Patents by Inventor Quanhe Ma

Quanhe Ma 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).

  • Real time machine tool error correction using global differential wet modeling
    Patent number: 6269284
    Abstract: A machine tool is controlled through a process incorporating the steps of (1) measuring geometric and thermal errors with accurate instruments, (2) creating a global differential wet model of machine tool position, and (3) using this model to control real time compensation of machine tool operation. A controller modifies encoder-type position feedback signals used by the machine to compensate for geometric and thermal errors in the manner dictated by the global differential wet model.
    Type: Grant
    Filed: April 20, 1998
    Date of Patent: July 31, 2001
    Inventors: Kam C. Lau, Quanhe Ma, Herbert Lau