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Sliding Mode Observers for Plasma Signal Identification in Remote Laser Welding

机译:滑模观测器用于远程激光焊接中的等离子体信号识别

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In this paper, a model for the emission of a plasma signal during the zinc coated steel metal fusion phenomenon is proposed. Remote laser welding process and system identification of plasma signal based on the sliding mode observer are presented. The dynamic behaviour of the keyhole is captured using experimental data from the photodiode sensor. A multi-input single-output (MISO) model is designed, the equivalent injection signal using a unit vector sliding mode observer is applied to update the dynamic matrix coefficients. The variation in the model parameters due to process disturbances in the laser fusion phenomenon is captured by recursively updating the matrix parameters, using matrix forgetting factor approach. The simulation result shows an accurate estimation of plasma signal emitted during the laser welding process in the presence of process disturbances.
机译:本文提出了一种在镀锌钢板金属熔化现象期间等离子体信号发射的模型。提出了基于滑模观测器的远程激光焊接工艺及等离子体信号的系统识别。锁孔的动态行为是使用来自光电二极管传感器的实验数据来捕获的。设计了多输入单输出(MISO)模型,使用单位矢量滑模观测器的等效注入信号应用于更新动态矩阵系数。通过使用矩阵遗忘因子方法递归更新矩阵参数,可以捕获由于激光融合现象中的过程干扰而导致的模型参数变化。仿真结果表明,在存在工艺干扰的情况下,可以准确估算在激光焊接过程中发射的等离子体信号。

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