کنترل نفوذ حرارت در روش های جوشکاری قوس با استفاده از تئوری دیفرانسیل صافی و فیلتر کالمن غیرخطی

Control of the heat diffusion in the welded metal is of primary importance for succeeding welding of high quality (the latter being a prerequisite for efficient ship building). The paper proposes a distributed parameter systems control method that is based on differential flatness theory for solving the problem of heat distribution control in the arcwelding process. Besides, it proposes a nonlinear filtering method, under the name Derivative- free nonlinear Kalman Filtering for reducing the number of real-time control measurements needed to implement the feedback control loop. The stability of the control method is confirmed analytically, while its efficiency is also evaluated through simulation experiments.