Disturbance observer with energy reducing filter
US9601143B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2015 |
| Grant date | Mar 21, 2017 |
| Priority date | — |
| Expiry date | Aug 28, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59694
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disturbance rejection in a closed loop multi-actuator system. In some embodiments, a first disturbance observer (DOB) circuit is configured to inject a first disturbance rejection signal into an input control signal of a first stage of a multi-stage actuator. A second DOB circuit is configured to concurrently inject a second disturbance rejection signal into an input control signal of a second stage of the multi-stage actuator. Each of the first and second DOB circuits includes a band pass filter and an energy reducing filter. In some embodiments, the energy reducing filter has at least one notch filter and at least one anti-notch filter. In other embodiments, the energy reducing filter is a low-pass filter (LPF).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.