Methods using enhanced signal averaging techniques have been developed to give early warning of the onset of a variety of gearbox failures. Prototype analysis equipment has been developed and tested which will permit the condition of components within helicopter dynamic systems (rotors, gearboxes, and powerplants) to be established. The paper describes work carried out in the Fleet Air Arm to develop and prove the gearbox vibration techniques involved. Arrangements for data collection in flight and during ground runs are described. The signal processing methods, including the automatic techniques for secondary analysis which enable defined features to be extracted from the basic signatures, are discussed. Examples are given of the extent to which damage or malfunction of various internal components can be discerned by the techniques employed. The question of application to the widely dispersed fleet of naval aircraft is considered, and the prospects for achieving full on-condition maintenance of in-service gearboxes is assessed.
Condition monitoring of helicopter gearboxes using automatic vibration analysis techniques
Zustandsanzeige bei Hubschraubergetrieben mit Hilfe automatischer Schwingungsanalysemethoden
1985
9 Seiten, 6 Bilder, 2 Tabellen
Aufsatz (Konferenz)
Englisch
CONDITION MONITORING OF HELICOPTER GEARBOXES BY EMBEDDED SENSING
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