Individual Aircraft Tracking Methods for Fighter Aircraft Utilizing Counting Accelerometer Data

This paper examines two individual aircraft tracking methods for tracking crack growth in fighter aircraft utilizing counting accelerometer data. Individual aircraft tracking programs were developed for the F-4 and A-7D aircraft in conjunction with damage tolerance assessment programs conducted for...

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Bibliographic Details
Main Author: Gray, Terry
Format: Report
Language:English
Subjects:
ACCELEROMETERS
AIRCRAFT
Attack and Fighter Aircraft
BASE LINES
COUNTING METHODS
CRACK PROPAGATION
DAMAGE
DAMAGE TOLERANCE
FIGHTER AIRCRAFT
INDEXES
METHODOLOGY
MONITORING
POSITION(LOCATION)
REGRESSION ANALYSIS
STRUCTURAL PROPERTIES
Test Facilities, Equipment and Methods
TRACKING
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Summary:This paper examines two individual aircraft tracking methods for tracking crack growth in fighter aircraft utilizing counting accelerometer data. Individual aircraft tracking programs were developed for the F-4 and A-7D aircraft in conjunction with damage tolerance assessment programs conducted for these aircraft. Both the F-4 and A-7D tracking methods were based on existing counting accelerometer data acquisition systems. The F-4 tracking method utilizes an equivalent S-N curve system to calculate a damage index at a monitoring location. The A-7D tracking method utilizes regression analysis to calculate equivalent baseline hours expended at a monitoring location. Both methods then relate damage at the monitoring location to damage at other critical structural locations.