Patents by Inventor John Akagi

John Akagi 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).

  • Publication number: 20240124162
    Abstract: For maneuvering a spacecraft, a method calculates a virtual point that represents a plurality of spacecraft orbiting in a spacecraft formation. The method iteratively calculates a desired trajectory relative to the virtual point for a given spacecraft of the plurality of spacecraft using a relative orbital elements (ROE) state x of the virtual point and the given spacecraft. Model predictive control maintains the given spacecraft within an ROE constraint for a given time interval subject to a fuel consumption. In response to determining a drift trajectory of the given spacecraft is outside of a trajectory tolerance of the desired trajectory, maneuvering the given spacecraft to within the trajectory tolerance using a maneuver trajectory determined using the model predictive control.
    Type: Application
    Filed: December 4, 2023
    Publication date: April 18, 2024
    Applicant: Space Dynamics Laboratory
    Inventors: Tyson Smith, John Akagi, Greg Droge
  • Publication number: 20240002072
    Abstract: For maneuvering a spacecraft, a method calculates a virtual point that represents a plurality of spacecraft orbiting in a spacecraft formation. The method further iteratively calculates an inner polytope boundary relative to the virtual point for a given spacecraft of the plurality of spacecraft. In response to determining the inner polytope boundary will be breached, the method maneuvers the given spacecraft to within the inner polytope boundary based on a switching condition, a guidance law, and model predictive control to minimize fuel consumption.
    Type: Application
    Filed: September 12, 2023
    Publication date: January 4, 2024
    Applicant: Space Dynamics Laboratory
    Inventors: Tyson Smith, John Akagi, Greg Droge
  • Publication number: 20230286674
    Abstract: For model predictive control for a spacecraft formation, a method calculates a virtual point that represents a plurality of spacecraft orbiting in a spacecraft formation. The method calculates an outer polytope boundary and an inner polytope boundary relative to the virtual point for a given spacecraft of the plurality of spacecraft. The method maneuvers the given spacecraft to within the inner polytope boundary using model predictive control (MPC) to minimize fuel consumption.
    Type: Application
    Filed: August 19, 2022
    Publication date: September 14, 2023
    Applicant: Utah State University Space Dynamics Laboratory
    Inventors: Tyson Smith, John Akagi, Greg Droge
  • Publication number: 20230286673
    Abstract: For model predictive control for a spacecraft formation, a method calculates a virtual point that represents a plurality of spacecraft orbiting in a spacecraft formation. The method calculates an outer polytope boundary and an inner polytope boundary relative to the virtual point for a given spacecraft of the plurality of spacecraft. The method maneuvers the given spacecraft to within the inner polytope boundary using model predictive control (MPC) to minimize fuel consumption.
    Type: Application
    Filed: March 8, 2022
    Publication date: September 14, 2023
    Applicant: Utah State University Space Dynamics Laboratory
    Inventors: Tyson Smith, John Akagi, Greg Droge