Patents by Inventor Sekhar Tangirala

Sekhar Tangirala 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).

  • Underwater investigation system providing unmanned underwater vehicle (UUV) guidance based upon updated position state estimates and related methods
    Patent number: 8442709
    Abstract: An underwater investigation system may include a host ship, a UUV including a propulsion device and a steering device, and at least one sonar system. The system may further include a guidance controller configured to initiate sonar range measurements between the host ship and the UUV using the at least one sonar system, and estimate a respective UUV position state relative to the host ship at the initiation of at least some of the sonar range value measurements to define a series of successive UUV position state estimates. The guidance controller may be further configured to update UUV position state estimates in the series based upon completion of their respective sonar range measurements, propagate the updates to subsequent UUV position state estimates in the series, and control the propulsion device and the steering device to guide movement of the UUV relative to the host ship based upon the updated position state estimates.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: May 14, 2013
    Assignee: Lockheed Martin Corporation
    Inventors: Louis J. Larkin, Martin Juliano, Katherine Janney, Sekhar Tangirala
  • UNDERWATER INVESTIGATION SYSTEM PROVIDING UNMANNED UNDERWATER VEHICLE (UUV) GUIDANCE BASED UPON UPDATED POSITION STATE ESTIMATES AND RELATED METHODS
    Publication number: 20110144836
    Abstract: An underwater investigation system may include a host ship, a UUV including a propulsion device and a steering device, and at least one sonar system. The system may further include a guidance controller configured to initiate sonar range measurements between the host ship and the UUV using the at least one sonar system, and estimate a respective UUV position state relative to the host ship at the initiation of at least some of the sonar range value measurements to define a series of successive UUV position state estimates. The guidance controller may be further configured to update UUV position state estimates in the series based upon completion of their respective sonar range measurements, propagate the updates to subsequent UUV position state estimates in the series, and control the propulsion device and the steering device to guide movement of the UUV relative to the host ship based upon the updated position state estimates.
    Type: Application
    Filed: December 11, 2009
    Publication date: June 16, 2011
    Applicant: Lockheed Martin Corporation, Corporation of the State of Delaware
    Inventors: Louis J. Larkin, Martin Juliano, Katherine Janney, Sekhar Tangirala