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Robust sensing and control of the weld pool surface

机译:焊池表面的可靠检测和控制

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摘要

Gas tungsten arc welding is the primary process for precision joining. To develop a control system for this process, a novel sensor is proposed to measure the depth of the weld pool surface using a non-transferred arc. A flat surface is periodically established to provide a real-time reference. The main-arc-on period is selected as the system's input. Because of possible large variations/ranges in manufacturing conditions, an interval model control algorithm with updated intervals is adopted. To demonstrate the use of the proposed sensor and control algorithm, closed-loop experiments under different variations have been conducted. Circumferential butt welding of steel pipe has also been included as an application example.
机译:钨极气体保护焊是精密连接的主要过程。为了开发用于该过程的控制系统,提出了一种新颖的传感器,该传感器使用非转移弧来测量焊池表面的深度。定期建立平面以提供实时参考。选择主电弧开启期间作为系统的输入。由于制造条件可能存在较大的变化/范围,因此采用具有更新间隔的间隔模型控制算法。为了证明所提出的传感器和控制算法的使用,已经进行了不同变化下的闭环实验。应用实例还包括钢管的周向对焊。

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