Fluid-powered thrust reverser actuation system speed control

An aircraft thrust reverser control system, comprising:

• a thrust reverser movable component;
• a fluid-powered drive mechanism coupled to the thrust reverser movable component and adapted to receive drive fluid, the fluid-powered drive mechanism responsive to the drive fluid to move the thrust reverser movable component at a movement speed;
• a fluid-powered control mechanism coupled to the fluid-powered drive mechanism and adapted to receive a control fluid, the fluid-powered control mechanism responsive to the control fluid to control the drive fluid to the fluid-powered drive mechanism;
• a pilot valve in fluid communication with the fluid-powered control mechanism and coupled to receive control signals, the pilot valve responsive to the control signals to controllably supply the control fluid to the fluid-powered control mechanism;
• and
• a control unit operable to determine thrust reverser movable component position and selectively supply the control signals to the pilot valve, to thereby control the drive fluid to the fluid-powered drive mechanism to:
• (i) move the thrust reverser movable component at a first movement speed and,
• (ii) when the thrust reverser movable component attains a predetermined position, move the thrust reverser movable component at a second movement speed, the second movement speed less than the first movement speed.