Accession Number : ADP010194
Title : Model-Based Sensor Selection for Helicopter Gearbox Monitoring
Corporate Author : MASSACHUSETTS UNIV AMHERST
Personal Author(s) : Jammu, Vinay B. ; Wang, Keming ; Danai, Kourosh ; Lewicki, David G.
PDF Url : ADP010194
Report Date : APR 1996
Pagination or Media Count : 11
Abstract : A new methodology is introduced to quantify the significance of accelerometers for fault diagnosis of helicopter gearboxes. The basis for this methodology is an influence model which represents the effect of various component faults on accelerometer readings. Based on this model, a set of selection indices are defined to characterize the diagnosability of each component, the coverage of each accelerometer, and the relative redundancy between the accelerometers. The effectiveness of these indices is evaluated experimentally by measurement fault data obtained from an OH-58A main rotor gearbox. These data are used to obtain a ranking of individual accelerometers according to their significance in diagnosis. Comparison between the experimentally obtained rankings and those obtained from the selection indices indicates that the proposed methodology offers a systematic means for accelerometer selection.
Descriptors : *SYMPOSIA, *ACCELEROMETERS, *HELICOPTER ROTORS, *TRANSMISSIONS(MECHANICAL), VIBRATION, MONITORING, SAFETY, DIAGNOSIS(GENERAL).
Subject Categories : Helicopters
Surface Transportation and Equipment
Test Facilities, Equipment and Methods
Distribution Statement : APPROVED FOR PUBLIC RELEASE