Repetitive Process Control of Laser Metal Deposition
Repetitive Process Control of Laser Metal Deposition
复制标题
激光金属沉积的重复过程控制
DOI：
10.1115/dscc2014-6173
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
R. Landers
中科院分区：
文献类型：
--
作者：
P. Sammons;D. Bristow;R. Landers
激光金属沉积(LMD)工艺是一种附加制造工艺，在该工艺中，激光和粉末材料源被用来逐层地制造功能金属部件。虽然流程通常由纯时间动态模型建模，但更恰当地将流程描述为具有两组动态流程的重复流程：一组在层内的位置演变，另一组在部分层内演变。因此，为了适当地控制LMD过程，使用捕捉主导的二维现象的LMD过程的模型并在过程控制中解决二维问题是有利的。利用LMD过程的空间域Hammerstein模型，研究了开环过程的稳定性。然后，在层域中利用误差反馈设计了稳定控制器。
The Laser Metal Deposition (LMD) process is an additive manufacturing process in which a laser and a powdered material source are used to build functional metal parts in a layer by layer fashion. While the process is usually modeled by purely temporal dynamic models, the process is more aptly described as a repetitive process with two sets of dynamic processes: one that evolves in position within the layer and one that evolves in part layer. Therefore, to properly control the LMD process, it is advantageous to use a model of the LMD process that captures the dominant two dimensional phenomena and to address the two-dimensionality in process control. Using an identified spatial-domain Hammerstein model of the LMD process, the open loop process stability is examined. Then, a stabilizing controller is designed using error feedback in the layer domain.© 2014 ASME