Introduction to Thermodynamic Systems Modelling

The first problem for a control or systems engineer in front of a process to control is to obtain a precise and easily manipulated model with predictions corresponding to the real observation. The different mathematical equations describing a system and to predict its behaviour is called a mathematical model. The mathematical model can also be defined as an operator giving the relation between input and output signals. It is important to note that input and output variables refer to the model and not to the physical system: for instance the steam flow out of a boiler can well represent the input of a model.