Patents by Inventor Reza PEDRAMI

Reza PEDRAMI 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).

  • Dynamically detecting resonating frequencies of resonating structures
    Patent number: 9099980
    Abstract: There is described herein a real-time scheme, implementable in software, hardware, or a combination thereof, to detect a resonating frequency of a structure from a sensed signal and dynamically set the center frequency of an adaptive compensator for effective attenuation of the resonating frequency.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: August 4, 2015
    Assignee: PRATT & WHITNEY CANADA CORP
    Inventors: Poi Loon Tang, Teuvo Saario, Reza Pedrami
  • DYNAMICALLY DETECTING RESONATING FREQUENCIES OF RESONATING STRUCTURES
    Publication number: 20140327489
    Abstract: There is described herein a real-time scheme, implementable in software, hardware, or a combination thereof, to detect a resonating frequency of a structure from a sensed signal and dynamically set the center frequency of an adaptive compensator for effective attenuation of the resonating frequency.
    Type: Application
    Filed: May 6, 2013
    Publication date: November 6, 2014
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventors: Poi Loon TANG, Teuvo SAARIO, Reza PEDRAMI
  • Resonant mode damping system and method
    Patent number: 8829701
    Abstract: A control system for increasing the damping of a resonant mode of a rotor drive train is provided. A control loop is introduced in parallel with the free turbine speed governing control loop. The control loop receives a feedback signal from the free turbine and rotor drive train, the feedback signal representative of the free turbine speed. The control loop extracts the resonant component from the feedback signal to generate a resonant signal containing the resonant component and estimates a derivative of the free turbine speed from the resonant signal. The control loop then outputs a request for damping the resonant mode on the basis of the derivative. A narrow-band reject filter is introduced in the free turbine speed governing loop to filter out the resonant component from the feedback signal, thereby ensuring that the free turbine speed governing loop does not interfere with the control loop.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: September 9, 2014
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Peter Ficklscherer, Reza Pedrami
  • RESONANT MODE DAMPING SYSTEM AND METHOD
    Publication number: 20140103884
    Abstract: A control system for increasing the damping of a resonant mode of a rotor drive train is provided. A control loop is introduced in parallel with the free turbine speed governing control loop. The control loop receives a feedback signal from the free turbine and rotor drive train, the feedback signal representative of the free turbine speed. The control loop extracts the resonant component from the feedback signal to generate a resonant signal containing the resonant component and estimates a derivative of the free turbine speed from the resonant signal. The control loop then outputs a request for damping the resonant mode on the basis of the derivative. A narrow-band reject filter is introduced in the free turbine speed governing loop to filter out the resonant component from the feedback signal, thereby ensuring that the free turbine speed governing loop does not interfere with the control loop.
    Type: Application
    Filed: October 11, 2012
    Publication date: April 17, 2014
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventors: Peter FICKLSCHERER, Reza PEDRAMI