Experiment Research For Vibration Control System Of Continuous Casting Mold Driven By Servomotor

The continuous casting driven by electro-hydraulic servo is usual, which is more complex, investment, and vibration isn't often synchronized, and usually stops The AC servomotor, which avoiding the lack of devices electro-hydraulic servo-driven, is simple, flexible in control and easy in maintenance, and can improve the surface quality of casting and lower the energy and material consumption, therefore, it is hopeful to apply in the field in continuous casting.In this paper, AC servomotor control technology is applied and the continuous casting mold control system driven by servomotor to realize non-sinusoidal vibration is taken as the background, the design of control algorithms and experimental research have been done, which have great theoretical and practical value.Firstly, the model of AC permanent magnetic synchronous servomotor is established through the application of vector control theory, all these work laid a solid theory foundation for the analysis of control strategy research, which provides a theoretical basis for the precise control of servomotor.Secondly, by the mathematical model of motor and considering together the influences of lumped uncertainties including parameter variations and external force disturbances in operation, an upper bound of the uncertainty is estimated adaptively. And then, an adaptive backstepping sliding mode controller is designed for position servo tracking, and a sigmoid function instead of a sign function is used to weaken the chattering. Finally, the simulation results show that the proposed controller can restrain parameter uncertainty and outside load force disturbance effectively, and make the system have good tracking performance.Thirdly, build the non-sinusoidal vibration electric control system of continuous casting mold driven by servomotor. In the system realization, take the Yaskawa AC servomotor with power to drive the casting mold, and select the Rockwell's CompactLogix PLC to carry out data collection and control output. Then the control signal of non-sinusoidal is output through the computer to the servomotor to drive the mold vibration table to achieve non-sinusoidal vibration.Finally, by programming with the PLC and RSView32 product by the Rockwell company, and then debugging and improve it, we realize the control of the system. Then the experiment results demonstrate that the AC servomotor is able to run in accordance with the sinusoidal curve, which means the AC servomotor can be served as the drive facility for continuous casting mold.