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    • Proportional Integral Differential Control of Large-Scale Digital Light Three-Dimensional Printing for Energetic Homogenization Based on Improved Slime Mold and an Interpolation Algorithm

    Lei Liu,Jian Li,Yanling Guo,Yangwei Wang

    JOURNAL OF MANUFACTURING PROCESSES（2024）

    Northeast Forestry Univ

    Cited 3|Views7
    Abstract
    In this study, the closed-loop self-control strategy was employed to solve the problem associated with the homogenization of large-scale digital light printing (DLP) splicing energy. First, a three-step operation, i.e., the interpolation of large-format ultraviolet printing, curve fitting, and proportional integral differential (PID) control of the printing format energy, was performed. Then, the interpolation algorithm and slime mold algorithm (SMA) were improved. The convergent speed of the SMA was optimized through an improved randomized walk process, and the Gaussian process was employed to improve the searchability of the SMA to optimize the PID parameters. Finally, the energy homogenization effect of the algorithms was investigated. The control accuracy of the improved algorithms was higher, and the homogenization effect was better. Experiments revealed that the method, can make the splicing energy uniform. Comparing the surface roughness and tensile strength, the tensile strength of double DLP with improved SMA is better than that of DLP with the interpolation algorithm.
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    Key words
    UV energetic control,Large-scale digital light printing,Proportional integral differential
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