Research ArticleNonlinear dynamic behaviors and control based on simulation of high-purity heat integrated air separation column

- A dynamic model of high-purity heat integrated air separation column (HIASC) plant is established.
- The nonlinear dynamic behaviors based on simulation of high-purity HIASC are studied.
- A generic model control using the square approximation model is proposed.
- An adaptive generic model control scheme is presented to update the model parameters.

In this paper, the dynamic behaviors on the basis of simulation for high-purity heat integrated air separation column (HIASC) are studied. A nonlinear generic model control (GMC) scheme is proposed based on the nonlinear behavior analyses of a HIASC process, and an adaptive generic model control (AGMC) scheme is further presented to correct the model parameters online. Related internal model control (IMC) scheme and multi-loop PID (M-PID) scheme are also developed as the comparative base. The comparative researches are carried out among these linear and nonlinear control schemes in detail. The simulation research results show that the proposed AGMC schemes present advantages in both servo control and regulatory control for the high-purity HIASC.