A Feedforward Decoupling Dynamic Matrix Control of Heavy Oil Separated Process with Smith Predictive Compensation Principle

The actual refining processes exist delays and the control effect is sensitive to the disturbance and the model mismatch, which are likely the reasons of control failure. Motivated by this problem, a feedforward decoupling dynamic matrix control with Smith predictive compensation principle (SF-DMC) is proposed for the heavy oil separated process. In the aspect of algorithm, the dynamic matrix control (DMC) is combined with the Smith predictive principle to compensate the delays and the influence of disturbance. Based on the model analysis, the primary interaction relationships between the manipulated variables and the controlled variables are reserved, and the minor interaction relationships of the manipulated variables and the controlled variables are introduced as feedforward to improve the control performance. Finally, the double-input and double-output classical heavy oil fractionation tower model is used to confirm the effectiveness of the proposed method.