Patents by Inventor Khanh T. NGO

Khanh T. NGO 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).

  • Patent number: 9486825
    Abstract: A control system is disclosed having at least one spray head, a fluid pump, and a power converter driving the fluid pump. The control system may also have an interface device to receive at least one parameter associated with a desired fluid delivery event, a pressure sensor configured to generate a first signal, a travel speed sensor configured to generate a second signal, and a controller. The controller may be configured to determine a desired fluid pressure based on the at least one parameter, and determine a control command for the power converter based on the desired fluid pressure. The controller may be further configured to determine a feedforward gain parameter based on the at least one parameter and the second signal, determine a feedback gain parameter based on a difference between desired and actual fluid pressures, and adjust the control command based on the feedforward and feedback gain parameters.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: November 8, 2016
    Assignee: Caterpillar Inc.
    Inventors: Khanh T. Ngo, David C. Freeman, Peter W. Anderton, Balamurugesh Thirunavukarasu
  • Publication number: 20140061329
    Abstract: A control system is disclosed having at least one spray head, a fluid pump, and a power converter driving the fluid pump. The control system may also have an interface device to receive at least one parameter associated with a desired fluid delivery event, a pressure sensor configured to generate a first signal, a travel speed sensor configured to generate a second signal, and a controller. The controller may be configured to determine a desired fluid pressure based on the at least one parameter, and determine a control command for the power converter based on the desired fluid pressure. The controller may be further configured to determine a feedforward gain parameter based on the at least one parameter and the second signal, determine a feedback gain parameter based on a difference between desired and actual fluid pressures, and adjust the control command based on the feedforward and feedback gain parameters.
    Type: Application
    Filed: August 29, 2012
    Publication date: March 6, 2014
    Inventors: Khanh T. NGO, David C. FREEMAN, Peter W. ANDERTON, Balamurugesh THIRUNAVUKARASU