Patents by Inventor Steven L. Hardt

Steven L. Hardt 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).

  • Phase lock loop based system and method for decomposing and tracking decomposed frequency components of a signal, with application to vibration compensation system
    Patent number: 5710720
    Abstract: Disclosed is a system for decomposing an original signal of arbitrary frequency content into a user determined plurality of signals, each of which signals is centered about a variable center frequency. The system of the present invention utilizes a Bank of a plurality of combination Phase Lock Loop and associated Band Pass Filter Bank Components, the Center Frequency of a Frequency Pass Band of each of said Band Pass Filters being effected by use of a signal input thereto, and output by, an associated Phase Lock Loop. The present invention system is particularly well suited for application in the compensation of vibrations in a physical system as sensed by sensors located therein to sense feed-forward and/or feed-back vibration signals.
    Type: Grant
    Filed: August 1, 1996
    Date of Patent: January 20, 1998
    Assignee: Board of Regents of the University of Nebraska
    Inventors: Marcelo C. Algrain, Steven L. Hardt, Douglas E. Ehlers