MAE142_L11_AeroForces.pdf

# MAE142_L11_AeroForces.pdf - Aerodynamic Forces and Moments...

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Aerodynamic Forces and Moments MAE 142 NASA Image Wind Axis Angle-of-Attack and Sideslip Aerodynamic Coefficients Data Formats Flight Simulation

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2 MAE 142 Angle-of-Attack and Sideslip z B Velocity Vector y B x B x W y W z W Angle-of-Attack Sideslip
3 MAE 142 Wind-to-Body Axis Transformation Two rotations are needed to transform from the wind axis into the body-fixed axis. Rotate about negative z-axis (3-axis) by the sideslip angle. Rotate about positive y-axis (2-axis) by the angle-of-attack. T W2B = [ cos 0 sin 0 1 0 sin 0 cos ][ cos sin 0 sin cos 0 0 0 1 ] T W2B = [ cos cos cos sin sin sin cos 0 sin cos sin sin cos ]

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4 MAE 142 Formulas for Angle-of-Attack and Sideslip Transforming the airspeed (vector) into body-axis coordinates establishes relationships involving angle-of-attack and sideslip. [ u v w ] = [ cos cos cos sin sin sin cos 0 sin cos sin sin cos ] [ V 0 0 ] v B = T W2B v
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• Fall '08
• Aliseda,A
• Aerodynamics, Computer simulation, sin  cos, sin  cos

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