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Aimed at the problem of detection of pool edge for aluminum alloy MIG welding, a new method is adopted. The method is used to detect the pool edge of aluminum alloy MIG welding by applying the pulse coupled neural networks algorithm. The pulse coupled neural networks algorithm is introduced in this paper. The detection of pool edge for MIG welding pool is carried out with this algorithm by MATLAB...
Research work of wire extension control with Dual freedom PID controller in pulsed MIG welding process of aluminum alloy. In the condition of optimum parameters, the simulations were firstly completed by separately using Routine PID control and Dual freedom PID control, based on designing the wire speed of wire extension step response and gaining identification model. Based on the results of simulation...
In order to evaluate the stability of the process of aluminum alloy pulsed Metal Inert Gas(MIG) Arc welding, an approximate entropy analysis has been done on voltage signal in the process of aluminum alloy pulsed MIG welding. The calculation and comparison of the approximate entropy on voltage signal under different welding parameters, such as welding speeds, wire feed speeds, duty cycle and so on,...
A real-time synchronous acquisition and control system was designed to meet the requirements of measurement and control for pulsed MIG welding process of aluminum alloy using virtual instrument design software LabVIEW. Considering the characteristics of pulsed MIG welding, development efficiency and control response time, the mode of “data acquisition card+ PC+ real-time controller” was adopted and...
According to the stability problem of wire extension in aluminum alloy pulsed MIG welding, a rapid prototyping control platform using the xPC real-time target environment based on the sliding mode control theory was established, and then the real-time control on wire extension in aluminum alloy pulsed MIG welding was carry out with sliding mode controller. The results show that the sliding mode controller...
A new efficient welding method, Consumable DE-GMAW was proposed. According to the many problems occurred when the welding process is open-loop, such as instability of the welding process and a large welding spatter, etc. A real-time target hardware platform was built for consumable DE-GMAW based on xPC, and a rapid prototyping control system was also developed for consumable DE-GMAW with the Matlab/Simulink...
The calculations of the temperature fields, the residual stress distributions and the displacement distributions of welding process by using three-dimensional thermo-elastic-plastic FEM (finite element method) are time-consuming. Some high efficiency computational methods aiming at characteristics of welding process in welding process numerical simulation were proposed such as segmented moving heat...
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