Adibi - Amirkabir Tech. Univ. Tehran – IRAN
Baniardalani - Amirkabir Tech. Univ. Tehran – IRAN
Hesmatpanah - Amirkabir Tech. Univ. Tehran – IRAN
Firoozshahi - Amirkabir Tech. Univ. Tehran – IRAN

We have generated a model based on both theoretial as well as practical identification approaches for the main fuel heater in order to desing a suitable heater controller. The practical approaches involve several tests to determine the system timedelay, time-constant and allowed input signal amplitude leading to define a suitable input signal (Pseudo Random Binary Sequence (PRBS). Starting with the results signals for input and output data acquisation and manipulating these data will result in a possibility to have some idea about the model sets. Applying the recursive algorithms to these data,makes the system parameter estimation possible. By the comparison of all models, in fact we have to choose the one which will satisfy the validation criteria better than the others and has the least complexity.