Abstract
The paper presents initial results of implementation of an adaptive Smith controller developed and thoroughly investigated by simulation. The Smith predictor contains a PID regulator in the forward path The adaptive controller algorithm calculates the optimal parameters of the PID regulator on the basis of the estimated delay-free parameters and time delay of the process in every sampling instant. The experiments were performed on a distillation column separating ethanol-water mixture. The pilot plant has been equipped with analog instrumentation, alarm devices and a hierarchical computer control system of two levels. The adaptive control calculations have been solved by the help of the higher level computer. The experimental results of the top plate temperature control are illustrated by time functions drawn by digital plotter. Comparison of the two control methods shows that the adaptive Smith control overperforms the adaptive PID control.
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