Design And Modeling On Automatic Feeding Control System Of Angle Sorter

The automatic feeding system of angle sorter is a subsystem of automatic angle sorter. Electromagnetic vibrating feeder is a common device of automatic feeding in automatic processing and assembling systems.With features such as high feeding efficiency, good orientation, high liability, simple mechanical structure,good generality and easy adjustment of speed, it plays a vital role in the feeding system of automatic angle sorter.This paper studies the automatic feeding system of angle sorters from the following two parts:The first part is the design of the automatic feeding control system, which consists of the drive module, the MCU control circuit, the voltage detection circuit, the frequency detection circuit, the protection circuit and the fiber optic sensor circuit etc.The MCU control circuit is the core of the control system, producing SPWM to control the drive and generate VVVF half-wave AC by algorithms.The voltage and frequency detection circuits detect the drive generating the AC and feedback the detected signals to the MCU, realizing the inner-loop control of the automatic feeding system.The protection circuit is used to prevent excessive current in order to ensure the safety of the drive.The fiber optic sensor detects the feeding speed, and sends the detecting signal back to the MCU, realizing the outer-loop control of the automatic feeding system.With a double loop control system,a stable feeding speed is guaranteed.In the other part, the mathematical model of feeding speed in electromagnetic vibration feeder is deducted theoretically. Based on the vibration theory and the analysis of movement theory, the model of average feeding speed is established, providing that the exciting frequency is around the system natural frequency.This model contains electromagnetic coefficient, friction coefficient, damping coefficient and other unknowns, which are identified through self-adaptive Genetic Algorithm.Simulations and experiments show that the actual average speed measured is close to the theoretical calculation and the digital controller used performs well, thus the purpose of this paper is realized.