalent for continuous manning of e...