Partial similarity of twin spool gas turbine means that the high pressure rotor can be considered as a single spool gas turbine operating under a specifical circumstance

the high and low pressure turbines and exhaust nozzle are considered a single components of a combination.In formulation of a real time gas turbine model

this method reduces dimensions of the dynamic parameters of the model.Therefore

calculation speed and accuracy of the model are good enough for real time modeling.Thus the model is capable of microcomputer digital control of gas turbine and of real time estimation of mal functioned parameters in the gas turbine monitoring system.