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:
Dec. 05, 1995
Filed:
Nov. 23, 1993
Kenneth D Garnjost, Buffalo, NY (US);
Gonzolo J Rey, Batavia, NY (US);
Other;
Abstract
A method of controlling the application of counter-vibration to a structure (20) so as to reduce the effect of externally-created sinusoidal vibration thereon includes the steps of: mounting a vibratory force generator (19) on the structure; mounting an accelerometer (21) on the structure at a point at which vibration is to be measured; providing a tunable filter (16) capable of resonating at an electrically-controllable frequency; providing an adaptive frequency estimator (22) arranged to produce a tuning signal (.theta.) as a function of the accelerometer output signal (a); supplying the tuning signal and accelerometer output signal to the filter; continuously adjusting the resonant frequency of the filter so as to equal the frequency of the accelerometer output signal so that the accelerometer output signal will be greatly amplified at the filter output; and supplying the filter output signal as an electrical command signal (y) to the force generator; thereby to cause the vibratory force generator to apply counter-vibrations to the structure to reduce the effect of the externally-created vibrations at the measurement point.