The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 29, 2000
Filed:
Jul. 06, 1998
Applicant:
Inventors:
Bruno Maino, Samarate, IT;
Alberto Bellazzi, Cameri, IT;
Assignee:
Finmeccanica S.p.A., Rome, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B64C / ;
U.S. Cl.
CPC ...
244 1713 ; 244 39 ; 244 60 ; 244 1711 ; 180337 ; 180338 ;
Abstract
The monitoring method includes the steps of: acquiring a signal from an acceleration sensor; calculating a transform in the frequency domain of the signal to obtain a sequence of samples; acquiring a sample in the sequence of samples; calculating an actual amplitude value of the acquired sample; calculating a relative deviation between the actual amplitude value of the acquired sample and a reference amplitude value; and comparing the relative deviation with at least one predetermined threshold to immediately detect any irregularity in, and so prevent in-flight failure of, the helicopter transmission assembly.