Stress analysis plays a significant role in the design of parts and structures that must carry load [1]. In this study, Crane hook which is one of lifting equipment, frequently used in material handling is investigated. Analytical (Straight beam, curved beam & Winkler-Bach approximation), experimental (Photo-Elasticity) and numerical (FEM) methods were used by various researchers to study stres...

The development of unmanned crane is an important issue of Factory Automation in steel industry. This paper focus on unmanned crane for picking up coils on a trailer although positions and diameters of coils is not fixed. In order to pick up those coils, unmanned crane should know exact 3D coil position. Therefore, in order to find out exact 3D coil’s centers, this paper propose the system that...

As the control system of the ship's crane is nonlinear , time-varying and large inertia, the traditional way to control is difficult to achieve control requirements. The text have the deck crane’ electro-hydraulic proportional valve as the research object, use the way of optimizing input’s fuzzy domain which called variable domain fuzzy PID, to solve the weakness of traditional control and brin...

Construction accidents that involve cranes often relate to struck-by incidents, when the crane or its load is in too close contact with personnel, objects, and/or other equipment. In these incidents, limited or poor visibility of resources in the surrounding work space is often the cause of the problem. The result is often the death, serious injury of worker(s), and/or significant collateral da...

As an example of a spatial manipulator with large work space a 3-DOF overhead crane is considered. A nonlinear model of the overhead crane, including drive dynamics, is derived. The drives of trolley and winch are controlled by velocity controllers. Therefore the dynamics of the drives can be approximated and thus included into the model description. The states of the system are parameterized b...

Mobile cranes have been used extensively as essential equipment at construction sites. The productivity improvement of the mobile crane affects overall project. Hence, various studies conducted regarding operation planning. However, on solving RCP (the repositioning problem) are insufficient. This article presents a reposition route planning optimization method (RPOS) that minimizes total opera...

When suspended payloads are moved with an overhead crane, pendulum like oscillations are naturally introduced. This presents a problem any time a crane is used, especially when expensive and/or delicate objects are moved, when moving in a cluttered and/or hazardous environment, and when objects are to be placed in tight locations. For example, one nuclear waste-handling operation examined by th...

THIS DUAL biographical essay concerns two outstanding men of the seventeenth century, an Englishman and a Scotsman. They made their reputations in very different walks of life and in different countries. Both were proteges of royalty; Sir Francis Crane of James I and Charles I, and William Davison of Charles I and Queen Henrietta Maria, as well as of the kings of France and Poland, to whom he w...

gantry crane system becomes an interesting issue in the field of control technology development. In this paper, dynamic model of gantry crane is extracted using Lagrange method. This model has been linearized and weaknesses of state feedback control of this model is reviewed. To solve these problems, state feedback gain matrix is calculated using LQR method and results are fully investigated. F...