Feedforward and Feedback Compound Control of Vibration Displacement for a Continuous Casting Mold Driven by a Servo Motor

In view of the fact that the vibration displacement system of continuous casting mold driven by a servo motor requires the motor rotate in a certain fixed direction, a compound control scheme combining feedforward and feedback control is proposed in this paper. In controller designing, there are mai...

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Bibliographic Details
Published in:International journal of control, automation, and systems 2020, Automation, and Systems, 18(12), , pp.3218-3228
Main Authors: Li, Qiang, Fang, Yi-ming, Li, Jian-xiong, Zhang, Wen-jian
Format: Article
Language:English
Subjects:
Algorithms
Constraint modelling
Continuous casting
Control
Control algorithms
Control methods
Control systems design
Control theory
Control Theory and Applications
Controllers
Engineering
Feedback control
Feedforward control
Machining
Mechatronics
Molds
Proportional integral
Repetitive control
Robotics
Servomotors
Tracking control
Uncertainty
Vibration
제어계측공학
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Summary:In view of the fact that the vibration displacement system of continuous casting mold driven by a servo motor requires the motor rotate in a certain fixed direction, a compound control scheme combining feedforward and feedback control is proposed in this paper. In controller designing, there are mainly two issues to be considered: i) constraint condition that the servo motor rotates in a fixed direction while the mold vibrates in a periodic form. ii) uncertainties caused by time-varying load and mechanical factors, such as mechanical zero initial deviation and machining precision. As to the system uncertainties and the periodic vibration displacement of mold, proportional-integral (PI) controller combined with the repetitive control method are used to realize displacement tracking and improve the tracking performance. A feedforward control algorithm consisting of the reference mold displacement and its first derivative is adopted to solve the constraint condition. Finally, some simulation results show the feasibility of the proposed algorithm for the constraint condition and system uncertainties. Additionally, a typical industry mold vibration system driven by a servo motor is conducted to show the effectiveness of the proposed control scheme.
ISSN:1598-6446
2005-4092
DOI:10.1007/s12555-019-0998-0