Patent ID: 8511621

Claim:
A device for piloting a craft, comprising: a piloting member connected to at least one member for driving the craft, an electromechanical support box on which said piloting member is mounted and guided in rotation by means of at least one pivot connection about an axis, the electromechanical support box comprising, for each pivot connection of the piloting member in relation to said electromechanical support box, at least one actuating motor of the piloting member in rotation about said pivot connection, each actuating motor being constituted of an electromagnetic actuator comprising: a movable armature equipped with at least one permanent magnet and associated with the piloting member such that said movable armature and piloting member are interdependent in position in relation to the movements of the piloting member about said at least one pivot connection, an electromagnetic circuit including: (i) an armature, called the fixed armature, arranged to allow the movable armature to move in an air gap zone opposite at least one surface portion of the fixed armature, a magnetic moment of the movable armature sweeping said at least one surface portion of the fixed armature when said piloting member is rotated, and (ii) at least one coil winding which is dependent in position on the fixed armature, said at least one coil winding being arranged so that the at least one coil winding could be connected to a source of direct electrical current, said electromagnetic circuit being arranged to generate electromagnetic torque on said movable armature in relation to the axis of said pivot connection, wherein for each pivot connection of the piloting member relative to said electromechanical support box: at least one permanent magnet of the movable armature of each electromagnetic actuator which magnetic moment sweeps at least one surface portion, called at least one swept surface portion, of the fixed armature when said piloting member is rotated about said pivot connection, has a magnetic moment that is parallel to the axis of said pivot connection, said at least one swept surface portion extends radially in relation to the axis of said pivot connection, said electromagnetic circuit is arranged to generate an electromagnetic return torque of said movable armature in relation to the axis of said pivot connection into a stable neutral position, at least in the absence of electrical supply to each winding.