Patents by Inventor James R. Gafford

James R. Gafford 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: 11747820
    Abstract: An improved retrofit assembly for ground support equipment providing autonomous operation of the logistics ground support equipment (GSE). The assembly has a refit control system attached to the GSE (with a vehicle dynamics control processor and a data preprocessing control processor), retrofitted proprioceptive sensors coupled to the vehicle dynamics control processor monitoring operating parameters and characteristics of the GSE, retrofitted exteroceptive sensors coupled to the data preprocessing control processor that monitor an exterior environment of the GSE, and refit actuators for different control elements on the GSE and to autonomously alter motion of the GSE. The refit control system programmatically receives sensor data from the proprioceptive sensors and exteroceptive sensors; optimizes a path for the GSE based upon the different sensor data; and activates at least one of the actuators according to the optimized path for the GSE.
    Type: Grant
    Filed: September 3, 2021
    Date of Patent: September 5, 2023
    Assignee: FEDEX CORPORATE SERVICES, INC.
    Inventors: Reuben F. Burch, V, Sherif Abelwahed, John E. Ball, Matt Doude, James R. Gafford, Tyler J. Hannis, Yucheng Liu, Michael S. Mazzola, Howard McKinney
  • Publication number: 20210397196
    Abstract: An improved retrofit assembly for ground support equipment providing autonomous operation of the logistics ground support equipment (GSE). The assembly has a refit control system attached to the GSE (with a vehicle dynamics control processor and a data preprocessing control processor), retrofitted proprioceptive sensors coupled to the vehicle dynamics control processor monitoring operating parameters and characteristics of the GSE, retrofitted exteroceptive sensors coupled to the data preprocessing control processor that monitor an exterior environment of the GSE, and refit actuators for different control elements on the GSE and to autonomously alter motion of the GSE. The refit control system programmatically receives sensor data from the proprioceptive sensors and exteroceptive sensors; optimizes a path for the GSE based upon the different sensor data; and activates at least one of the actuators according to the optimized path for the GSE.
    Type: Application
    Filed: September 3, 2021
    Publication date: December 23, 2021
    Inventors: Reuben F. Burch, V, Sherif Abelwahed, John E. Ball, Matt Doude, James R. Gafford, Tyler J. Hannis, Yucheng Liu, Michael S. Mazzola, Howard McKinney
  • Patent number: 11157011
    Abstract: An improved retrofit assembly for ground support equipment providing autonomous operation of the logistics ground support equipment (GSE). The assembly has a refit control system attached to the GSE (with a vehicle dynamics control processor and a data preprocessing control processor), retrofitted proprioceptive sensors coupled to the vehicle dynamics control processor monitoring operating parameters and characteristics of the GSE, retrofitted exteroceptive sensors coupled to the data preprocessing control processor that monitor an exterior environment of the GSE, and refit actuators for different control elements on the GSE and to autonomously alter motion of the GSE. The refit control system programmatically receives sensor data from the proprioceptive sensors and exteroceptive sensors; optimizes a path for the GSE based upon the different sensor data; and activates at least one of the actuators according to the optimized path for the GSE.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: October 26, 2021
    Inventors: Reuben F. Burch, V, Sherif Abelwahed, John E. Ball, Matt Doude, James R. Gafford, Tyler J. Hannis, Yucheng Liu, Michael S. Mazzola, Howard McKinney
  • Patent number: 10761538
    Abstract: Enhanced systems and methods for collision avoidance of a high value asset with reflective beacons around it using multi-sensor data fusion on a mobile industrial vehicle. The system has a sensing processing system with a LiDAR and camera sensors, and a multi-processor module responsive to the different sensors. The sensing processing system fuses the different sensor data to locate the reflective beacons. A model predictive controller on the vehicle determines possible control solutions where each defines a threshold allowable speed for the vehicle at discrete moments based upon an estimated path to a breaching point projected from the reflective beacons, and then identifies an optimal one of the control solutions based upon a performance cost function and associated with an optimal threshold allowable speed. The system has a vehicle actuator configured to respond and alter vehicle movement to avoid a collision when the vehicle exceeds the optimal threshold allowable speed.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: September 1, 2020
    Assignee: FEDEX CORPORATE SERVICES, INC.
    Inventors: John E. Ball, Reuben F. Burch, V, Lucas D. Cagle, Collin S. Davenport, James R. Gafford, Tyler J. Hannis, Andrew R. Hegman, Andrew M. LeClair, Yucheng Liu, Michael S. Mazzola, Howard G. McKinney, Tasmia Reza, Jian Shi, Pan Wei, Dennison W. Iacomini
  • Publication number: 20200033872
    Abstract: An improved retrofit assembly for ground support equipment providing autonomous operation of the logistics ground support equipment (GSE). The assembly has a refit control system attached to the GSE (with a vehicle dynamics control processor and a data preprocessing control processor), retrofitted proprioceptive sensors coupled to the vehicle dynamics control processor monitoring operating parameters and characteristics of the GSE, retrofitted exteroceptive sensors coupled to the data preprocessing control processor that monitor an exterior environment of the GSE, and refit actuators for different control elements on the GSE and to autonomously alter motion of the GSE. The refit control system programmatically receives sensor data from the proprioceptive sensors and exteroceptive sensors; optimizes a path for the GSE based upon the different sensor data; and activates at least one of the actuators according to the optimized path for the GSE.
    Type: Application
    Filed: July 29, 2019
    Publication date: January 30, 2020
    Inventors: Reuben F. Burch, V, Sherif Abelwahed, John E. Ball, Matt Doude, James R. Gafford, Tyler J. Hannis, Yucheng Liu, Michael S. Mazzola, Howard McKinney
  • Publication number: 20190265714
    Abstract: Enhanced systems and methods for collision avoidance of a high value asset with reflective beacons around it using multi-sensor data fusion on a mobile industrial vehicle. The system has a sensing processing system with a LiDAR and camera sensors, and a multi-processor module responsive to the different sensors. The sensing processing system fuses the different sensor data to locate the reflective beacons. A model predictive controller on the vehicle determines possible control solutions where each defines a threshold allowable speed for the vehicle at discrete moments based upon an estimated path to a breaching point projected from the reflective beacons, and then identifies an optimal one of the control solutions based upon a performance cost function and associated with an optimal threshold allowable speed. The system has a vehicle actuator configured to respond and alter vehicle movement to avoid a collision when the vehicle exceeds the optimal threshold allowable speed.
    Type: Application
    Filed: February 26, 2019
    Publication date: August 29, 2019
    Inventors: John E. Ball, Reuben F. Burch, V, Lucas D. Cagle, Collin S. Davenport, James R. Gafford, Tyler J. Hannis, Andrew R. Hegman, Andrew M. LeClair, Yucheng Liu, Michael S. Mazzola, Howard G. McKinney, Tasmia Reza, Jian Shi, Pan Wei, Dennison W. Iacomini
  • Patent number: 7978483
    Abstract: Components, systems and methods for generating variable frequency AC voltage from a DC power supply are described. The components include a full-bridge (FB) parallel load resonant (PLR) converter which operates in discontinuous conduction mode. The PLR converter includes MOSFETs in an H-bridge configuration and employs a topology which minimizes inductance. The PLR converter can be coupled to a single or poly-phase bridge for use as an inverter. The inverter can be used to produce an AC sinusoidal waveform from a low voltage, high current DC power supply. Systems and techniques for modulating the output from the PLR converter to produce an AC sinusoidal waveform having desired characteristics, including frequency and voltage, are also provided. The PLR converter can also be coupled to a rectifier for use as a DC-DC converter.
    Type: Grant
    Filed: January 13, 2009
    Date of Patent: July 12, 2011
    Assignee: Mississippi State University
    Inventors: Michael S. Mazzola, James R. Gafford
  • Publication number: 20100020581
    Abstract: Components, systems and methods for generating variable frequency AC voltage from a DC power supply are described. The components include a fullbridge (FB) parallel load resonant (PLR) converter which operates in discontinuous conduction mode. The PLR converter includes MOSFETs in an H-bridge configuration and employs a topology which minimizes inductance. The PLR converter can be coupled to a single or poly-phase bridge for use as an inverter. The inverter can be used to produce an AC sinusoidal waveform from a low voltage, high current DC power supply. Systems and techniques for modulating the output from the PLR converter to produce an AC sinusoidal waveform having desired characteristics, including frequency and voltage, are also provided. The PLR converter can also be coupled to a rectifier for use as a DC-DC converter.
    Type: Application
    Filed: January 13, 2009
    Publication date: January 28, 2010
    Applicant: MISSISSIPPI STATE UNIVERSITY
    Inventors: Michael S. Mazzola, James R. Gafford
  • Patent number: 7499290
    Abstract: Components, systems and methods for generating variable frequency AC voltage from a DC power supply are described. The components include a full-bridge (FB) parallel load resonant (PLR) converter which operates in discontinuous conduction mode. The PLR converter includes MOSFETs in an H-bridge configuration and employs a topology which minimizes inductance. The PLR converter can be coupled to a single or poly-phase bridge for use as an inverter. The inverter can be used to produce an AC sinusoidal waveform from a low voltage, high current DC power supply. Systems and techniques for modulating the output from the PLR converter to produce an AC sinusoidal waveform having desired characteristics, including frequency and voltage, are also provided. The PLR converter can also be coupled to a rectifier for use as a DC-DC converter.
    Type: Grant
    Filed: May 19, 2005
    Date of Patent: March 3, 2009
    Assignee: Mississippi State University
    Inventors: Michael S. Mazzola, James R. Gafford