Patents by Inventor Xiuwei Xia

Xiuwei Xia 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).

  • Patent number: 11512976
    Abstract: The disclosure discloses a latitude-free initial alignment method under a swaying base based on gradient descent optimization. Firstly, swaying base latitude-free alignment is regarded as a Wahba attitude determination problem to inhibit device noise interference, and an objective function is established based on a gravitational acceleration vector under an earth system; then an exact solution of the objective function is obtained through a gradient descent optimization method, and inertial system conversion quaternion estimation is achieved under the latitude-free condition; and finally, an attitude quaternion is determined by only using information of an accelerometer and a gyroscope of a strapdown attitude heading reference system, and therefore latitude-free initial alignment under the swaying base is achieved.
    Type: Grant
    Filed: April 21, 2021
    Date of Patent: November 29, 2022
    Assignee: HARBIN INSTITUTE OF TECHNOLOGY
    Inventors: Ya Zhang, Qian Sun, Wei Gao, Fei Yu, Yanyan Wang, Xiuwei Xia, Jianxiong Wei, Weiqi Miao
  • Publication number: 20210262828
    Abstract: The disclosure discloses a latitude-free initial alignment method under a swaying base based on gradient descent optimization. Firstly, swaying base latitude-free alignment is regarded as a Wahba attitude determination problem to inhibit device noise interference, and an objective function is established based on a gravitational acceleration vector under an earth system; then an exact solution of the objective function is obtained through a gradient descent optimization method, and inertial system conversion quaternion estimation is achieved under the latitude-free condition; and finally, an attitude quaternion is determined by only using information of an accelerometer and a gyroscope of a strapdown attitude heading reference system, and therefore latitude-free initial alignment under the swaying base is achieved.
    Type: Application
    Filed: April 21, 2021
    Publication date: August 26, 2021
    Inventors: Ya Zhang, Qian Sun, Wei Gao, Fei Yu, Yanyan Wang, Xiuwei Xia, Jianxiong Wei, Weiqi Miao