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PitchMotorSizing:

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   Determine size of pitch motor based on driving acceleration
   requirements. The pitching moment aerodynamic effect is not
   explicitly considered.

   We assume a sinusoidal function for the desired pitching function.

   If DeltPitch = -Delta*sin(omega*t) is the desired pitching profile as a
   function of time,

   d/dt (DeltPitch) = -Delta*omega*cos(omega*t), and

   d^2/dt^2 (DeltPitch) = Delta*Omega^2*sin(omega*t).
--------------------------------------------------------------------------
   Form:
   [maxSpd, maxAngAcc] = PitchMotorSizing( omega, delta, fac )
--------------------------------------------------------------------------

   ------
   Inputs
   ------
   omega       (1,1)  Maximum rotor speed (rad)
   delta       (1,1)  Magnitude of sinusoidal pitching (rad)
   fac         (1,1)  Design limit factor

   -------
   Outputs
   -------
   maxSpd      (1,1)  Maximum speed
   maxAngAcc   (1,1)  Maximum angular acceleration

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