Optimal Control Strategy Research on Aluminum Electrolysis Fault Diagnosis System

摘要

Aluminum electrolysis system is a complex industrial process with nonlinear, multivariable, time-varying and large time delay .The mathematical model of it is very difficult to determine, as well as it has a large coupling between the control variable which with high energy consumption. Therefore, research on save power, improve the current efficiency and increase the output and quality of the aluminum electrolysis control system have been become the focus of public concern to be solved. In this paper, by adjusting the controller ? s control strategy at real-time, controlling the feeding time and feeding rate of alumina, as well as effectively making the alumina concentration is controlled in the range of ideal value, they can make the electrolytic cell at the best working condition. Experimental results showed that this method was effective, increased the current efficiency, improved the control performance, and it had a great significance to raise the output and quality of aluminum.