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1 Research Bulletin / Warsaw University of Technology, Institute of Aeronautics and Applied Mechanics

1 2001

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A new method for agile aircraft stability evaluation

Pietrucha J., Sibilski K.

Research Bulletin / Warsaw University of Technology, Institute of Aeronautics and Applied Mechanics

2001

nr 12

39-44

In the paper a study of high angle of attack dynamics of an advanced trainer aircraft is presented. This dynamics is non-linear, therefore the theory of dynamical system (TDS) approach can be useful in the analysis. The equations of motion used in this investigation assume a rigid aircraft with movable control surfaces. Aerodynamic forces and moments found in equations of motion are valid for a region of higher angles of attack including deep stall phenomena. Results obtained from the TDS are used to predict the nature of the instabilities caused by the bifurcations and the response of the aircraft after a bifurcation is studied. Based data for the MiG29 fighter aircraft are used.