Projectile with steerable control surfaces and control method of the control surfaces of such a projectile

A projectile with incidence steerable control surfaces comprising at least two control surfaces, each control surface being rotatable with respect to the projectile around a pivot axis perpendicular to the longitudinal axis X of the projectile, wherein the projectile comprises:

• central means for controlling the control surfaces comprising at least a spherical shape, the center O of the spherical shape being on the longitudinal axis X, the spherical shape being arranged in a housing of the projectile,
• a control arm secured to the spherical shape and adapted to rotate the spherical shape at least around the pitch Y and yaw 2 axes of the projectile passing through the center O of the spherical shape,
• for each control surface, a transmission member cooperating with the spherical shape by a first side and with the control surface foot by a second side, wherein the transmission member is intended to transmit to the control surface the rotation movements of the spherical shape around the pivot axis of the control surface,
• means for positioning the arm adapted to position an end of the arm in a position determined with respect to an absolute frame RA centered on the longitudinal axis X of the projectile,