An avionics unit 102 has a communications interface 106A interfacing with one or more avionics units 104, transmitting a signal to the other units. The signal has a first state, indicating a fault condition if the first state persists for a predetermined time. When the first state has a duration less than the predetermined time a processor modulates an output at the interface to provide a modulated signal indicating a characteristic of a present state of the avionics unit with respect to the fault condition, the modulated signal including the first state and a different second state. Preferably, after continuously receiving a signal having the first state for the predetermined time, a further avionics unit sends a signal to a health monitoring system to record data. The characteristic may be a measure of a separation between the present state of the avionics unit and the fault condition, the measure indicating the time until a fault condition is expected to occur. The avionics unit may be a back-up brake control unit, and receive signals from a number of brake pedal position sensors.
Avionics unit
2021-02-03
Patent
Electronic Resource
English
IPC: | B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT |