Patents by Inventor Leonid Moiseevich GELMAN

Leonid Moiseevich GELMAN 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).

  • Methods of analysing apparatus
    Patent number: 10352823
    Abstract: Engine health monitoring is used to assess the health of an engine, such as a gas turbine engine. Blades mounted on a shaft produce a modal response when excited. The shaft has an order related component that varies with the rotational velocity of the shaft. Modal responses are increased when the natural frequency range of the selected blade mode intersects with one of the order related components. By applying a short time chirp-Fourier transform with a frequency speed that is a function of a rate of change in the rotational velocity of the shaft a selected signal can be isolated. Cracks in the blades can be detected from the isolated signal.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: July 16, 2019
    Assignee: ROLLS-ROYCE plc
    Inventors: Paul Anuzis, Leonid Moiseevich Gelman
  • METHODS OF ANALYSING APPARATUS
    Publication number: 20160187227
    Abstract: Engine health monitoring is used to assess the health of an engine, such as a gas turbine engine. Blades mounted on a shaft produce a modal response when excited. The shaft has an order related component that varies with the rotational velocity of the shaft. Modal responses are increased when the natural frequency range of the selected blade mode intersects with one of the order related components. By applying a short time chirp-Fourier transform with a frequency speed that is a function of a rate of change in the rotational velocity of the shaft a selected signal can be isolated. Cracks in the blades can be detected from the isolated signal.
    Type: Application
    Filed: February 9, 2016
    Publication date: June 30, 2016
    Applicant: ROLLS-ROYCE plc
    Inventors: Paul ANUZIS, Leonid Moiseevich GELMAN
  • METHODS OF ANALYSING APPARATUS
    Publication number: 20140180606
    Abstract: Engine health monitoring is used to assess the health of an engine, such as a gas turbine engine. Blades mounted on a shaft produce a modal response when excited. The shaft has an order related component that varies with the rotational velocity of the shaft. Modal responses are increased when the natural frequency range of the selected blade mode intersects with one of the order related components. By applying a short time chirp-Fourier transform with a frequency speed that is a function of a rate of change in the rotational velocity of the shaft a selected signal can be isolated. Cracks in the blades can be detected from the isolated signal.
    Type: Application
    Filed: July 5, 2013
    Publication date: June 26, 2014
    Inventors: Paul ANUZIS, Leonid Moiseevich GELMAN