(1. 中南大學(xué) 冶金科學(xué)與工程系， 長沙 410083;
2. 鄭州信息工程學(xué)院 應(yīng)用數(shù)學(xué)系， 鄭州 450002；
3. 貴州鋁廠， 貴陽 550058)
摘 要: 利用斷電流法測定鋁電解陽極過電位，用擬牛頓法確定過電位衰減極化曲線方程中的各項(xiàng)參數(shù)，結(jié)果表明采用擬牛頓法往往使得曲線的模擬結(jié)果與實(shí)驗(yàn)結(jié)果有一定偏差，從而影響其預(yù)測功能。采用實(shí)數(shù)編碼方法，把遺傳算法應(yīng)用于過電位衰減曲線方程中的參數(shù)辨識，通過在遺傳進(jìn)化過程中動態(tài)改變交叉率和變異率以增加其全局尋優(yōu)的機(jī)會，結(jié)果表明模擬曲線和實(shí)驗(yàn)結(jié)果相符很好。
關(guān)鍵字: 鋁電解； 斷電流法； 擬牛頓法； 遺傳算法； 過電位
（1. Department of Metallurgy Science and Engineering, Central South University,Changsha 410083, P.R.China;
2. Department of Applied Mathematics, Zhengzhou College of Information Engineering, Zhengzhou 450002, P.R.China;
3. Guizhou Aluminum Factory， Guiyang 550058, P.R.China）
Abstract:Anodic overpotential was measured by current interrupt technique, and the quasiNewton method was used to determine the coefficient of overpotential decay equation . The result indicated that a little difference exists between the fit data and the experiment data, which affects its predicting accuracy. So the genetic algorithm was introduced to recognize the parameters. Using real number coding, this algorithm was devised to change recombination rate and mutation rate dynamically, therefore more chance can be obtained to optimize the parameters overall situation. The simulated curve can be well agreed with the experiment result.
Key words: aluminum electrolysis; current interrupt technique; quasiNewton method; genetic algorithm; overpotential
