Adaptive noise cancellation in a closed loop control system
US5157596A · kind A · utility
21Cited by
7References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 17, 1987 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Jul 17, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B13/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An adaptive noise cancellation system reduces undesired noise in a closed loop control system by injecting an adaptively constructed noise cancellation signal at an appropriate point in the closed control loop. The generation of a compensation filter N for adaptive noise cancellation loop error signal is disclosed by two methods. A first method is an inverse error rejection response (IERR) method. A second method optimally matches spectrums of a noise signal and a noise reference signal at the adaptive noise cancellation system. This second method is referred to as a spectral matching (SM) method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.