Method to detect mechanical faults and dynamic instability...

Details Method to detect mechanical faults and dynamic instability... Method to detect mechanical faults and dynamic instability...

2008-09-18

2011-10-18

Nghiem, Michael (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C701S029000

Reexamination Certificate

active

08041520

ABSTRACT:
A method of processing revolution to revolution blade track height and timing data so that mechanical and dynamic stability, maladjustments, and defects are discovered in a rotor with a plurality of blades on a vertical lift aircraft. Tracking devices collect blade track height and timing data. That data are processed into track and lead-lag data sets. Data set values are sorted maximum to minimum, or in reverse order, to remove the chaotic character of the collected data, thereby adding coherence and linearity to it. Defects and maladjustments are found by analyzing processed aircraft flight condition data combined in various ways. Only ground and hover flight condition analysis is required. Data collection and analysis is very rapid and the analysis output is presented graphically. The analyzed data are available moments after collection. Significant operational, safety, and cost saving are achieved.

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N A Sargent, An Analysis of Detector Data Collected During the MFR Flight Trials, Doc. Ref. HT/0060/DDAI, Apr. 23, 1993, 15 pages, Helitune Limited.

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