A temperature control method for electroplating bath solution using fuzzy PID self correction
The automatic temperature control process of electroplating bath is a typical chaotic process,and there are obvious nonlinear fluctuations in the process of temperature acquisition.Under the interfer-ence of chaotic and nonlinear characteristics,the typical PID control algorithm leads to problems such as low control accuracy,poor stability and robustness.In addition,in order to solve the nonlinear prob-lem,the PID algorithm needs cyclic iterative calculation,which has the problem of control time delay.Based on fuzzy control,an automatic control method of electroplating bath temperature based on fuzzy PID is proposed.The method designs the temperature data acquisition structure,then integrates moving average filtering and temperature correction algorithm into it for real-time temperature data acquisition of electroplating bath solution.Then the collected temperature data is used as the input of the fuzzy PID controller.Using fuzzy control rules and introducing correction factors,the automatic control of electro-plating bath temperature is realized.Considering the time-delay characteristics of electroplating bath,the rough prediction reference model is added to the controller to suppress the characteristics and im-prove the control performance.Finally,the experimental results show that the proposed method is ad-vanced.The experimental results demonstrate that the proposed method exhibits high precision and effi-ciency in control,effectively reducing overshooting and fluctuations,and yielding positive results in application.
fuzzy controlPID algorithmmodifying factorvirtual instrument temperature detectiondelay characteristic suppression
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