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Aiming at the problems of easy fault diagnosis and difficult early warning of mine hoist, a parallel system architecture of hoist fault early warning based on big data is proposed, the structure of each subsystem of hoist is analyzed, and a parallel simulation system of hoist fault early warning is established; secondly, the Hadoop ecosystem of hoist is established on the virtual machine, and the massive data is mined by using clustering algorithm and association rule algorithm, so as to speed up the calculation speed and improve the reliability of early warning; finally, the safety state evaluation rules of hoist are proposed, and the system decision is made according to the fault early warning results. The experimental results show that it can achieve the purpose of fault prediction.

Hydraulic hoist is required to open and close the gate. In recent years, scholars have studied a lot of different types of hydraulic hoist, in which the double point hydraulic hoist is one of them. Double point crane hydraulic hoist mainly uses the hydraulic synchronous system. In this paper, the hydraulic synchronous system as the research object, through the electrohydraulic proportional speed control valve research, analysis of its working principle. Then, the traditional PID control method and the fuzzy PID control method are compared and analyzed. It is found that the fuzzy PID control ability is better than the traditional PID control method. Fuzzy PID realizes hydraulic synchronization by adjusting the electro-hydraulic ratio of speed control valve.

A gantry crane presents a control problem with ten state variables. The undamped swinging of the load has led earlier researchers to apply cumbersome control strategies. The essence of pragmatic control is gleaned from autopilot designs of half a century ago. The control is designed as a set of ‘nested loops’, where the innermost loop takes the form of a velocity loop wrapped around a motor to give crisp velocity control. Target values are derived from states in the outer loops, to be applied to a succession of inner loops. These target values are subjected to constraints. Thus in the case of the crane, the horizontal position of the load can be considered to be the two outermost variables. In this study, from the load position error, two target velocity components are calculated and subjected to limits. The velocity error leads in turn to a target acceleration of the load and subsequently, to the target displacement that takes place between the horizontal coordinates of the hoist and the load. In this paper, the pragmatic control technique is demonstrated with the aid of a JavaScript and MATLAB software programs using a state-space model.

The paper is aimed at safety improvement of nuclear power plants by monitoring the refueling process carried out by the fuel-handling machine. The article confirms the necessity to develop a monitoring system that prevents failures during refueling operations. It is shown that the development of the monitoring system should be preceded by the stage of monitoring the object current parameters in the process of multiple operations with fuel and absorbing rods. The schemes of diagnostic signals registration and approaches to their analysis are presented. The paper presents results of the current signals analysis of the main hoist drive of the refueling machine at Rostov NPP. The development of refueling operation portraits based on current parameters is demonstrated. The principal component method is applied to them for the purpose of clustering. The paper shows the possibility to control the refueling machine efforts when extracting fuel by presenting diagnostic signals from the main hoist drive in the principal component space. In general, the paper substantiates the prospects of developing a refueling monitoring system through current consumed by the main hoist drive of the refueling machine

Aiming at the instability problem of balance hoist in the loading process, this paper is to establish a dynamic simulation model of balance hoist by using ADAMS. Based on rigid-flexible coupling dynamics, flexible connecting link was modeled as Euler–Bernoulli beams. The stability and dynamic characteristics of two extreme working states were analyzed. The results showed that the vibration and elastic deformation of connecting link after loading have a great influence on the constraint force of each hinge and out-of-balance force, and caused slippage and instability of balance hoist, especially when the lifting weight of the balance hoist moved to the region around workspace. It can reduce the out-of-balance force and improve the stability of balance hoist to increase the stiffness of the connecting link properly, which will provide a better reference for the structure optimization and operational performance of balance hoist.

The turbine building is one of the main buildings in the experimental power plant (RDE). Turbine and condenser generators are the main components of the turbine building. The total weight of the generator and condenser is about 80 tons. It is estimated that the toughest parts of turbines and condensers are about 20 tons. The turbine building will be equipped with an overhead crane double girder. The benefits of cranes are as lifting equipment to assist the installation and maintenance of generators and condensers. The purpose of this paper is to design and analysis of the planned RDE turbine beam crane building. The method used is Load Resistance Factor Design or called LRFD methods. Some of the standards used include AISC Design Guide 7 second edition and CISC Crane Guide second edition. Based on the basic drawing of the turbine building design, the distance of the crane supporting column is 14 meters. It is planned that the total length of the girder crane is 13 meters. Weight hoist and trolley 2,950 kg and double girder 10,120 kg selected from one vendor crane product. The results of the calculations and checks show that the W shape with Cap Chanel W27x84 C15x33.9 is safe to used. Abdul Hafid1, Djati Salimi1, Ewitha2 and Sitti Hijraini Nur3

Aiming at the problem that the positioning accuracy of the motor is not high when the electric hoist vertical lifting industrial material is working, the PC + motion control card + digital AC servo motor positioning cost is too high. The system uses the STM32F103 core controller + incremental photoelectric encoder control scheme, which can locate the position of the material tray accurately. The test results show that the system has the characteristics of high positioning accuracy, stable operation and low cost, The average error is within 0.2mm, it has a certain guiding significance for industrial measurement, automatic control, electrical transmission and other fields of application.

The integrated circuit (IC) manufacturing industry is one of the biggest output industries in this century. The 300mm wafer fabs is the major fab size of this industry. The automatic material handling system (AMHS) has become one of the most concerned issues among semiconductor manufacturers. The major lot delivery of 300mm fabs is used overhead hoist transport (OHT). The traffic jams are happened frequently due to the wide variety of products and big amount of OHTs moving in the fabs. The purpose of this study is to enhance the delivery performance of automatic material handling and reduce the delay and waiting time of product transportation for both hot lots and normal lots. Therefore, this study proposes an effective OHT dispatching rule: preemptive stocker dispatching (PSD). Simulation experiments are conducted and one of the best differentiated preemptive rule, differentiated preemptive dispatching (DPD), is used for comparison. Compared with DPD, The results indicated that PSD rule can reduce average variable delivery time of normal lots by 13.15%, decreasing average variable delivery time of hot lots by 17.67%. Thus, the PSD rule can effectively reduce the delivery time and enhance productivity in 300 mm wafer fabs.