LI Xiaoqing1, WANG Haijian2

 

(1.Hydraulic Workshop, Ma Jialiang of Zheneng coal industry Co., Ltd., Shuozhou 036000, China;

 

2.College of Mechanical Engineering, Liaoning Technical University, Fuxin 123000, China)

 

 

Abstract: Aiming at the problem of the coal mine air compressors′ pressure stability, the control method of air compressors was researched, the method of combination of fuzzy PID control and linkage control was used, the programmable controller PLC was used as the developing platform of the hardware, the air compressors′ constant pressure air supply control system was designed and researched based on fuzzy PID and linkage control, the fuzzy PID control key process of air compressors was researched, and the software of Matlab/Simulink was used to construct the air compressors′ fuzzy PID control system modeling, the three different operating conditions include the beginning, load surges and pressure set value change were simulated and analyzed. The results indicate that, the air compressors based on the fuzzy PID and the intelligent linkage control can be controled rapidly according to the pressure variation, the system has good dynamic and static performances, the stability of constant pressure air supply is ensured, the electric energy consumption in coal mine is saved greatly. the efficiency of coal production is improved.

 

Key words: air compressor; fuzzy PID; linkage control; constant pressure; Matlab/Simulink