Two-degree-of-freedom IMC based on multi-model and application to de-hexane column

In order to solve the control of de-hexane column, the two-degree-of-freedom internal model control (IMC) based on multi-model method is presented. This method uses the multi-model to simulate actual object´s complex and changeable condition, and uses the two-degree-of-freedom internal model control to ensure the control performance of de-hexane column. The two-degree-of-freedom IMC can tune tracking performance and anti-jamming capability more flexibly. The practical application on the de-hexane column shows that the control scheme is practical and effective.