For the heating and post-welding heat treatment of large-diameter thick-walled 12Cr2Mo1V steel,the medium-frequency induction heating method was adopted and the model-free adaptive control(MFAC)algorithm replacing the traditional PID algorithm was selected for temperature control.Firstly,the physical parameters of the workpiece were analyzed,and parameters such as heating frequency,coil current,and power configuration were calculated.Then,the obtained parameters were input into COMSOL software to simulate on-site conditions and perform magnetic-thermal coupled simulation analysis,validating the feasibility of the calculated data.Next,the MFAC architecture was constructed in the SIMULINK simulation platform and compared to the traditional PID method,and the two algorithms were actually applied to observe the heating effect in the field.The results show that when large workpieces are heated to the target temperature of 700 ℃,the temperature fluctuation is smaller,the stability is higher,and the uniformity is better.
medium frequency induction heating12Cr2Mo1V steelCOMSOL finite element simulationmodel-free adaptive control algorithm
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