Patents by Inventor Fukiko KAWAI

Fukiko KAWAI 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).

  • Method of control device and control device
    Patent number: 10409229
    Abstract: A method of designing a control device that controls a controlled variable of a plant to a set point, the control device including a feedback control system for outputting a manipulated variable of the plant based on an output of a feedback controller and a disturbance estimation value, including a step of selecting one of a first order transfer function, a second order transfer function, a third order transfer function, a first order and time delay transfer function, a second order and time delay transfer function, and a third order and time delay transfer function as a transfer function of the nominal plant in accordance with characteristics of the plant; and a step of determining a transfer function of the feedback controller based on a gain and time constant of the nominal plant.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: September 10, 2019
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Fukiko Kawai
  • DESIGN METHOD OF CONTROL DEVICE AND CONTROL DEVICE
    Publication number: 20150212498
    Abstract: A method of designing a control device that controls a controlled variable of a plant to a set point, the control device including a feedback control system for outputting a manipulated variable of the plant based on an output of a feedback controller and a disturbance estimation value, including a step of selecting one of a first order transfer function, a second order transfer function, a third order transfer function, a first order and time delay transfer function, a second order and time delay transfer function, and a third order and time delay transfer function as a transfer function of the nominal plant in accordance with characteristics of the plant; and a step of determining a transfer function of the feedback controller based on a gain and time constant of the nominal plant.
    Type: Application
    Filed: April 6, 2015
    Publication date: July 30, 2015
    Inventor: Fukiko KAWAI