According to the difference between the quality measurement result of the powder and the grade value, the exact weight of the component to be adjusted is calculated in the silo, and the target value is used for feeding. In the process of feeding, the bin material is vibrated to the hopper scale by vibrating Feeder for dynamic weighing. When the material weight reaches the required value, the vibration feed is stopped, the material in the hopper scale is lowered to the screw machine, and the screw transfers the silo material to the feeding tube, and the silo material falls freely into the silo body. Logic control, in order to prevent inertial blanking after shutdown, the error is eliminated by implant advance adjustment.

The feeder vibrates on the high bin, and the material falls to the hopper scale to be weighed. According to the difference between the preset amount and the real-time weight of the powder composition, the system is designed using PID control algorithm, and the segmented PID algorithm is adopted to achieve rapidity and accuracy. After the vibration feeder stops vibrating, there is still the bin material falling, because the material added to the bin is the fine material with uniform particles, the fall amount can be measured. Therefore, the hysteresis effect of the material can be monitored, and the advance adjustment can be made according to the specific situation.

The input signal of the system includes the total weight of the powder, the required quantity of the powder grade, the analog value of the measurement result, and the digital value of the button indicator light during manual operation. After processing, output bin selection, control parameters of the vibration feeder, and communication values with subsequent inverters. Most silo controls are controlled by PLC. The above input and output, as well as communication, allow the feeding system to be integrated into the bin control system as a separate unit. The real-time signal of the weighing data of the hopper scale is transmitted to the controller, and the controller makes a difference against the required quantity of the grade, converts the quantity of the material to the output power, and transmits the power to the vibration feeder through the frequency converter. The proportional, integral and differential parameters are determined according to the experience of vibration feeder.