| 摘要 |
A method of detecting a fuel leak from a fuel store of an aircraft is described. In the described embodiment, a processor ( 1 ) receives inputs ( 2, 3 ) relating to the amount of fuel in the fuel store and to the rate of fuel used by the aircraft, both inputs being subject to noise. The processor defines a fuel flow system state defined by a noise-compensated measures of the amount of fuel in the fuel store, a fuel leak amount estimate and a fuel leak rate estimate. The processor ( 1 ) periodically calculates a new estimated state of the system in view of a previous estimated state of the system and values of the inputs ( 2, 3 ). The processor monitors the fuel leak amount estimate and the fuel leak rate estimate and if either exceeds a respective threshold value send a signal to a fuel leak warning means ( 4 ). The method employed in the embodiment employs a recursive state estimation method that improves leak detection, reduces false alarms and is less demanding on processor and memory requirements.
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