Weight and reference quaternoin correction unscented quaternoin estimation method
US12078489B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2024 |
| Grant date | Sep 3, 2024 |
| Priority date | — |
| Expiry date | Jan 29, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a weight and reference quaternion correction unscented quaternion estimation method, comprising: obtaining measurement data as quantity measurement through a gyro and a star sensor; establishing a quaternion-based discrete spacecraft nonlinear state space model; estimating an error quaternion, a gyro drift and a corresponding error covariance at a k moment by using an unscented quaternion estimator based on parameter and reference quaternion correction at a k−1 moment; and setting a filtering time as Ntime, if k<Ntime, then repeating the step 3, if k=Ntime, then finishing filtering, and outputting the attitude quaternion, the gyro drift and the corresponding error covariance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.