| 摘要 |
An actuator ( 30 ) for actuating translation movement of a component ( 32 ) (e.g., a horizontal stabilizer) relative to a structure ( 34 ) (e.g., an aircraft's rear fuselage). The actuator ( 30 ) comprises a control-motion-providing assembly ( 40 ) having a drive path from a motion provider ( 52 ) to the component ( 32 ), a motion-permit-prevent assembly ( 42 ), and a sensing system ( 94 ) which senses a failure in the drive path. The motion-permit-prevent assembly ( 42 ) comprises a screw member ( 74 ), which is not part of the drive path, and a nut member ( 76 ). Upon detection drive-path failure by the sensing system ( 94 ), the motion-permit-prevent assembly ( 42 ) converts from a motion-permitting mode (whereat relative rotation between the screw-nut members ( 74/76 ) is permitted) to a motion-preventing mode (whereat relative rotation of the screw-nut members ( 74/76 ) is prevented). In the motion-preventing mode, the component ( 32 ) is locked or immobilized.
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