Apparatus and method for actively reducing vibration and/or noise
US5910993A · kind A · utility
19Cited by
10References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 1997 |
| Grant date | Jun 8, 1999 |
| Priority date | — |
| Expiry date | May 16, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/511
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
In apparatus and method for actively reducing a periodic vibration and/or noise, a divergence determinator is provided in which a presence or absence of a higher order divergence of a control of the reduction of the periodic vibration and/or noise is determined on the basis of a sum of two sampled values of at least one of either a drive signal y or a residual wave (vibration or noise) signal e, phases of the two sampled values being mutually deviated from each other by an approximately half period of a fundamental order of the corresponding drive or residual wave signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.