| 摘要 |
<p>A trailing edge control surface (12) is pivotal about a pivot axis (16) fixed relative to the vehicle and is deflected to create control forces, and a tab (24) is pivotally mounted to an aft end of the control surface. An aft end of a linkage (28) is connected to the tab spaced from the tab pivot axis (26), and the linkage extends forward to a forward end (22) that is coupled to fixed vehicle structure, such that deflection of the control surface causes a deflection of the tab as long as the forward end of the linkage does not lie in line with the control surface pivot axis. A gearing control actuator is coupled to the linkage and is operable to position the forward end of the linkage at selectively variable distances on one or the other side of the neutral position. An alternative control system includes a backup tab actuator for providing tab deflection upon failure of the actuator system that deflects the control surface such that the tab can be used for moving the control surface, or as a mini control surface by locking the control surface in a fixed position.</p> |
