Patents by Inventor Yshihisa Iwaki

Yshihisa Iwaki 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).

  • Controller for controlling a plant
    Patent number: 7305297
    Abstract: The present invention provides a controller for controlling a modeled plant robustly against disturbance. The controller comprises an estimator and a control unit. The estimator estimates disturbance applied to the plant. The control unit determines an input to the plant so that an output of the plant converges to a desired value. The input to the plant is determined to include a value obtained by multiplying the estimated disturbance by a predetermined gain. Since estimated disturbance is reflected in the input to the plant, control having robustness against disturbance is implemented. The controller may comprise a state predictor. The state predictor predicts the output of the plant based on the estimated disturbance and dead time included in the plant. The control unit determined the input to the plant so that the predicted output converges to a desired value. Since the state predictor allows for the dead time, the accuracy of the control is improved.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: December 4, 2007
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuji Yasui, Kanako Shimojo, Eiji Hashimoto, Yshihisa Iwaki
  • Controller for controlling a plant
    Publication number: 20070100535
    Abstract: The present invention provides a controller for controlling a modeled plant robustly against disturbance. The controller comprises an estimator and a control unit. The estimator estimates disturbance applied to the plant. The control unit determines an input to the plant so that an output of the plant converges to a desired value. The input to the plant is determined to include a value obtained by multiplying the estimated disturbance by a predetermined gain. Since estimated disturbance is reflected in the input to the plant, control having robustness against disturbance is implemented. The controller may comprise a state predictor. The state predictor predicts the output of the plant based on the estimated disturbance and dead time included in the plant. The control unit determined the input to the plant so that the predicted output converges to a desired value. Since the state predictor allows for the dead time, the accuracy of the control is improved.
    Type: Application
    Filed: December 21, 2006
    Publication date: May 3, 2007
    Inventors: Yuji Yasui, Kanako Shimojo, Eiji Hashimoto, Yshihisa Iwaki
  • Controller for controlling a plant
    Patent number: 7200484
    Abstract: The present invention provides a controller for controlling a modeled plant robustly against disturbance. The controller comprises an estimator and a control unit. The estimator estimates disturbance applied to the plant. The control unit determines an input to the plant so that an output of the plant converges to a desired value. The input to the plant is determined to include a value obtained by multiplying the estimated disturbance by a predetermined gain. Since estimated disturbance is reflected in the input to the plant, control having robustness against disturbance is implemented. The controller may comprise a state predictor. The state predictor predicts the output of the plant based on the estimated disturbance and dead time included in the plant. The control unit determined the input to the plant so that the predicted output converges to a desired value. Since the state predictor allows for the dead time, the accuracy of the control is improved.
    Type: Grant
    Filed: March 8, 2004
    Date of Patent: April 3, 2007
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuji Yasui, Kanako Shimojo, Eiji Hashimoto, Yshihisa Iwaki