Engine vibration monitoring using accelerometers

The present invention provides a system and method for using the external accelerometer (16) in an aircraft engine configuration (26) as a backup accelerometer, in the event the internally located production accelerometer (12) fails. The sensor location of the external accelerometer (16) has an acce...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MOLLMANN, DANIEL E, MERWE, GERT VEN DER
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR PHYSICS TARIFF METERING APPARATUS TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:	The present invention provides a system and method for using the external accelerometer (16) in an aircraft engine configuration (26) as a backup accelerometer, in the event the internally located production accelerometer (12) fails. The sensor location of the external accelerometer (16) has an acceptable sensitivity to fan imbalance, similar to the location of the former alternate accelerometer. The signal from this external accelerometer (16) is duplicated using software in the signal conditioning hardware (18), creating the second, alternate signal. As an alternative embodiment, the signal may be duplicated by simply teeing or branching the original signal, using hardware rather than software.