Identification of aircraft gas turbine dynamics using frequency-domain techniques

This paper describes the estimation of parametric and nonparametric models of the fuel feed to shaft speed dynamics of a twin-shaft gas turbine engine , using frequency-domain techniques. Data gathered from practical testing o f the turbine are presented and shown to be of high quality. Accurate model s are then estimated at several points along the turbine operating curve. T he results of the parametric estimations are used to verify theoretical mod els derived from the thermodynamic relations of the gas turbine. (C) 2000 E lsevier Science Ltd. All rights reserved.