Patent US4078434A successfully refreshed from Google Patents.
US4078434A
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US
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Method and apparatus for determining the parameters of natural vibration of a system
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1976-12-07
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Granted: 1978-03-14
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Expires: 1996-12-07
Abstract
Abstract An arrangement for ascertaining the parameters of natural vibrations and dampings of a multi-component dynamic system comprises a vibration detector applied to a component of the system for detecting and producing electrical signals constituting a measure of the mechanical vibrations produced by system internal excitement by stochastic disturbances. A frequency analyzer is connected to the signal output of the vibration detector for analyzing the signals on a progressive basis throughout the entire frequency range being examined to obtain corresponding data from which resonance curves are plotted and from which the natural frequencies and dampings of the system are obtained.
Inventors
- 👤 Josef Weberhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:15
CPC Classifications
G; G07; G07C; G07C3/00; G01; G01H; G01H13/00; G01N; G01N29/00; G01N29/04; G01N29/12; G01N2291/00; G01N2291/26; G01N2291/269; G01N2291/2693
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
The method of ascertaining the parameters of natural vibrations and dampings of a multi-component dynamic system which comprises the steps of producing signals which constitute a measure of the vibrations produced by system internal excitement by stochastic disturbances, suppressing periodic components of the vibration signals, deriving corresponding resonance curves by frequency analysis of the vibration signals on a progressive basis throughout the entire frequency range being examined and ascertaining from the resonance curves the natural frequencies and dampings of the system's natural vibrations.
Claim 2
Independent Claim
83 words
The method of ascertaining the parameters of natural vibrations and dampings of a multi-component dynamic system which comprises the steps of producing signals which constitute a measure of the vibrations produced by system internal excitement by stochastic disturbances, suppressing periodic components of the vibration signals, deriving corresponding resonance curves by frequency analysis of the vibration signals on a progressive basis throughout the entire frequency range being examined and ascertaining from the resonance curves the natural frequencies and dampings of the system's natural vibrations.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |