在Matlab平台下,利用系统辨识方法中输出误差模型进行辨识建模,确定了氧化铝高压溶出温度模型。通过代数稳定判据验证了系统的稳定性。辨识结果表明,辨识所得二阶模型的阶跃响应曲线与现场采集的氧化铝高压溶出器在线温度记录曲线相符合,拟合度为86.27%;辨识模型是合理有效的,能为参数整定、优化控制提供模型依据,提高了系统的控制精度,提高了氧化铝溶出率,降低了生产能耗。 Under the Matlab platform, the output error model of the system identification method was used to identify and model the high temperature dissolution of alumina. The stability of the system is verified by the algebraic stability criterion. The identification results show that the step response curve of the second-order model is in good agreement with the on-line temperature record of the alumina high-pressure dissolver. The fitting degree is 86.27%. The identification model is reasonable and effective, Control to provide a model basis to improve the control accuracy of the system to improve the dissolution rate of alumina, reducing energy consumption.