US 4,929,874 AGranted

Vibration control system

AssigneeBridgestone Corporation

InventorsKeiichiro Mizuno, Kazuyoshi Iida, Kazutomo Murakami

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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.

Claims5

Dependent claims

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.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 07/247,562Filed 22 Sep 1988
Priority: JP 62-24147925 Sep 1987
Granted: 29 May 1990
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G05D 19/02
Control of mechanical oscillations, e.g. of amplitude, of frequency, of phase: characterised by the use of electric means
F16F 15/02
Suppression of vibrations in systems ; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion: suppression of…
G01M 7/022
Vibration-testing by means of a shake table: vibration control arrangements, e.g. for generating random vibrations
G05D
Systems for controlling or regulating non-electric variables