Patents by Inventor Lilong WEI

Lilong WEI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for initial alignment of an inertial navigation apparatus
    Patent number: 10670424
    Abstract: A method for initial alignment of an inertial navigation apparatus, comprising the following steps: providing an apparatus loaded with a sensor, and preprocessing the sensor; carrying out relative alignment to calculate an installation error angle of the sensor; carrying out absolute alignment to calculate an installation attitude angle error of the sensor to increase an accuracy of an error attitude angle calculated during the relative alignment. The relative alignment process calculates a relative error attitude angle, the relative error attitude angle being used as the initial value for attitude error in a stat vector in the absolute alignment process, thereby accelerating convergence of the Kalman filter. Alignment precision is further enhanced by the absolute alignment process.
    Type: Grant
    Filed: July 4, 2016
    Date of Patent: June 2, 2020
    Assignee: SHANGHAI HUACE NAVIGATION TECHNOLOGY LTD
    Inventors: Qiang Ren, Jiejun Wang, Xuefeng Shen, Lilong Wei, Guiyan Cui
  • A METHOD FOR INITIAL ALIGNMENT OF AN INERTIAL NAVIGATION APPARATUS
    Publication number: 20180274940
    Abstract: A method for initial alignment of an inertial navigation apparatus, comprising the following steps: providing an apparatus loaded with a sensor, and preprocessing the sensor; carrying out relative alignment to calculate an installation error angle of the sensor; carrying out absolute alignment to calculate an installation attitude angle error of the sensor to increase an accuracy of an error attitude angle calculated during the relative alignment. The relative alignment process calculates a relative error attitude angle, the relative error attitude angle being used as the initial value for attitude error in a stat vector in the absolute alignment process, thereby accelerating convergence of the Kalman filter. Alignment precision is further enhanced by the absolute alignment process.
    Type: Application
    Filed: July 4, 2016
    Publication date: September 27, 2018
    Applicant: SHANGHAI HUACE NAVIGATION TECHNOLOGY LTD
    Inventors: Qiang REN, Jiejun WANG, Xuefeng SHEN, Lilong WEI, Guiyan CUI