基于自适应的锌冶炼过程中pH参数控制的研究

pH Process Control Research in Zinc Metallurgy Based on Adaptive Regulator

根据锌冶炼pH控制的特点采用模型参考自适应的广义时变系统控制策略,利用控制系统响应特性以一定的规律自动调整调节器的PID参数,当工况、干扰或负载改变时,通过给定值扰动可得到对象输出波形,由波形辨识器获得特征参数向量,然后由专家系统求得PID调节器参数更新值,使可调系统的输出响应波形逐步趋于理想的响应波形。该系统能够提高浸出过程中pH的控制精度,并与传统的PID控制进行了实验仿真及各级中、酸性浸出槽pH现场控制的实时曲线比较。

According to the characteristic of pH controls in zinc metallurgy, using model reference self-adaptive generalized time-varying control system strategy, using the response characteristics of control system that it has automatically adjust regulator of the PID parameters,when the working conditions, interference or load changes, the given value of perturbation can obtain target out- put waveform, by the waveform identification device can obtain characteristic vector parameters, and then obtained updates value of PID regulator parameters by the expert system, so that adjustable system output response waveform gradually become the ideal re- sponse waveform. This paper used nonlinear PID controlling for pH process controlling in the wet zinc metallurgy in order to in- crease pH controlling precision. The paper compared it with traditional PID controlling based on experiment simulation and on real- time curve of pH control at all leaching vat.