Question

Difference between the model based system and a smith predictor

Answer 1

From a general point of view, if you create a predictive model of a process , you can predict the future behaviour of the process. Otherwise, if this predictive model is able to control the process, you have a model able to predict and control the behaviour of the process. That means your controller is able to send a feedback to the process (to your devices) in order to rectify the process if there are a deviation. Furthermore, if your physical process is not stable itself, with a predictive and control model (with a feedback) you can create a stable close-loop.