Ensuring smooth tension is imperative to maintaining the quality of lithium battery coating; particularly, the precision of tension control within the unwinding system is paramount to ensuring high-quality outcomes in subsequent processes and product fabrication. This paper proposes a fuzzy sliding mode variable structure control strategy based on the tension control of the unwinding system to meet the stability requirements of tension in the lithium battery coater’s unwinding system. First, we establish a nonlinear time-varying dynamic model of the unwinding system by elucidating the operational principles of the lithium battery coater unwinding system. Second, leveraging the tension model of the unwinding system, we devise a fuzzy sliding mode variable structure controller specifically tailored for tension control, subsequently conducting a stability analysis of the system. Finally, the effectiveness of the proposed fuzzy sliding mode variable structure controller is validated through simulation tests. Experimental results demonstrate that the devised fuzzy sliding mode variable structure controller exhibits superior robustness compared to both traditional proportional–integral–derivative control and sliding mode variable structure control.
Jian Li, Pengbo He, Shifa Li, Huabei Wang, Kui He, "Research on Tension Control Strategy of Lithium Battery Coater Unwinding System based on Fuzzy Sliding Mode Variable Structure" in Journal of Imaging Science and Technology, 2025, pp 1 - 8, https://doi.org/10.2352/J.ImagingSci.Technol.2025.69.3.030413