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. 10, 1993
Filed:
Sep. 24, 1992
Nayomon Uno, Hasuda, JP;
Masao Mutaguchi, Yotsukaidou, JP;
Ishikawajima-Harima Heavy Industries Co., Ltd., Tokyo, JP;
Abstract
A vibration damping system adapted for use on top of a structure, comprises: a weight disposed on the top of the structure in a manner such that it can undergo simple harmonic oscillation; an acceleration sensor provided at the structure top for detecting the structure vibration in terms of acceleration; a weight driving mechanism for actuating the weight into the simple harmonic oscillation; and a phase and amplitude controller assembly for performing integration twice on the signal coming from the acceleration sensor, once to obtain the velocity signal, then to obtain the displacement singal, for reversing the sign of the velocity signal when the velocity signal exceeds a predetermined value, and for controlling the weight driving mechanism on the basis of the sign-reversed velocity singal so as to attenuate the vibration of the structure by giving the energy of the weight performing simple harmonic oscillation under control of the phase and amplitude controller assembly to the structure in optimum timing and with an optimum magnitude.