Control-Oriented Modeling and Repetitive Control in In-Layer and Cross-Layer Thermal Interactions in Selective Laser Sintering
Control-Oriented Modeling and Repetitive Control in In-Layer and Cross-Layer Thermal Interactions in Selective Laser Sintering
复制标题
选择性激光烧结中层内和跨层热相互作用的面向控制的建模和重复控制
DOI:
10.1115/1.4046367
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Chen, Xu
中科院分区:
文献类型:
--
作者:
Wang, Dan;Jiang, Tianyu;Chen, Xu
Although laser-based additive manufacturing (AM) has enabled unprecedented fabrication of complex parts directly from digital models, broader adoption of the technology remains challenged by insufficient reliability and in-process variations. In pursuit of assuring quality in the selective laser sintering (SLS) AM, this paper builds a modeling and control framework of the key thermodynamic interactions between the laser source and the materials to be processed. First, we develop a three-dimensional finite element simulation to understand the important features of the melt pool evolution for designing sensing and feedback algorithms. We explore how the temperature field is affected by hatch spacing and thermal properties that are temperature-dependent. Based on high-performance computer simulation and experimentation, we then validate the existence and effect of periodic disturbances induced by the repetitive in- and cross-layer thermomechanical interactions. From there, we identify the system model from the laser power to the melt pool width and build a repetitive control algorithm to greatly attenuate variations of the melt pool geometry.
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影响因子:
3.2
作者:
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通讯作者:
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DOI:
10.1016/j.ijmachtools.2017.04.007
发表时间:
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影响因子:
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4
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DOI:
10.1115/dscc2014-6173
发表时间:
2014
期刊:
IFAC Proceedings Volumes
影响因子:
--
作者:
P. Sammons;D. Bristow;R. Landers
通讯作者:
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