Method and device for unlocking a door of an aircraft landing gear
AssigneeSafran Landing Systems
InventorJérôme Fraval
Life of this patent
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Abstract
A method for unlocking a door of an aircraft landing gear movably mounted between an open position and a closed position includes, during a first sequence of opening the door that is locked in the closed position by a first attachment housing and a second attachment housing, controlling a first unlocking actuator to deactivate the first attachment housing, waiting a first waiting time greater than a time necessary for the door to initiate a passage from the closed position to the open position, so as to enable a detector to detect the door starting to open, detecting the door starting to open by the detector and whether there is a failure of the second attachment housing, and controlling a second unlocking actuator to deactivate the second attachment housing.
Claims10
A method for unlocking a door of an aircraft landing gear movably mounted between an open position and a closed position, the door being associated with an attachment means comprising a first attachment housing and a second attachment housing arranged to individually lock the door in the closed position, a first unlocking actuator and a second unlocking actuator arranged to respectively control the first attachment housing and the second attachment housing to deactivate by disengaging or disconnecting the first attachment housing and the second attachment housing from the door, and detection means for detecting the door in the closed position, the method comprising, during a first sequence of opening the door that is locked in the closed position by the first attachment housing and the second attachment housing:
- controlling the first unlocking actuator to deactivate the first attachment housing;
- waiting a first waiting time greater than a time necessary for the door to initiate a passage from the closed position to the open position, so as to enable the detection means to detect the door starting to open;
- detecting the door starting to open by the detection means and whether there is a failure of the second attachment housing;
- and
- controlling the second unlocking actuator to deactivate the second attachment housing.
A device for unlocking a door of an aircraft landing gear, the device comprising:
- attachment means comprising a first attachment housing and a second attachment housing arranged to lock the door in the closed position;
- a first unlocking actuator and a second unlocking actuator arranged to respectively control the first attachment housing and the second attachment housing to deactivate by disengaging or deactivating the first attachment housing and the second attachment housing from the door;
- detection means for detecting the door in the closed position;
- and
- a control unit configured to perform a method comprising, during a first sequence of opening the door that is locked in the closed position by the first attachment housing and the second attachment housing:
- controlling the first unlocking actuator to deactivate the first attachment housing;
- waiting a first waiting time greater than a time necessary for the door to initiate a passage from the closed position to the open position, so as to enable the detection means to detect the door starting to open;
- detecting the door starting to open by the detection means and whether there is a failure of the second attachment housing;
- and
- controlling the second unlocking actuator to deactivate the second attachment housing.
A device for unlocking a door of an aircraft landing gear, the device comprising:
- an emergency actuator comprising a first attachment housing and a second attachment housing arranged to lock the door in the closed position;
- a first unlocking actuator and a second unlocking actuator arranged to respectively control the first attachment housing and the second attachment housing to deactivate by disengaging or disconnecting the first attachment housing and the second attachment housing from the door;
- at least one proximity sensor that detects the door in the closed position;
- and
- a controller that, during a first sequence of opening the door that is locked in the closed position by the first attachment housing and the second attachment housing:
- controls the first unlocking actuator to deactivate the first attachment housing;
- waits a first waiting time greater than a time necessary for the door to initiate a passage from the closed position to the open position, so as to enable the at least one proximity sensor to detect the door starting to open;
- control the at least one proximity sensor to detect the door starting to open and whether there is a failure of the second attachment housing;
- and
- controls the second unlocking actuator to deactivate the second attachment housing.
Dependencies are inferred from the claim text.