Patents by Inventor Benjamin J. Graham

Benjamin J. Graham 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).

  • Navigation integrity in GPS challenged environments
    Patent number: 11879736
    Abstract: Systems and methods for detecting degraded navigation sensors are based on a policy derived from a Partially Observable Markoff Decision Process (POMDP). Navigation parameters derived from the navigation sensors are provided to individual Kalman filters. A covariance of each of the filters is indicative of a probability of degradation of a sensor from which the navigation parameter is derived. Outputs of the Kalman filters are provided to a master filter. The master filter is compared to a criterion to determine whether there are indicia of a degraded sensor. If such an indicia are present, the Policy is consulted to determine which of the sensors are degraded. Consideration of degraded sensors when navigating a vehicle is inhibited.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: January 23, 2024
    Assignee: Raytheon Company
    Inventors: Taehwan Kim, Kenneth L Moore, James T. Landon, Jarrett M. Perry, Benjamin J. Graham
  • NAVIGATION INTEGRITY IN GPS CHALLENGED ENVIRONMENTS
    Publication number: 20230392929
    Abstract: Systems and methods for detecting degraded navigation sensors are based on a policy derived from a Partially Observable Markoff Decision Process (POMDP). Navigation parameters derived from the navigation sensors are provided to individual Kalman filters. A covariance of each of the filters is indicative of a probability of degradation of a sensor from which the navigation parameter is derived. Outputs of the Kalman filters are provided to a master filter. The master filter is compared to a criterion to determine whether there are indicia of a degraded sensor. If such an indicia are present, the Policy is consulted to determine which of the sensors are degraded. Consideration of degraded sensors when navigating a vehicle is inhibited.
    Type: Application
    Filed: September 11, 2020
    Publication date: December 7, 2023
    Inventors: Taehwan Kim, Kenneth L. Moore, James T. Landon, Jarrett M. Perry, Benjamin J. Graham