FS4Deployment:

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   S4 Sail simplified deployment dynamics from reference.
   Includes force and torque model which scale as area increases.

   Since version 7.
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   Form:
   [xDot] = FS4Deployment( t, x, force, torque, d )
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   ------
   Inputs
   ------
   t             (1,1)    Time
   x             (13,1)   The state vector [r;v;q;omega]
   force         (:)      Force structure
                           .totalBody   (3,1,2) Total torque on the vehicle
   torque        (:)      Torque structure
                           .totalBody   (3,1,2) Total torque on the vehicle
   d             (1,1)    Data structure

   -------
   Outputs
   -------
   xDot          (7+2n,1)  [qDot;omegaDot;aDot;aDDot]
   h             (3,1)     Inertial angular momentum in the body frame
   gIner         (3+n,3+n) Generalized inertia matrix

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  Reference: (Student Paper) Attitude Dynamics and Stability of Solar Sails
  During Deployment. LeFevre and Jha
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Children:

AeroUtils: Coord/QIToBDot
Sail: SailModeling/IDotS4