scholarly journals Mathematical modeling of resonant linear vibratory conveyor with electromagnetic excitation: simulations and experimental results

2017 ◽  
Vol 41 ◽  
pp. 1-24 ◽  
Author(s):  
Željko V. Despotović ◽  
Djordje Urukalo ◽  
Milan R. Lečić ◽  
Aleksandar Ćosić
Keyword(s):  
Mathematical Modeling ◽  
Experimental Results ◽  
Electromagnetic Excitation ◽  
Vibratory Conveyor

Vibratory Feeding by Nonsinusoidal Vibration—Optimum Wave Form

1985 ◽  
Vol 107 (2) ◽  
pp. 188-195 ◽  
Author(s):  
S. Okabe ◽  
Y. Kamiya ◽  
K. Tsujikado ◽  
Y. Yokoyama
Keyword(s):  
Experimental Results ◽  
Wave Form ◽  
Velocity Wave ◽  
The Mean ◽  
Straight Lines ◽  
Vibratory Conveyor ◽  
Theoretical Results ◽  
Vibratory Feeding

This paper presents the conveying velocity on a vibratory conveyor whose track is vibrated by nonsinusoidal vibration. The velocity wave form of the vibrating track is approximated by six straight lines, and five distortion factors of the wave form are defined. Considering the modes of motion of the particle, the mean conveying velocity is calculated for various conditions. Referring to these results, the optimum wave form is clarified analytically. The theoretical results show that the mean conveying velocity is considerably larger than that of ordinary feeders if the proper conveying conditions are chosen. The theoretical results are confirmed by experimental results.

scholarly journals Hardware and Software Implementations of Measuring System for Resonant Electromagnetic Vibratory Conveyor

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Željko Despotović ◽  
Đorđe Urukalo ◽  
Aleksandar Ribić
Keyword(s):  
Industrial Process ◽  
Resonant Mode ◽  
Product Line ◽  
Measuring System ◽  
Electromagnetic Excitation ◽  
Efficient Operation ◽  
Testing And Measurement ◽  
Software Implementations ◽  
The Many ◽  
Vibratory Conveyor

Vibratory movements are one of the most ways for conveying and transportation of granular and particulate materials.Vibratory conveyors and feeders with electromagnetic excitation belong to a group of mechatronic devices that in an efficient wayprovides drive force and oscillations for this conveying. They have an important role in framework of the many industrial process inwhich are dominant the particulate materials: food processing, cement production, certain product line in steel industry,pharmaceutical industry, agriculture, etc. Therefore, they are representing a very important element of above mentioned technologicprocesses and production line. Especially, the vibratory conveyors and feeders that operate in the resonant mode are used in industrialapplications because of their energy efficiency increasing. The relatively small input energy of actuator drive causes intensivelyvibrations of load carry element (LCE) of vibratory conveyor. The intensity of the vibrations directly affects on gravimetric flow (massflow) and therefore on the productivity of vibratory conveyors. To ensure a reliable and energy-efficient operation of vibratoryconveyors, it is necessary to have a reliable and accurate measurement and testing of electrical and mechanical quantities. A hardwareand software implementation of the testing and measurement system of resonant vibratory conveyor with electromagnetic drive, andtheir corresponding data acquisition platform are presented in this paper. The experimental results obtained on a real laboratory setupof resonant vibratory conveyor are also shown.

Feeding Mathematical Modeling of Superalloy Vacuum-Electromagnetic Casting and its Application

2012 ◽  
Vol 629 ◽  
pp. 171-175
Author(s):  
Wen Zhong Jin ◽  
Su Fang Li ◽  
Wei Zhang
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
New Technology ◽  
Experimental Results ◽  
Electromagnetic Stirring ◽  
Shrinkage Cavity ◽  
Vacuum Casting ◽  
Electromagnetic Casting ◽  
Wide Range

The new technology of superalloy vacuum-electromagnetic casting was developed and the feeding mathematical model melt in vacuum-electromagnetic casting was established. The availability of mathematical model was approved by the experiments of the IN100 superalloy. The experimental results indicate that the feeding capacity of melt in vacuum casting can be greatly increased by imposing the 50Hz, 60A rotating electromagnetic stirring, which can decrease the central shrinkage cavity in superalloy ingots, so the quality of the superalloy ingots can be wide-range improved.

Mathematical Modeling of Electrochemical Deburring

2010 ◽  
Vol 126-128 ◽  
pp. 545-550 ◽  
Author(s):  
Wen Ji Xu ◽  
W. Wang ◽  
Xu Yue Wang ◽  
Gui Bing Pang
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Influencing Factors ◽  
Applied Voltage ◽  
Experimental Results ◽  
Electrode Gap ◽  
Workpiece Material ◽  
Burr Height ◽  
Object A ◽  
The Mathematical Model

The drilling burr is taken as the research object. A mathematical model of electrochemical deburring (ECD) is established and the effects of main influencing factors, such as inter-electrode gap, applied voltage and deburring time, on burr height have been analyzed. The results show that the deburring time increases with the increase of initial burr height, inter-electrode gap, with the decrease of volume of electrochemical equivalent of the workpiece material, conductivity of electrolyte and applied voltage. The deburring time for various burr heights can be predicted by the mathematical model. The calculated results obtained from the mathematical model are approximately consistent with the experimental results. The results show that initial burr height h0=0.722mm is removed, and the fillet radius R=0.211mm is obtained.

Modeling and Optimization on Yard Allocation Planning for Container Terminals

2010 ◽  
Vol 156-157 ◽  
pp. 540-546
Author(s):  
Lei Lin Yu ◽  
Zhi Qiang Lu ◽  
Li Feng Xi ◽  
Zhan Wan ◽  
Lin Li
Keyword(s):  
Mathematical Modeling ◽  
Heuristic Algorithms ◽  
Operational Efficiency ◽  
Experimental Results ◽  
Container Terminals ◽  
Modeling And Optimization ◽  
Container Logistics ◽  
Promising Tool ◽  
Container Shipment ◽  
Allocation Planning

The increase of container shipment causes higher demand on the seaport container terminals, container logistics and management. How to rationally allocate the limited space resources and how to improve operational efficiency, is an important subject for container terminals. In this paper, the mathematical modeling and optimization on yard allocation planning based on the mixed storage is proposed with an objective to balance the workload among different blocks and to minimize the delay of container ships. Two corresponding heuristic algorithms are developed to solve this problem. The experimental results show that the proposed algorithms are the promising tool for allocating blocks’ workload.

scholarly journals Mathematical modeling of ferrous sulfate oxidation in presence of air

2018 ◽  
Vol 210 ◽  
pp. 04043
Author(s):  
Juan Carlos Beltrán-Prieto ◽  
Karel Kolomazník
Keyword(s):  
Mathematical Modeling ◽  
Differential Equations ◽  
Ammonium Sulfate ◽  
Rate Constants ◽  
Ferrous Sulfate ◽  
Sulfate Solution ◽  
Experimental Results ◽  
Sulfate Salt ◽  
Ferric Ammonium ◽  
Gas Washing

In the present paper we studied the oxidation of ferrous sulfate salt with oxygen. ferric ammonium sulfate and ferrous sulfate were used to prepare standard solutions of Fe(III) and Fe(II) solutions. Oxidation experiments were carried out by mixing FeSO4·7 H2O in H2O. Air was supplied using a gas washing bottle in which air entered the bottle through the center tube, and exited into the bottom of the bottle. Samples were taken periodically and analyzed in the UV-Vis spectrophotometer. We consider that basic Fe(III) sulfate was one of the main compounds produced during the reaction and proposed a model to describe the process. We found solution to the differential equations that described the profile of FeSO4 and FwOHSO4 concentration in time and observed agreement between the experimental results and data predicted by the model. Moreover, we determined values of rate constants using the model and confirmed the determined values by means of experiments. This suggests that basic ferric sulfate was generated after aeration of ferrous sulfate solution.

Mathematical Modeling and Experimental Evaluation of the Stress in the Connecting Elements of the Rods at a Rotational-Impact Loading

2015 ◽  
Vol 770 ◽  
pp. 424-428
Author(s):  
Lev A. Saruev ◽  
Sergei S. Vasenin
Keyword(s):  
Mathematical Modeling ◽  
Impact Loading ◽  
Experimental Evaluation ◽  
Experimental Results ◽  
Threaded Joint ◽  
Tangential Stresses

The experimental results are presented for the research on stress in the connecting elements of the rods at a rotational-impact loading. The oscillograms are made demonstrating the power pulses and tangential stresses in the threaded joint.

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