Hybrid stabilizer with optimized resonant and control loop frequencies
US9300872B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 20, 2014 |
| Grant date | Mar 29, 2016 |
| Priority date | — |
| Expiry date | Jul 13, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/644
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hybrid stabilizer isolates a payload from vibrations across six degrees of freedom using an underdamped passive stabilizer in series with an active stabilizer that is mounted to the foundation, thereby improving isolation. In a first aspect, the passive stabilizer is one or more underdamped springs that reduce high frequency vibrations and in some embodiments the passive stabilizer is tuned to a resonant frequency at most half the control loop frequency of the active stabilizer. The active stabilizer is a six-axis motion platform that reduces or eliminates low frequency vibrations, particularly around the resonant frequency of the passive stabilizer. In a second aspect, the hybrid stabilizer isolates one or more cameras and is mounted to a vehicle, reducing motion blur and improving camera tracking, thereby enhancing the quality of images captured by the cameras.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.