Thrust Models Based on Operational Flight Data Used in Parameter Estimation for Safety Analyses

Based on available operational flight data of a Boeing 737-300 with CFM56-3 engines, four different thrust models are developed in MATLAB. The model development is supported by the software GasTurb which is able to compute operating lines for engine components based on a design point. The results are used for the generation of lookup tables. The computed thrust is then utilized in parameter estimation for the landing phase from touchdown to a calibrated airspeed of 50kts. Here, zero drag coefficients, spoiler drag coefficients and a braking coefficient are estimated for about 1500 flights using the Output Error Method combined with the Gauss-Newton algorithm.     «

Based on available operational flight data of a Boeing 737-300 with CFM56-3 engines, four different thrust models are developed in MATLAB. The model development is supported by the software GasTurb which is able to compute operating lines for engine components based on a design point. The results are used for the generation of lookup tables. The computed thrust is then utilized in parameter estimation for the landing phase from touchdown to a calibrated airspeed of...     »