Simulation of Conveyor Speed Relay Control Systems

The paper considers possibilities of relay systems for the conveyor speed control. Computational procedures have been developed for simulating the relay speed control of a conveyor with and without a loading hopper with discrete representation of the incoming freight flow. Estimates of the sampling time of the incoming freight flow are obtained. The requirements for conveyor speed regulator simulator are developed. Examples of simulation using MathCAD are given. The average value of the speed, the hopper capacity and the rate of speed switching are taken as the criteria for the efficiency of regulation. It is shown that the average speed decreases most distinctly with two- and three-stage regulation. A further increase in the number of regulation stages slightly reduces the average speed, but significantly increases the rate of speed switching. Installing the loading hopper allows significant reducing the nominal conveyor capacity and the average speed. The results of the work can be used in the design of conveyor drives with a relay speed control systems

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