A camera based feedback control strategy for the laser cladding process
A camera based feedback control strategy for the laser cladding process
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DOI：
10.1016/j.jmatprotec.2012.06.027
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发表时间：
2012-11-01
影响因子：
6.3
通讯作者：
Meijer, J.
中科院分区：
文献类型：
--
作者：
Hofman, J. T.;Pathiraj, B.;Meijer, J.
所开发的反馈控制系统调节激光功率，使得熔池的宽度保持在用户定义的参考值。该系统使用CMOS相机和软件算法来获得熔池的宽度。使用离散控制滤波器，确定满足参考熔池宽度所需的激光功率。控制滤波器增益被设计成使得包层过程的闭环带宽为几Hz的量级。因此，闭环系统将有效地补偿干扰（如散热器的变化和速度的变化）在一秒钟内。几个实验进行了研究控制器的性能。针对上述效果调整激光功率。在整个熔覆层上，所得到的稀释度和随之而来的硬度是恒定的。(C)2012爱思唯尔有限公司版权所有。
The developed feedback control system adjusts the laser power such that the width of the melt pool is kept at a user defined reference value. The system uses a CMOS camera and software algorithms to obtain the width of the melt pool. Using a discrete control filter, the required laser power to meet the reference melt pool width is determined. The control filter gain is designed such that the closed loop bandwidth of the cladding process is in the order of a few Hz. As a result, the closed loop system will effectively compensate for disturbances (such as heat sink changes and speed changes) within a second.Several experiments were performed to investigate the controller performance. The laser power was adjusted for the above effects. The resulting dilution and consequent hardness were constant over the entire clad layer. (C) 2012 Elsevier B.V. All rights reserved.