Aiming at the problems of obvious lag of temperature feedback signal and insufficient accuracy of control system model caused by the inherent time constant of thermocouple and complex application environment in hot-pressing welding process,the thermo-couple temperature dynamic compensation method and intelligent identification technology of temperature control system are studied.An improved sparrow search algorithm(ASSA)is proposed to search and optimize the thermocouple third-order dynamic compensation filter model by using the experimental data of water bath method.Based on dynamic compensator,the model of hot-pressing welding control system is established,and ASSA algorithm is used to identify the model parameters.The experimen-tal results show that the average time constant of the slow thermocouple after compensation is reduced from 160 ms to 59.7 ms,which effectively improves the dynamic characteristics of the thermocouple.The designed ASSA is helpful to accelerate the opti-mization of the model identification parameters of the control system,and the obtained model has high accuracy after simulation verification,which has certain guiding significance for the automatic control and optimization of hot-pressing welding.
Improved Sparrow Algorithmdynamic temperature compensationparameter identificationautomatic controlhot bar
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