A neuroendocrine regulation principle-based intelligent cooperative decoupling controller for PANCF coagulation bath

The production of polyacrylonitrile carbon fiber (PANCF) includes a set of industrial processes with high complexity. One key process is the coagulation process for PAN as-spun fiber in the coagulation bath. This process has a lot of variables coupling with each other, which increases the difficulty of acquiring satisfactory control performance. In this paper, an intelligent cooperative decoupling controller (ICDC) based on the neuroendocrine regulation principle of human body is proposed and then applied to the coagulation bath in the PANCF production. The control signals are generated, independently processed and integrated by the components of the ICDC according to the neuroendocrine regulation principle, and finally sent to the plant. Two important variables, the liquid-level and the concentration of the bath which couple with each other are considered. Simulation results demonstrate that the ICDC can rapidly response to the variation of control variable, completely eliminate the coupling influence and make smooth and non-overshoot regulation, which has a better performance than that of the conventional control schemes.