The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 03, 2024
Filed:
Jan. 29, 2024
Hangzhou City University, Hangzhou, CN;
Zhenbing Qiu, Hangzhou, CN;
Yanjun Li, Hangzhou, CN;
Hangzhou City University, Hangzhou, CN;
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 N, if k<N, then repeating the step 3, if k=N, then finishing filtering, and outputting the attitude quaternion, the gyro drift and the corresponding error covariance.