Actuator servo-control monitoring method and device

Details Actuator servo-control monitoring method and device Actuator servo-control monitoring method and device

2011-02-22

2011-02-22

Lopez, F. Daniel (Department: 3745)

Power plants

Pressure fluid source and motor

Apparatus having means responsive to or ameliorating the...

Reexamination Certificate

active

07891180

ABSTRACT:
An actuator displacement servo-control for aircraft flight controls is assisted by a hydraulic circuit, configured to deliver a hydraulic failure indication. The servo-control is generated from an actuator position indication and a position set-point indication computed by a computation unit. An alarm phase is opened on detection of a servo-control operating error and is kept open as long as the error is present. During the alarm phase it is determined whether the actuator is in blocked or divergent states. If blocked, it is determined whether the duration of the alarm phase exceeds a value Tconf2; If divergent, it is determined whether the duration of the alarm phase exceeds a value Tconf1. When blocked and the duration of the alarm phase does not exceed Tconf2, it is determined whether the hydraulic circuit indicates a hydraulic failure.

REFERENCES:
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patent: 4542679 (1985-09-01), Murphy et al.
patent: 5319296 (1994-06-01), Patel
patent: 2006014997 (2006-02-01), None

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