A cable actuator comprising: • a frame; • a screw rotatably mounted on the frame and extending along a first axis (Oy); • a nut co-operating with the screw; • a first cable coupled to the nut and functionally connected to an output (16, 17, 22.4) of the actuator; • a second cable coupled to the nut and functionally connected to an output (22.4) of the actuator; and • a motor arranged to drive the screw in rotation; • the first cable being arranged to exert forces opposing the nut being driven in rotation by the screw so as to constitute anti-rotation means such that rotation of the screw under drive from the motor causes the nut to move along the screw; - the cable actuator also comprising: • means (23, 24, 44, 60, 63, 70, 76, 83) for determining the actual position of the nut relative to the frame, characterized in that the actuator also comprises: • means for comparing the actual position of the nut relative to the frame with a theoretical position for the nut relative to the frame in order to obtain a position deviation (δ ang4, δ lin4) of the nut; and • means for determining a force applied to the output (22.4) of the cable actuator as a function of the position deviation of the nut. • a frame; • a screw rotatably mounted on the frame and extending along a first axis (Oy); • a nut co-operating with the screw; • a first cable coupled to the nut and functionally connected to an output (16, 17, 22.4) of the actuator; • a second cable coupled to the nut and functionally connected to an output (22.4) of the actuator; and • a motor arranged to drive the screw in rotation; • the first cable being arranged to exert forces opposing the nut being driven in rotation by the screw so as to constitute anti-rotation means such that rotation of the screw under drive from the motor causes the nut to move along the screw; - the cable actuator also comprising: • means (23, 24, 44, 60, 63, 70, 76, 83) for determining the actual position of the nut relative to the frame, characterized in that the actuator also comprises: • means for comparing the actual position of the nut relative to the frame with a theoretical position for the nut relative to the frame in order to obtain a position deviation (δ ang4, δ lin4) of the nut; and • means for determining a force applied to the output (22.4) of the cable actuator as a function of the position deviation of the nut. - the cable actuator also comprising: • means (23, 24, 44, 60, 63, 70, 76, 83) for determining the actual position of the nut relative to the frame, characterized in that the actuator also comprises: • means for comparing the actual position of the nut relative to the frame with a theoretical position for the nut relative to the frame in order to obtain a position deviation (δ ang4, δ lin4) of the nut; and • means for determining a force applied to the output (22.4) of the cable actuator as a function of the position deviation of the nut. • means (23, 24, 44, 60, 63, 70, 76, 83) for determining the actual position of the nut relative to the frame, characterized in that the actuator also comprises: • means for comparing the actual position of the nut relative to the frame with a theoretical position for the nut relative to the frame in order to obtain a position deviation (δ ang4, δ lin4) of the nut; and • means for determining a force applied to the output (22.4) of the cable actuator as a function of the position deviation of the nut. • means for comparing the actual position of the nut relative to the frame with a theoretical position for the nut relative to the frame in order to obtain a position deviation (δ ang4, δ lin4) of the nut; and • means for determining a force applied to the output (22.4) of the cable actuator as a function of the position deviation of the nut.