US 12,391,366 B1
Lead screw control actuation system
Ross J. Wendell, Medford, MA (US); Matthew M. Hall, Nashua, NH (US); and Elizabeth A. Deloia, Westford, MA (US)
Assigned to BAE Systems Information and Electronic Systems Integration Inc., Nashua, NH (US)
Filed by BAE SYSTEMS Information and Electronic Systems Integration Inc., Nashua, NH (US)
Filed on Jun. 12, 2024, as Appl. No. 18/741,399.
Int. Cl. B64C 13/28 (2006.01); B64C 39/12 (2006.01); B64U 10/00 (2023.01); F16H 37/12 (2006.01)
CPC B64C 13/28 (2013.01) [B64C 39/12 (2013.01); F16H 37/122 (2013.01); B64U 10/00 (2023.01)] 18 Claims
OG exemplary drawing
 
1. An actuation system for controlling a canard, the system comprising:
a motor;
a lead screw attached to the motor, the motor configured to rotate the lead screw, the lead screw configured to increase torque provided by the motor;
a nut comprising a threaded opening in a first face of the nut through which the lead screw is coupled such that the rotation of the lead screw causes the nut to move in a forward or reverse direction along a longitudinal axis of the lead screw, a direction of motion of the nut based on a direction of rotation of the lead screw;
the nut further comprising a slot in a second face of the nut, the slot oriented in a direction perpendicular to the direction of motion of the nut; and
a lever arm comprising a pin at a first end of the lever arm, the pin configured to slide in the slot of the nut to cause the lever arm to rotate in response to the motion of the nut, wherein a second end of the lever arm is coupled to a canard such that the lever arm rotation causes the canard to rotate;
wherein the nut comprises a groove in a third face of the nut, the third face of the nut opposite the second face of the nut, the groove configured to receive a dowel, the dowel fixed to a housing of the actuation system, the dowel configured to prevent rotation of the nut in response to the rotation of the lead screw.