PERFORMANCE OF CROSS COUPLING CONTROLLERS FOR MOTION SYNCHRONIZATION OF ELECTROHYDRAULIC SERVO DRIVES FOR MOLD OSCILLATION

摘要

Electrohydraulic servo systems used for oscillating heavy molds of continuous casting machines frequently consist of two independently controlled and motion synchronized hydraulic servo cylinders. Significant disturbances resulting from components' wear or else may cause unacceptable non-synchronized motion and lead to sudden interruption of operation. To enhance the cylinders' motion synchronization a cross coupling controller with either a fuzzy logic or a proportional controller is proposed to be added to the control system used today.