MODELLING AND SIMULATION OF FREE-FLOWING MATERIAL WEIGHING IN WEIGH HOPPER

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Дата
2019
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Анотація
Topicality. Necessity of reducing ships’ downtime during grain transshipment from port elevators requires intensificationof handling operations. It can be provided not only by using transport mechanisms of greater capacity, but also by threadtransportlines operations automation, which will eliminate possible human operator errors. Creation of automatic controlsystems, in turn, requires development of mathematical and simulation models of thread-transport lines, an integral part ofwhich are weigh hoppers of periodic action.Objective. To create simulation model of weigh hopper operation, which reflects its properties as a control object.Method. Known differential and algebraic equations of weighing in weigh hopper are used. They include influence grainweight on its mechanical system as well as dynamic force which grain creates during falling. Simulation models forMatLab/Simulink were created on the basis of these equations.Results. Computer experiments with weigh hopper models which include simulation of different operating conditions wereplanned and carried out. Trends were obtained, which define effectiveness of its operation.Conclusions. Effectiveness of weighing process is defined by optimal combination of weigh hopper productivity and itsdynamic inaccuracy. To increase productivity weighing cycle must be reduced. However, this reduction is limited by time,which is necessary for damping of mechanical system oscillations.
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Бібліографічний опис
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