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首页> 外文期刊>ISIJ international >Mold Oscillation Feedforward Control Algorithm for Sinusoidal Oscillation of Various Asymmetries
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Mold Oscillation Feedforward Control Algorithm for Sinusoidal Oscillation of Various Asymmetries

机译：各种不对称正弦振动的模具振动前馈控制算法

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摘要

A feedforward control algorithm for the mold oscillators of a continuous casting process is proposed for both sinusoidal and non-sinusoidal oscillations. As steel industries grow, processes allowing for faster continuous casting are required in order to keep up with production demands. To achieve a quicker, continuous casting process, while maintaining slab quality, requires mold oscillations that make use of improved powder consumption rate and reduced friction force. Recently, non-sinusoidal oscillations have been researched owing to their advantages in regards to lubrication and friction. There have been several mechanical approaches but no algorithmic approaches. In this paper, a feedforward control algorithm consisting of embedded input shape and feedforward velocity control algorithms is proposed. Although conventional feedback controls have been commercialized for technical applications, the input shape control algorithm can prevent the non-negligible phase delays or amplitude reduction problems caused by a slow response of systems. In addition, the proposed feedforward velocity control algorithm is derived from the relationship between the valve input and mold velocity, and it allows the mold to correctly follow the non-sinusoidal oscillation. To determine the feasibility of the proposed algorithm, a Matlab Simulink model is derived from the mathematical model. Additionally, 1/100 scale specimen of a typical industry mold oscillator is used. The tests on the specimen showed that the proposed feedforward control algorithm could achieve precise control for both sinusoidal and non-sinusoidal oscillations.
机译：针对正弦和非正弦振动，提出了一种连续铸造结晶器振动的前馈控制算法。随着钢铁工业的发展，需要一种允许更快连铸的工艺，以跟上生产需求。为了实现更快，连续的铸造过程，同时保持铸坯质量，需要通过增加粉末消耗率和减小摩擦力来实现结晶器振动。最近，由于非正弦振动在润滑和摩擦方面的优势，已经进行了研究。有几种机械方法，但没有算法方法。提出了一种由嵌入式输入形状和前馈速度控制算法组成的前馈控制算法。尽管常规的反馈控制已经针对技术应用进行了商业化，但是输入形状控制算法可以防止由于系统响应缓慢而引起的不可忽略的相位延迟或幅度减小问题。另外，所提出的前馈速度控制算法是从阀门输入与模具速度之间的关系得出的，它使模具能够正确地遵循非正弦振动。为了确定该算法的可行性，从数学模型中导出了Matlab Simulink模型。另外，使用了典型工业模具振荡器的1/100比例样品。在样品上的测试表明，所提出的前馈控制算法可以实现对正弦和非正弦振荡的精确控制。

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