US4929874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration control system
Assignee: Bridgestone Corp
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Filing: 1988-09-22
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Granted: 1990-05-29
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Expires: 2008-09-22
Abstract
Abstract A vibration control system for damping vibration of an body to be isolated against vibration. The body is supported on a movable base through the medium of vibration-damping supporting structure. The control system comprises a vibration sensor for detecting vibration of the movable base. An inverse vibration signal generating circuit includes a digital sensor and in supplied with a detection signal outputted from the vibration sensor for generating a signal with a waveform to cancel out the vibration of the body through interference therewith. An actuator is connected operatively to the movable base and the inverse vibration signal generating circuit for converting the signal derived from the latter into a mechanical vibration to be applied to the body.
Inventors
- 👤 Keiichiro Mizuno
- 👤 Kazuyoshi Iida
- 👤 Kazutomo Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:38
CPC Classifications
G; G05; G05D; G05D19/00; G05D19/02; F; F16; F16F; F16F15/00; F16F15/02; G01; G01M; G01M7/00; G01M7/02; G01M7/022
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
A vibration control system for isolating or damping vibration of a body to be protected from the vibration, said body being supported on a movable foundation through the medium of a vibration isolating supporting structure, comprising: a vibration sensor for detecting vibration of said movable foundation; an inverse vibration signal generating device supplied with the detection signal output from said vibration sensor for generating a vibration signal of such a waveform as to cancel out the vibration of said body through interference therewith; and an actuator connected operatively to said body and said inverse vibration signal generating device for converting said vibration signal derived from said inverse vibration signal generating device into a mechanical vibration to be applied to said body to thereby decrease the vibration thereof.
Claim 2
Dependent Claim
127 words
A vibration control system for isolating or damping vibration of a body to be protected from the vibration, said body being supported on a movable foundation through the medium of a vibration isolating supporting structure, comprising: a vibration sensor for detecting vibration of said movable foundation; an inverse vibration signal generating device supplied with the detection signal output from said vibration sensor for generating a vibration signal of such a waveform as to cancel out the vibration of said body through interference therewith; and an actuator connected operatively to said body and said inverse vibration signal generating device for converting said vibration signal derived from said inverse vibration signal generating device into a mechanical vibration to be applied to said body to thereby decrease the vibration thereof.
Claim 3
Dependent Claim
29 words
A vibration control system set forth in claim 1, wherein said actuator is disposed in parallel with said vibration isolating supporting structure between said movable foundation and said body.
Claim 4
Dependent Claim
54 words
A vibration control system set forth in claim 1, wherein said inverse vibration signal generating device includes a digital filter having a filtering factor determined such that a signal of waveform capable of cancelling out the vibrational waveform transmitted to said body from said foundation is generated by said inverse vibration signal generating device.
Claim 5
Dependent Claim
18 words
A vibrational control system set forth in claim 3, wherein said digital filter is implemented by a microprocessor.
Claim 6
Dependent Claim
37 words
A vibration control system set forth in claim 3 or 4, wherein the filtering factor of said digital filter is adjustable in dependence on an output signal of a sensor intended for detecting vibration of said body.
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) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |