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:
Aug. 13, 2024
Filed:
Jun. 22, 2022
Harbin Engineering University, Harbin, CN;
Yuxin Zhao, Harbin, CN;
Tingxiao Wei, Harbin, CN;
Yueyang Ben, Harbin, CN;
Lei Wu, Harbin, CN;
Qian Li, Harbin, CN;
Guangtao Zhou, Harbin, CN;
Qianqian Gao, Harbin, CN;
Xiaofeng Wei, Harbin, CN;
Shuaiyang Li, Harbin, CN;
HARBIN ENGINEERING UNIVERSITY, Harbin, CN;
Abstract
A strapdown inertial navigation heave measurement method using multiple low-pass filter units includes: firstly, collecting data of a gyroscope and an accelerometer by a system, obtaining attitude information of a carrier by using initial alignment, and then, obtaining a relationship matrix between a body coordinate system and a geographic coordinate system by using the attitude information; obtaining a relationship matrix between the geographic coordinate system and a reference coordinate system according to a geographic position, and obtaining a rough vertical acceleration by using a direction cosine matrix, output information of the accelerometer and gravity information; then, filtering out low-frequency signals by using a first filter unit and integration to obtain a relatively accurate velocity signal; and furthermore, enabling the vertical acceleration to be subjected to a second filter unit and integration to obtain an accurate heave displacement.