Distributed arrival time control (DATC) is a highly distributed feedback control algorithm for the scheduling problems in heterarchical operation systems [V.V. Prabhu, Performance of real-time distributed arrival time control in heterarchical manufacturing systems, IIE Transactions 32 (2000) 323–331]. Although DATC has presented outstanding performance for the real-time scheduling problems in d...

We introduce a new model and mathematical formulation for planning crane moves in the storage yard of container terminals. Our objective is to develop a tool that captures customercentric elements, especially service time, and helps operators to manage costly relocation moves. Our model incorporates several practical details and provides port operators with expanded capabilities including plann...

Rail mounted gantry crane (RMGC) scheduling is important in reducing makespan of handling operation and improving container handling efficiency. In this paper, we present an RMGC scheduling optimization model, whose objective is to determine an optimization handling sequence in order to minimize RMGC idle load time in handling tasks. An ant colony optimization is proposed to obtain near optimal...

In this work, we study the integrated berth and crane scheduling problem in a tidal port with multiple terminals, considering uncertainties, tides, maximum coverage of cranes interference between cranes. For coping certain number randomly generated samples are used to evaluate solutions, slack variables introduced reduce impact caused by variation vessel arrival operational efficiency. A novel ...

Satisfactory real time control of the overhead crane facilitating fast transit (< 3s) and minimal swing (< 4°) was achieved in the x, y and z directions. Control was achieved in each individual direction using experimental modelling techniques, careful sampling frequency selection, NMSS representation and LQR controller design. To overcome non-linear model variation, a gain scheduling algorithm...

The performance of a container terminal depends on many aspects of operations. This paper focuses on the optimal sequencing of a yard crane (or YC for short) for serving a fleet of vehicles for delivery and pickup jobs. The objective is to minimize the average vehicle waiting time. While heuristic algorithms could not guarantee an optimal solution, a conventional mathematical formulation such a...