Patents by Inventor Pattabiraman Trichy RAMAKRISHNAN

Pattabiraman Trichy RAMAKRISHNAN 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).

  • Method of identifying a fault in a system of gears in a wind turbine
    Patent number: 11333131
    Abstract: A method of identifying a fault in a system of gears in a wind turbine is provided. The method determines two or more centre harmonic frequency amplitudes according to vibrations of the system of gears and determines a plurality of sideband amplitudes of each of the centre harmonic frequency amplitudes. Further, the method sums the centre harmonic frequency amplitudes to calculate a total centre harmonic frequency amplitude and sums each of the sideband amplitudes of the centre harmonic frequency amplitudes to calculate a total sideband amplitude. The method then determines a value indicative of damage incurred by the system of gears based upon the first centre harmonic frequency amplitude and the average sideband amplitude.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: May 17, 2022
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Pattabiraman Trichy Ramakrishnan, Mallikarjun Narayanpur
  • METHOD OF IDENTIFYING A FAULT IN A SYSTEM OF GEARS IN A WIND TURBINE
    Publication number: 20210239098
    Abstract: A method of identifying a fault in a system of gears in a wind turbine is provided. The method determines two or more centre harmonic frequency amplitudes according to vibrations of the system of gears and determines a plurality of sideband amplitudes of each of the centre harmonic frequency amplitudes. Further, the method sums the centre harmonic frequency amplitudes to calculate a total centre harmonic frequency amplitude and sums each of the sideband amplitudes of the centre harmonic frequency amplitudes to calculate a total sideband amplitude. The method then determines a value indicative of damage incurred by the system of gears based upon the first centre harmonic frequency amplitude and the average sideband amplitude.
    Type: Application
    Filed: May 4, 2017
    Publication date: August 5, 2021
    Inventors: Pattabiraman Trichy RAMAKRISHNAN, Mallikarjun NARAYANPUR
  • Method of identifying a fault in a system of gears in a wind turbine
    Patent number: 11047364
    Abstract: A method of identifying a fault in a system of gears in a wind turbine is provided. The method determines a first centre harmonic frequency amplitude according to vibrations of the system of gears and determines a plurality of sideband amplitudes of the first centre harmonic frequency amplitude. Further, the method calculates an average sideband amplitude from the plurality of sideband amplitudes and determines a value indicative of damage incurred by the system of gears based upon the first centre harmonic frequency amplitude and the average sideband amplitude. The centre harmonic frequencies may be harmonic tooth mesh frequencies and the value indicative of damage may be a ratio of the centre harmonic frequency amplitude and a difference between the centre harmonic frequency amplitude and the associated average sideband amplitude or vice versa. The method may analyse the value of any ratio obtained and use the ratio values to identify, and monitor the progress of, a fault.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: June 29, 2021
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Pattabiraman Trichy Ramakrishnan, Mallikarjun Narayanpur
  • METHOD OF IDENTIFYING A FAULT IN A SYSTEM OF GEARS IN A WIND TURBINE
    Publication number: 20190154007
    Abstract: A method of identifying a fault in a system of gears in a wind turbine is provided. The method determines a first centre harmonic frequency amplitude according to vibrations of the system of gears and determines a plurality of sideband amplitudes of the first centre harmonic frequency amplitude. Further, the method calculates an average sideband amplitude from the plurality of sideband amplitudes and determines a value indicative of damage incurred by the system of gears based upon the first centre harmonic frequency amplitude and the average sideband amplitude. The centre harmonic frequencies may be harmonic tooth mesh frequencies and the value indicative of damage may be a ratio of the centre harmonic frequency amplitude and a difference between the centre harmonic frequency amplitude and the associated average sideband amplitude or vice versa. The method may analyse the value of any ratio obtained and use the ratio values to identify, and monitor the progress of, a fault.
    Type: Application
    Filed: May 4, 2017
    Publication date: May 23, 2019
    Inventors: Pattabiraman Trichy RAMAKRISHNAN, Mallikarjun NARAYANPUR