A Decoupling Control Model on Perturbation Method for Twin-Roll Casting Magnesium Alloy Sheet

Wenyu Zhang¹，Dongying Ju²，Hongyang Zhao²，Xiaodong Hu²，Yao Yao³，Yujun Zhang¹

1. School of Software,University of Science and Technology Liaoning2. School of Materials and Metallurgy,University of Science and Technology Liaoning3. School of Mechanical Engineering and Automation,University of Science and Technology Liaoning

摘 要：To better understand the twin-roll casting process,based on the analysis of the solidification phenomenon,the geometry shape of the molten metal pool,the continuity of metal and the balance of energy and momentum,five critical partial equations were established separately including the equations of pool level,solidification process,roll separating force,roll gap and casting speed.Meanwhile,to obtain a uniform sheet thickness and keep a constant roll separating force,a decoupling control model was built on the perturbation method to eliminate the interference of process parameters.The simulation results show that the control model is valuable to quickly and accurately determine the control parameters.Moreover,Mg alloy sheets with high quality were cast by applying this model.

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