Simulation Tests of Multidelay Observer-Based Compensation Including Feedforward Decoupling

Multidelay compensators are considered with dynamic decoupling. Response results are shown for tests of multidelay predictor control of a simulated (2×2)-interactive process of first order lags with deadtime. The process model originated in the literature as a dynamic model for a binary distillation column. The set-point response results confirm that very good decoupling is achieved under ideal conditions. Such conditions are defined when the model is a perfect match of the process. Also, load response results are shown for cases with and without process parameter changes. For these cases, response comparisons are made between the Smith predictor method and an "observer-based" scheme which incorporates additional controllers applied to the model. Interaction in the disturbance feedback path appears to be beneficial for the cases tested.