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此法是在过程中测量规范参数:焊接电流I、电弧电压U、焊接速度υ。通过改变其它可控制参数来补偿因外部干扰作用造成的这些参数中某一参数的改变。这时溶深H 由关系式确定H=K_1I~p_1U~q_1υ~r_1为了提高焊接质量,补充测量焊缝宽度(熔宽) B_1,同时,按照可控制参数由关系式B=K_2I~p_2U~q_2υ~r_2计算其宽度和按照焊缝宽度(熔宽)计算误差△B=B_H-B,确定不可控制干扰量,这时系数K_1和K_2按关系式K_1=((B_H)/B)~hK~2和K~2=[B_H/B]K′_2确定。式中K′_1和K′_2——出现不可控制干扰之前的系数值,外部干扰根据方程△I=I/p_1(h(△B)/B+q_1(△υ)/υ+r_1(△υ)/υ),补偿式中△I——电流与给定值的偏差;△U、△υ——电弧电压和焊接速度与给定值的偏差;△B=B_H-B——焊缝宽度(熔宽)测量值与计算值的偏差;h_1,p_1,q_1,r_1,p_2,q_2,r——固定系数。
This method is to measure the specification parameters in the process: welding current I, arc voltage U, welding speed υ. By changing other controllable parameters to compensate for the external interference caused by changes in one of these parameters. At this moment, the solution depth H is determined by the relation H = K_1I ~ p_1U ~ q_1υ ~ r_1 In order to improve the welding quality, the measurement of the weld width (weld width) B_1 is supplemented. At the same time, according to the controllable parameter, the relation B = K_2I ~ p_2U ~ q_2υ ~ r_2 to calculate the width and calculate the error ΔB = B_H-B according to the weld width (weld width), and then determine the uncontrollable interference. At this time, the coefficients K_1 and K_2 are calculated according to the relationship K_1 = B_H / B ~ 2 and K ~ 2 = [B_H / B] K’_2. In the formula, K’_1 and K’_2 are the coefficient values before uncontrollable disturbance. According to the equation, I = I / p_1 (h (ΔB) / B + q_1 (Δν) / υ + r_1 υ) / υ), compensation type △ I - deviation of the current and given value; △ U, △ υ - arc voltage and welding speed deviation from the given value; △ B = B_H-B - weld Width (width) measurements and calculated deviation; h_1, p_1, q_1, r_1, p_2, q_2, r - fixed coefficient.