Patents by Inventor Eric J. Manders

Eric J. Manders 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).

  • Qualitative diagnosis system and method
    Patent number: 7181374
    Abstract: A system and method for predicting the behavior of a complex physical system with a qualitative analysis by correctly handling algebraic loops in physical system models for diagnosis applications. This approach recognizes the presence of negative feedback effects in loop structures and analyses these effects by tracking the entry point into the algebraic loop to resolve conflicting predictions.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: February 20, 2007
    Assignee: Vanderbilt University
    Inventors: Pieter J. Mosterman, Eric J. Manders, Gautam Biswas
  • Methods for condition monitoring and system-level diagnosis of electro-mechanical systems with multiple actuating components operating in multiple regimes
    Patent number: 6539343
    Abstract: The present invention discloses methods for condition-based monitoring of a system and its components using joint time-frequency analysis and signal demodulation. A first method allows construction of models of non-stationary signals having multiple time and frequency scales of interest. In particular, the method uses wavelet analysis to encode essential information in time-frequency transformations and provides a signal model for an operating fault or normal operation of a system of interest. A second method uses the signal models for condition-based monitoring to detect a change in a signal. In this method, the signal models are correlated with sensor signals to determine the operating condition of a system or system component. A third method for condition-based monitoring uses signal demodulation. In this method, a nominal response of a system component is subtracted from a detected signal to more reliably detect subtle changes in the signal due to component degradation.
    Type: Grant
    Filed: February 3, 2000
    Date of Patent: March 25, 2003
    Assignee: Xerox Corporation
    Inventors: Feng Zhao, Eric-J. Manders
  • Methods for condition monitoring and system-level diagnosis of electro-mechanical systems with multiple actuating components operating in multiple regimes
    Publication number: 20020103626
    Abstract: The present invention discloses methods for condition-based monitoring of a system and its components using joint time-frequency analysis and signal demodulation. A first method allows construction of models of non-stationary signals having multiple time and frequency scales of interest. In particular, the method uses wavelet analysis to encode essential information in time-frequency transformations and provides a signal model for an operating fault or normal operation of a system of interest. A second method uses the signal models for condition-based monitoring to detect a change in a signal. In this method, the signal models are correlated with sensor signals to determine the operating condition of a system or system component. A third method for condition-based monitoring uses signal demodulation. In this method, a nominal response of a system component is subtracted from a detected signal to more reliably detect subtle changes in the signal due to component degradation.
    Type: Application
    Filed: February 3, 2000
    Publication date: August 1, 2002
    Inventors: Feng Zhao, Eric J. Manders