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:
Aug. 07, 1990
Filed:
Apr. 06, 1989
Helmut Habermann, Vernon, FR;
Pierre Lemerle, Vernon, FR;
Societe de Mecanique Magnetique S.A., Saint-Marcel, FR;
Abstract
A combination vibration generator and dampener having magnetic suspension and servo-control along three axes includes a hollow outer body fixed to a structure whose vibration is to be controlled, and an inner body which is essentially spherical in shape and which is inside the hollow outer body. Six active magnetic bearing elements are diametrically disposed in pairs along three orthogonal axes and serve to hold the inner spherical body inside the hollow outer body without direct contact between the inner and outer body. At least three position detectors detect the position of the inner body relative to the hollow outer body while at least one vibration detector device detects vibration forces on the structure whose vibration is to be controlled. Control apparatus, coupled to the position detectors and the vibration detector device, receives information from the position detectors and the vibration detector device for controlling the supply of power to the six active magnetic bearing elements in order to control the movement of the inner body in such a manner as to either set up forces on the outer body tending to generate vibration in the structure, or alternatively, to cancel vibration forces detected on the structure.