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The GMAW-S process occurs from sequences of arcing and short-circuit welding periods. For modeling purposes, many researchers believe that the metal transfer occurs only in the period of short circuit (consideration to be taken into account in the present work), in which the link between the electrode and the welding pool is generated through a liquid metal bridge. From this exact moment, it can be...
This paper presents an adaptive identification approach based on extreme learning machine (ELM), single hidden layer feedfoward neural networks, high-order neural networks (HONN), and adaptive control theory. Drawing on Lyapunov-like analysis employing Barbalat’s Lemma, the designed identifiers ensure the boundedness of all associated approximation errors and convergence of the residual state error,...
This paper presents both the hardware implementation and the simulation of a Kahnan filter algorithm for detecting "on-line" discontinuities in a Tungsten Inert Gas (TIG) welding process, by using an infrared sensor. For the hardware implementation of the Kaiman filter a Field Programmable Gate Array (FPGA) with 32 bit floating point arithmetic was used. The data used for the simulation...
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