NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Diagnostic device for monitoring the technical condition of mechanical assembliesAn automatic diagnostic device for monitoring the condition of tractor transmission gears is described. The structural noise spectrum of the gearshift box and rear axle of the tractor were analyzed in a digital computer, by an algorithm based on the multiple correlation method. The optimum assembly of operating frequencies, by use of which the errors in measurement were minimized, was selected from the entire frequency spectrum. Selected frequencies are necessary for choosing the measurement range of the diagnostic device. It turned out that, to obtain a relative error of no more than 2%, it was sufficient to use two filters, vibrating only at the frequencies carrying the maximum data of the mechanical parameter being investigated. The measurement system consists of frequency-selection filters, amplifiers and quadratic detectors, at the outlets of which constant voltages are created, which are proportional to the signal level at the frequencies selected.
Document ID
19740021741
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Osovskiy, V. I.
(Kanner (Leo) Associates Redwood City, CA, United States)
Shergin, V. V.
(Kanner (Leo) Associates Redwood City, CA, United States)
Shumilin, V. I.
(Kanner (Leo) Associates Redwood City, CA, United States)
Date Acquired
August 7, 2013
Publication Date
June 1, 1973
Publication Information
Publication: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899)
Subject Category
Machine Elements And Processes
Accession Number
74N29854
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available