Control Flow of the Ore Sand Making Machine

The ore is sent to the first sieve by the electromechanical feeder. The ore whose diameter is more than 25mm is sent to the sand making machine for sand making. Then the ore is sent to the second sieve. The ore whose diameter is more than 25mm ore will be sent to the sand making machine by the transmission belt. Since the changes of the size and hardness of the ore is very large, the given value of the electromechanical feeder must be low when there are large ores with high hardness. Otherwise, the sand making machine will automatically shut down due to overload. When the ore is small and fragile, the working efficiency of the sand making machine will be very low if the given value of the electromechanical feeder is not promptly increased.
In order to maintain a high and stable power output of the sand making machine, the feed speed must be appropriately controlled to compensate for the fire circumference change of the volume and the hardness of the ore. The original sand making machine is controlled by a PI controller. The fact has proved that the controller can not avoid the substantially change of the power output of sand making machine, which often cause automatic shutdown even equipment accidents. In order to avoid automatic overload shutdown, the given value must be lowered, which in turn will affect the economic efficiency. The experts of Henan Hongxing Mining Machinery use the self-tuning control scheme for minimum variance of the output power of sand making machine. In order to track the changes of volume and hardness of the ore in a timely manner, the experts estimate the system parameters by using recursive least squares parameter estimation algorithm with the forgetting factor. Then the estimated value is regarded as the true value of the system parameters to design the minimum variance self-tuning control law.
The theoretical studies for sand making have has more than a hundred years of history so far. Many scholars have raised some of the brilliant and extremely valuable inferences theories. However, these theories almost can not be directly applied to the actual sand making mechanical design or the determination of the operating parameters of the sand making system. The theories can be only regarded as the general reference. Therefore, the practical application still uses the empirical method design. Recently, some scholars have proposed the analytical methods for mechanisms of sand making from a completely different point from view with existing theory. These analytical methods will adapt to the actual production requirements to some extent.
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Karen Wu Control Flow of the Ore Sand Making Machine

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