Boots – shoes – and leggings
Patent
1990-09-27
1992-11-10
Lall, Parshotam S.
Boots, shoes, and leggings
73577, 340603, G01M 700
Patent
active
051630117
ABSTRACT:
A system for determining the magnitude of loads on rotating helicopter components from sensor signals remotely measured on the helicopter fuselage is characterized by a controller which samples the sensor signals according to phase. These measured signals are presented to a coefficient programming module where they are combined with correlation signals to correlate the measured signal components with the desired parameter, such as flatwise bending moments of a helicopter blade. The correlation signals are established in a calibration process that determines the independent values of the measured signals using a Jones orthoganization process. The signals output from the module are recombined to provide a time dependent signal corresponding to the desired parameter. The present system avoids decomposition and recomposition of the measured signals and therefor operates in real time.
REFERENCES:
patent: 3758758 (1973-09-01), Games et al.
patent: 4426641 (1984-01-01), Kurihara et al.
patent: 4894787 (1990-01-01), Flannelly et al.
patent: 4953098 (1990-08-01), Fischer, Jr. et al.
Bently Nevada Applications Note, "The Keyphasor--A Necessity for Machinery Diagnosis!" Nov. 1977.
Kaman Aerospace Corporation
Lall Parshotam S.
Ramirez Ellis R.
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