Incidence, Sideslip, & Airspeed
Calculate incidence, sideslip, and airspeed
Aerospace Blockset / Flight Parameters
The Incidence, Sideslip, & Airspeed block calculates the angles between the velocity vector and the body, and also the total airspeed from the velocity components in the body-fixed coordinate frame. For the equations used in the calculation, see Algorithms.
Vb — Velocity of body
Velocity of the body, specified as a three-element vector, resolved into the body-fixed coordinate frame.
ɑ — Incidence angle
Incidence angle, returned as a scalar, in radians.
β — Sideslip angle
Sideslip angle, returned as a scalar, in radians.
V — Airspeed
Airspeed of the body, returned as a scalar.
To calculate the angles between the velocity vector and the body, and the total airspeed, the block uses these equations:
The block uses the
tan-1 formulation for β to
prevent division by
C/C++ Code Generation
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Version HistoryIntroduced before R2006a
R2022b: Updated to Reduce Divide by Zero Issues
The Incidence, Sideslip, & Airspeed block now reduces the potential for divide by zero issues caused by aircraft hovering without forward movement. In previous releases, hovering without forward movement might cause divide by zero issues.