Patents by Inventor Elias B. Kosmatopoulos

Elias B. Kosmatopoulos 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).

  • Servo control apparatus and method using absolute value input signals
    Patent number: 6545836
    Abstract: A servo control apparatus and method controls systems at least partially on the basis of an observable variable that has an absolute value functional relationship with the controlled variable and does not change sign for positive and negative variations from a nominal value. When applied to the positional control of an object, the control system observes a value of a position error signal and maps that signal to two different potentially correct displacement values. Two estimators within the control system are initiated, one using the positive displacement and the other using the negative displacement, and the two estimators each predict the future position of the object and the corresponding position error signal for each estimated position. A new position error signal is detected and compared to the two estimated position error signals.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: April 8, 2003
    Assignee: Acorn Technologies, Inc.
    Inventors: Petros A. Ioannou, Elias B. Kosmatopoulos, Alvin M. Despain
  • Servo control appartaus and method using absolute value input signals
    Patent number: RE40545
    Abstract: A servo control apparatus and method controls systems at least partially on the basis of an observable variable that has an absolute value functional relationship with the controlled variable and does not change sign for positive and negative variations from a nominal value. When applied to the positional control of an object, the control system observes a value of a position error signal and maps that signal to two different potentially correct displacement values. Two estimators within the control system are initiated, one using the positive displacement and the other using the negative displacement, and the two estimators each predict the future position of the object and the corresponding position error signal for each estimated position. A new position error signal is detected and compared to the two estimated position error signals.
    Type: Grant
    Filed: April 8, 2005
    Date of Patent: October 21, 2008
    Assignee: Purchased Patent Management LLC
    Inventors: Petros A. Ioannou, Elias B. Kosmatopoulos, Alvin M. Despain