Patents by Inventor Wan-Kai Shen

Wan-Kai Shen 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).

  • Motion control servo loop apparatus
    Patent number: 8090455
    Abstract: A motion control servo loop apparatus, comprising: a feed-forward control module, and a proportional-integral-derivative (PID) control loop and a compensation adder. The feed-forward control module is capable of generating a feed-forward compensation. The PID control loop further comprises: a proportional control module, an integral control module and a derivative control module. The proportional control module is capable of generating a proportional compensation. The derivative control module is capable of generating a derivative compensation. The integral control module uses a digital differential analyzer (DDA) algorithm to perform integration for accumulated errors with respect to each sampling clock at each DDA pulse and thus output an accumulated error, which is then processed to generate an integral compensation.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: January 3, 2012
    Assignee: Industrial Technology Research Institute
    Inventors: Ying-Min Chen, Wen-Chuan Chen, Jing-Yi Huang, Cheng-Xue Wu, Chia-Ching Lin, Wan-Kai Shen
  • MOTION CONTROL SERVO LOOP APPARATUS
    Publication number: 20100152868
    Abstract: A motion control servo loop apparatus, comprising: a feed-forward control module, and a proportional-integral-derivative (PID) control loop and a compensation adder. The feed-forward control module is capable of generating a feed-forward compensation. The PID control loop further comprises: a proportional control module, an integral control module and a derivative control module. The proportional control module is capable of generating a proportional compensation. The derivative control module is capable of generating a derivative compensation. The integral control module uses a digital differential analyzer (DDA) algorithm to perform integration for accumulated errors with respect to each sampling clock at each DDA pulse and thus output an accumulated error, which is then processed to generate an integral compensation.
    Type: Application
    Filed: May 15, 2009
    Publication date: June 17, 2010
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Ying-Min Chen, Wen-Chuan Chen, Jing-Yi Huang, Cheng-Xue Wu, Chia-Ching Lin, Wan-Kai Shen