We consider a container operator, who serves a number of shipping lines by discharging and loading their periodically arriving container vessels. Disruptions on vessels’ travel times lead to stochastic arrivals in the port. To cope with these disturbances, the operator and each vessel line agree on two types of arrivals: arrivals i) within, and ii) out of a so-called arrival window. If a vessel...

Problem statement: Most of the common gantry crane results in a sway motion when transporting the load as fast as possible. In addition, precise cart position control of gantry crane must required a zero or near zero residual sway. Approach: In this study, the development of hybrid control schemes for input tracking and anti-sway control of a gantry crane system was investigated. To study the e...

With the rapid development of construction industry, tower cranes are increasingly used in coastal engineering. However, due to complexity their operating environment, vulnerable typhoons, thunderstorms, and other extreme natural disasters. Therefore, it is becoming important carry out safety warnings for crane structure under action strong winds. In this paper, a real-time monitoring system re...

This paper is dedicated to the memory of Prof. Ioan Dzitac, one fathers this journal and its founding Editor-in-Chief till 2021. The addresses performance improvement three Single Input-Single Output (SISO) fuzzy control systems that separately positions interest tower crane systems, namely cart position, arm angular position payload position. Three separate low-cost SISO controllers are employ...

When suspended payloads are moved in a material handling environment pendulum like oscillations are naturally introduced. This presents a problem any time especially when expensive and/or delicate objects are moved. In a steel industry environment objects have to be placed in tight locations after finishing up of rolling. Typically an object (rolled coil) is lifted by a hook on the end of a cab...

We study the coordinated scheduling problem of hybrid batch production on a single batching machine and two-stage transportation connecting the production, where there is a crane available in the first-stage transportation that transports jobs from the warehouse to the machine and there is a vehicle available in the second-stage transportation to deliver jobs from the machine to the customer. A...

In the Multi-Spreader Crane Scheduling Problem (MSCSP), containers with identical dimensions but variable weights are arranged along a grid. A multi-spreader crane is used to lift all containers. The has m > 1 modes. When it in p th mode, can remove adjacent same row at time as long total weight of does not exceed loading capacity ? . Such takes h minutes. It also c , q minutes for switch from ...

Finding an optimal solution to the 4-peg version of the classic Tower of Hanoi problem has been an open problem since the 19th century, despite the existence of a presumed-optimal solution. We verify that the presumed-optimal Frame-Stewart algorithm for 4-peg Tower of Hanoi is indeed optimal, for up to 20 discs. We also develop a distributed Tower of Hanoi algorithm, and present 2D and 3D repre...

In this paper, we address the Stacking Problem. Its objective is to determine the sequence of movements carried out by a stacking crane to store and retrieve a set of homogeneous blocks in a two-dimensional storage during a well-defined planning horizon in such a way that the number of relocation movements is minimized. We propose a heuristic algorithm that determines the target stack of each i...

Oflshore loading and unloadhg of cargo vessels and on board cargo relocation during conditions of Sea State 3 or greater have been found to be difficult with existing crane technology due to oscillation of the payload. A new type of crane which uses four actuated cables to control the motion of the payload is presented. The closed chain configuration will intuitively provide more stability with...