Aeronautics and astronautics – Aircraft control – Automatic
Patent
1997-03-24
1999-12-21
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft control
Automatic
244195, 91361, B64C 1336
Patent
active
06003811&
ABSTRACT:
Aircraft flight path changes commanded by a pilot via the wheel, column and pedal (12) are converted to position sensor signals (14) and passed as the input to primary flight computer (26). The primary flight computer (26) converts these pilot inputs and the inputs from autopilot (25) into desired surface actuator commands and then transmits them to actuator control electronics (18). The actuator control electronics (18) also receives a position feedback signal, representative of the position of the aircraft control surface (42). The actuator control electronics (18) produces a control signal which is fed to the input of an actuator (32) which includes a hydraulic system (34). The actuator responds to control input signals to drive linkage (40) which then positions the control surface (42). A rate limiter (110) imposes maximum rate limits to the actuator input signal (30) to thereby reduce peak transient hydraulic fluid pressure in the hydraulic system (34) and corresponding return and pressure lines (36), (38) to specified maximum values.
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Barefoot Galen L.
Hamley James P.
The Boeing Company
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