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Multiple input electrode gap controller

United States Patent

5,930,284
July 27, 1999
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
A method and apparatus for controlling vacuum arc remelting (VAR) furnaces by estimation of electrode gap based on a plurality of secondary estimates derived from furnace outputs. The estimation is preferably performed by Kalman filter. Adaptive gain techniques may be employed, as well as detection of process anomalies such as glows.
Hysinger; Christopher L. (Austin, TX), Beaman; Joseph J. (Austin, TX), Melgaard; David K. (Albuquerque, NE), Williamson; Rodney L. (Albuquerque, NE)
Sandia Corporation (Albuquerque, NM)
08/ 784,334
January 15, 1997
GOVERNMENT RIGHTS The Government has rights to this invention pursuant to Contract No. DE-AC04-94AL85000 awarded by the U.S. Department of Energy.