Patents by Inventor Ang Qian

Ang Qian 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).

  • Proportional control using state space based scheduling
    Publication number: 20120253609
    Abstract: A method for proportional state space based scheduling of gain within a machine includes generating a speed error value and when the speed error value is substantially nonzero producing an implement position difference value representing the amount by which an implement position differs from a position that would provide a desired machine speed. The method then converts the implement position difference value to a desired implement position command and differences the desired implement position command and a position signal indicative of the current implement position to produce an implement difference value.
    Type: Application
    Filed: March 31, 2011
    Publication date: October 4, 2012
    Applicant: CATERPILLAR INC.
    Inventors: Wei Li, Ang Qian, Ryan Kingdon, Steven Krause, Norval Thomson
  • TOOL CONTROL SYSTEM HAVING CONFIGURATION DETECTION
    Publication number: 20120059553
    Abstract: A tool control system for a scraper is disclosed. The tool control system may have a tool, a first tool actuator configured to move the tool, and a first sensor configured to detect a position parameter of at least one of the tool and the first tool actuator and to generate a corresponding first signal. The tool control system may also have a tool member operatively connected to the tool, a second tool actuator connectable to the tool member in a plurality of configurations to move the tool member, and a second sensor configured to detect a position parameter of at least one of the tool member and the second tool actuator and to generate a corresponding second signal. The tool control system may further have a controller configured to make a comparison of the first and second signals, and to determine a current connection configuration based on the comparison.
    Type: Application
    Filed: September 2, 2010
    Publication date: March 8, 2012
    Inventors: Eric N. Polston, Keith R. Kosowski, Ryan A. Kingdon, Romona D. Cone, Yan Bai Ma, Christopher A. Wahlmark, Donna K. Laube, Ashok Krishnan, Benjamin D. Drake, Ang Qian, Steven R. Krause
  • TOOL CONTROL SYSTEM HAVING CONFIGURATION DETECTION
    Publication number: 20120055051
    Abstract: A tool control system for a scraper is disclosed. The tool control system may have a tool, a first tool actuator configured to move the tool, and a first sensor configured to detect a position parameter of at least one of the tool and the first tool actuator and to generate a corresponding first signal. The tool control system may also have a tool member operatively connected to the tool, a second tool actuator connectable to the tool member in a plurality of configurations to move the tool member, and a second sensor configured to detect a position parameter of at least one of the tool member and the second tool actuator and to generate a corresponding second signal. The tool control system may further have a controller configured to make a comparison of the first and second signals, and to determine a current connection configuration based on the comparison.
    Type: Application
    Filed: April 22, 2011
    Publication date: March 8, 2012
    Inventors: Eric N. Polston, Keith R. Kosowski, Ryan A. Kingdon, Ramona D. Cone, Yan Ma, Christopher A. Wahlmark, Donna K. Laube, Ashok Krishnan, Benjamin D. Drake, Ang Qian, Steven R. Krause