Aimed at the variable speed and real-time problems in stage boom machinery control, the practical problems of great error, bad real-time, difficult zero speed park in fixed speed control has been solved effectively by adaptive fuzzy PID control. Based on the characteristics of the stage boom operation, a combined configuration of lower acquisition module and upper controller are applied to the control system, the upper controller sends the running parameters to the lower controller through the industrial Ethernet. The lower controller calculates output by adaptive fuzzy PID and communicate with inverter through CAN bus, then variable speed control in stage boom control can ben achieved by variable frequency. Unique degree value encoder is used to feedback the real-time information to the lower controller. System testing results showed that the method could improve the control performance and realize the variable speed control and zero speed park of the stage boom machinery
PLC BASED ADAPTIVE FUZZY PID SPEED CONTROL OF DC BELT CONVEYOR SYSTEM