Cwea-4 Sonic Analyzer with UH-1 Helicopter Capability.

摘要

The purpose of the work encompassed in the report was (1) to fabricate a CWEA-4 Diagnostic Sonic Analyzer and (2) to design and fabricate a UH-1 helicopter plug-in module with both T53 engine and UH-1 helicopter power train components capability. The methods employed in achieving this work consisted of (1) analyzing mechanical data to determine the frequencies of the rotating components, (2) performing a microphone survey and locking frequency investigation, (3) analyzing the acoustical data to develop spectral familiarity and to establish initial analyzer programming and system compatibility, and (4) conducting a field application program utilizing the CWEA-4 Sonic Analyzer to correlate analyzer indications with the mechanical condition of the rotating components and to establish analyzer limits. (Author)