Method and apparatus for actively reducing multiple-source repetitive vibrations
US5245552A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1990 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Oct 31, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3053
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method and apparatus for reducing multiple-source repetitive vibrations in a region or structure (12) by applying control vibrations to the region or structure via actuators (18), frequently recalculating the control vibrations based on source elements to accommodate for varying phase differences between the sources of the repetitive vibrations (14) and (16), and cyclically updating the source elements of the control vibrations is disclosed. The repetitive vibrations are sensed (20) synchronously with the repetitive vibration source chosen as the reference source and decomposed into a number of frequency components corresponding to the reference source. The control vibrations are formed of the same frequency components and applied synchronously with the reference source. Each frequency component of the control vibrations is defined by source elements, one for cancelling vibrations produced by each of the repetitive vibration sources. A first estimate of the source elements of the frequency components, defining control vibrations that will reduce the sensed vibrations, is made. The source elements of the frequency components and the phase differences between the reference source a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.