Advanced Control of Pipe Airflow in Aluminum Powder Atomizing and Fine Classifying Process

In the fine classifying process control of aluminum powder atomizing production, the pipe airflow is difficult to remain stable for a long time due to the pipes coupling perturbation, which affects mainly the aluminum powder classifying accuracy. An advanced control strategy is thus presented for the pipe airflow control of aluminum powder fine classifying process. Combining both better steady-state property of PID control and better dynamics of fuzzy control with the transient response setting and coordinated control, a fuzzy PID coordinated control method is suggested to make the pipe airflow stable in fine classifying process. It is observed that the pipes coupling effects are reduced, and some defects such as large overshoot, long setting time in using traditional PID control, are avoided. Simulation results demonstrate that the new control strategy is excellent at quick response, small overshoot, better steady-state property and satisfactory control effect.