Patents by Inventor Tang Zhiwei

Tang Zhiwei 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).

  • Servomotor driving controller
    Patent number: 7084596
    Abstract: A servomotor driving controller capable of highly accurate machining, which prevents a quadrant projection upon change in the quadrant where machining is made. After the position deviation converges to zero by means of learning control, the velocity command or a difference between the velocity command and the commanded velocity which is the derivative of the position command is stored as velocity correction data. Until a predetermined time period elapses from when the sign of the position command is reversed, an amount of correction for each period of position loop processing is determined based on the correction data, and used to correct the velocity command.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: August 1, 2006
    Assignee: Fanuc Ltd
    Inventors: Yasusuke Iwashita, Hiroyuki Kawamura, Tang Zhiwei
  • Servomotor driving controller
    Publication number: 20040183495
    Abstract: A servomotor driving controller capable of highly accurate machining, which prevents a quadrant projection upon change in the quadrant where machining is made. After the position deviation converges to zero by means of learning control, the velocity command or a difference between the velocity command and the commanded velocity which is the derivative of the position command is stored as velocity correction data. Until a predetermined time period elapses from when the sign of the position command is reversed, an amount of correction for each period of position loop processing is determined based on the correction data, and used to correct the velocity command.
    Type: Application
    Filed: January 30, 2004
    Publication date: September 23, 2004
    Applicant: Fanuc Ltd.
    Inventors: Yasusuke Iwashita, Hiroyuki Kawamura, Tang Zhiwei