Tingginya waktu downtime mesin crane di salah satu perusahaan manufaktur produsen baja billet menyebabkan terganggunya kelancaran proses produksi. Untuk mengatasi hal ini serta untuk mencapai kestabilan performa crane, maka perlu adanya tindakan perawatan yang intensif pada setiap komponen crane. Metode Reliability Centered Maintenance (RCM), digunakan mengetahui interval dan dampak positif dil...

This paper proposes a simple but efficient technique to control 3D overhead crane. Load must track a desired path and not sway more than a reasonable range.The proposed method uses PID control for trolley to track the desired path and fuzzy control compensation to eliminate the load swing. Only the projection of swing angle is applied to design the fuzzy controller. No plant information of cran...

Invasive plants continue to spread in riparian ecosystems, causing both ecological and economic damage. This research investigated the impacts of common reed, purple loosestrife, riparian shrubland, and riparian woodlands on the quality and quantity of sandhill crane roosting habitat in the central Platte River, Nebraska, using a discrete choice model. A more detailed investigation of the impac...

Requirements of modern cranes and another heavy-duty material handling systems result in demand for sophisticated crane control and automation systems capable of handling loads fast and reliable connection to the particular information systems. These systems continuously provide up-dated information about containers moves and crane status. The total function is built up of a number of distinct ...

The behavior of many mechanical systems, such as overhead cranes, can be predicted through intuitive observation of their motion under various forces. Mathematical modeling of an overhead crane shows that it is highly coupled. Nonetheless, it is surprisingly easy for an experienced crane operator to drive payloads to target positions with minimal cable swing. This observation naturally promotes...

Due to the central role of cranes in construction operations, specialists in the construction industries have cooperated in the development of structured methods and software to help select the best crane type in construction sites. Crane selection is a time consuming process which needs extensive data exploitation. Moderately few systems have been developed to aid in selecting cranes and in se...

BACKGROUND In this study, the measurement of job stress of electric overhead traveling crane operators and quantification of the effects of operator and workplace characteristics on job stress were assessed. METHODS Job stress was measured on five subscales: employee empowerment, role overload, role ambiguity, rule violation, and job hazard. The characteristics of the operators that were stud...

Rail-rail transshipment yards are an emerging and more e cient alternative to traditional shunting yards. Instead of a time-consuming reshu ing of railcars via shunting hills, in these modern yards, huge gantry cranes tranship containers between di erent freight trains. As multiple cranes process the trains in parallel, it is an important operational task to avoid interferences among cranes. To...

Open-sea ship-to-ship transfer operation is an alternative way to avoid port congestion. This process involves a relatively small vessel which transports containers between the harbour and a large cargo ship equipped with a container crane. However, the presence of disturbances and uncertainties caused by harsh open-sea conditions can produce an excessive sway to the hoisting ropes of the crane...

This report concludes that there is great scope for expansion of the simulation facilities so far developed. In particular, it is recognised that training and competency testing of teams of personnel such as the banksman and supply ship's master could be integrated into crane simulator training scenarios and that this approach offers great potential for reducing the number of crane related acci...