Patents by Inventor Alan John Varghese

Alan John Varghese 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).

  • System and method for determining the amplitude of oscillatory instabilities in fluid mechanical devices
    Patent number: 11573151
    Abstract: Embodiments herein provide a system (100) to estimate the amplitude of oscillations in a turbulent flow system (102) that exhibits oscillatory instabilities. The system (100) comprises of a sensor (102A) mounted on the turbulent flow system (102) to detect an oscillatory variable in the system obtaining a signal, a signal conditioner (104) that conditions the signal from the sensor, an amplitude estimator (110) that estimates the amplitude of the limit cycle oscillations, and also predict the proximity of the system to the oscillatory instability, a processor (108) connected to the amplitude estimator (110) to compare the predicted oscillation amplitude with a threshold value. The amplitude is estimated by estimating the spectral measure of the time series signal obtained from the system.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: February 7, 2023
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IITM)
    Inventors: Induja Pavithran, Vishnu Rajasekharan Unni, Alan John Varghese, Praveen Kasthuri, Raman Pillai Indusekharan Nair Sujith
  • SYSTEM AND METHOD FOR DETERMINING THE AMPLITUDE OF OSCILLATORY INSTABILITIES IN FLUID MECHANICAL DEVICES
    Publication number: 20210131910
    Abstract: Embodiments herein provide a system (100) to estimate the amplitude of oscillations in a turbulent flow system (102) that exhibits oscillatory instabilities. The system (100) comprises of a sensor (102A) mounted on the turbulent flow system (102) to detect an oscillatory variable in the system obtaining a signal, a signal conditioner (104) that conditions the signal from the sensor, an amplitude estimator (110) that estimates the amplitude of the limit cycle oscillations, and also predict the proximity of the system to the oscillatory instability, a processor (108) connected to the amplitude estimator (110) to compare the predicted oscillation amplitude with a threshold value. The amplitude is estimated by estimating the spectral measure of the time series signal obtained from the system.
    Type: Application
    Filed: July 23, 2019
    Publication date: May 6, 2021
    Inventors: Induja Pavithran, Vishnu Rajasekharan Unni, Alan John Varghese, Praveen Kasthuri, Raman Pillai Indusekharan Nair Sujith