Patents by Inventor Yanji Liu

Yanji Liu 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: 11977383
    Abstract: An intelligent course planning method and controller for unmanned surface vehicle are provided, an overall optimization from starting point to end point of course deflection angle is achieved based on an optimization principle of approximate dynamic programming; an optimization of minimization of the course deflection angle and a control signal is achieved based on a quadratic form cost function and a performance index by designing a virtual radial basis function neural network and a least square method, a target course expression is obtained, and a stability and a degree of convergence are ensured through a positive-definite constraint of the Hessian matrix of the performance index. Compared with the related art, an overshoot of course deflection and the control signal is reduced, an optimization of flight and steering energy consumption is achieved, and completely data-driven for intelligent course planning for unmanned surface vehicle and a high-accuracy feedback adjustment are achieved.
    Type: Grant
    Filed: August 7, 2023
    Date of Patent: May 7, 2024
    Assignee: Shanghai Maritime University
    Inventors: Zhijian Huang, Lizhe Yang, Siyu Zhang, Guichen Zhang, Yanji Liu, Hongren Wang
  • Publication number: 20240118694
    Abstract: An intelligent course planning method and controller for unmanned surface vehicle are provided, an overall optimization from starting point to end point of course deflection angle is achieved based on an optimization principle of approximate dynamic programming; an optimization of minimization of the course deflection angle and a control signal is achieved based on a quadratic form cost function and a performance index by designing a virtual radial basis function neural network and a least square method, a target course expression is obtained, and a stability and a degree of convergence are ensured through a positive-definite constraint of the Hessian matrix of the performance index. Compared with the related art, an overshoot of course deflection and the control signal is reduced, an optimization of flight and steering energy consumption is achieved, and completely data-driven for intelligent course planning for unmanned surface vehicle and a high- accuracy feedback adjustment are achieved.
    Type: Application
    Filed: August 7, 2023
    Publication date: April 11, 2024
    Inventors: Zhijian Huang, Lizhe Yang, Siyu Zhang, Guichen Zhang, Yanji Liu, Hongren Wang