Optimal Control for Zinc Electrowinning Process With Current Switching
Optimal Control for Zinc Electrowinning Process With Current Switching
复制标题
电流切换的锌电积过程优化控制
DOI：
10.1109/access.2017.2768068
复制
发表时间：
2017-01-01
期刊：
影响因子：
3.9
通讯作者：
Li, Fanbiao
中科院分区：
文献类型：
--
作者：
Yang, Chunhua;Deng, Shijun;Li, Fanbiao
研究了锌电解过程电流切换期间的最优控制问题。通过建立数学模型，揭示了锌电液工艺的全厂动态特性，建立了能耗模型，设定了不同电流下锌离子浓度和硫酸浓度的期望设定值。在此基础上，建立了锌电解过程中初始时间、终端时间和系统切换时间均为自由的最优控制问题。提出了一种基于时间尺度变换的控制参数化方法，将最优控制问题转化为多参数优化选择问题，并利用优化算法进行求解。通过对某湿法炼锌厂EW过程的实际应用，验证了该方法的有效性。
This paper is concerned with the optimal control problem for the zinc electrowinning (EW) process during the current switching period. A mathematical model is developed to reveal the dynamic characteristics of the whole plant of the zinc EW process and an energy consumption model is established to set the expected set points of the concentrations of the zinc ion and the sulfuric acid under different current. Furthermore, an optimal control problem is constructed in the light of free initial time, free terminal time, and fixed system switching time during the zinc EW process. A novel time-scaling transformation-based control parametrization method is introduced to transform the optimal control problem into a multiple parameters optimization selection problem, which can be effectively solved by the optimization algorithm. The applications on the EW process of a zinc hydrometallurgy plant demonstrate the validity of proposed method.