Abstract Controlling the gas metal arc welding (GMAW) process is investigated utilizing feedback linearization with heat input, detaching droplet diameter and melting rate as controlled variables while accounting for actuator saturation. The control algorithm is employed using a state space model with eight dynamic states. Stability and internal dynamics of the process are studied thoroughly. Sliding mode state observers are implemented to determine the arc current and contact tip to work piece distance as well as the stick out length (which constitute the internal states of the system). Several simulation reports are provided to demonstrate successful regulation and tracking of detaching droplet diameter, heat input rate and melting rate. Finally, simulations indicate that the method is capable of overcoming parametric uncertainty.

中文翻译：

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利用反馈线性化和滑模观测器控制 GMAW 过程中的传质和传热

摘要 利用反馈线性化与热输入、分离熔滴直径和熔化速率作为控制变量，同时考虑致动器饱和，研究了控制气体保护金属电弧焊 (GMAW) 过程。使用具有八个动态状态的状态空间模型来采用控制算法。对过程的稳定性和内部动态进行了彻底研究。滑动模式状态观测器用于确定电弧电流和接触尖端到工件的距离以及伸出长度（构成系统的内部状态）。提供了几个模拟报告来证明对分离液滴直径、热输入速率和熔化速率的成功调节和跟踪。最后，仿真表明该方法能够克服参数不确定性。