Patents by Inventor Daisuke Notsu

Daisuke Notsu 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: 12280842
    Abstract: A control device includes a reaction force controller to generate an input torque input to the control target and control a reaction force transmitted from a steering wheel to a steering person, an assist controller to generate a correction torque to correct the input torque based on an output of the control target and a nominal model, and a state feedback circuit to feed back a state compensation value to the input torque based on the output of the control target. The assist controller is configured or programmed such that the transfer function of the control target is constrained by the transfer function of the nominal model in the frequency band where the gain in the gain characteristic of the complementary sensitivity function with respect to the modeling error between the control target and the nominal model is approximately 1.
    Type: Grant
    Filed: December 21, 2022
    Date of Patent: April 22, 2025
    Assignee: NIDEC CORPORATION
    Inventors: Shuji Endo, Sohei Miyake, Masaya Ishikawa, Daisuke Notsu
  • Patent number: 12195107
    Abstract: A control device that controls a control target including at least a motor in a steering mechanism including an input shaft to which a steering wheel is connected, an output shaft connected to the input shaft via a torsion bar, and the motor connected to the output shaft. The control device includes a reaction force controller to generate an input torque input to the control target based on a torsion bar torque generated in the torsion bar and to control a reaction force transmitted from the steering wheel to the steering person, and an assist controller to generate a correction torque to correct the input torque based on an output of the control target and a nominal model. The assist controller is configured or programmed such that a transfer function of the control target is constrained by a transfer function of the nominal model in a frequency band.
    Type: Grant
    Filed: December 21, 2022
    Date of Patent: January 14, 2025
    Assignee: NIDEC CORPORATION
    Inventors: Shuji Endo, Sohei Miyake, Masaya Ishikawa, Daisuke Notsu
  • Publication number: 20250010915
    Abstract: A control device that controls a steering mechanism mounted on a vehicle includes a first assist controller to execute lane keeping control and generate a first input value. The first assist controller includes a vehicle state calculator to calculate a yaw rate target value and lateral displacement, a yaw rate controller to generate a yaw rate command value based on the yaw rate target value, and a lateral displacement controller to generate a lateral displacement command value based on the lateral displacement. The yaw rate controller includes a yaw rate adjuster to adjust the yaw rate command value according to a frequency. The lateral displacement controller includes a lateral displacement adjuster to adjust the lateral displacement command value according to a frequency.
    Type: Application
    Filed: June 26, 2024
    Publication date: January 9, 2025
    Inventors: Shuji ENDO, Sohei MIYAKE, Daisuke NOTSU
  • Publication number: 20250002075
    Abstract: A control device includes a model following controller in which a transfer function of a control target is restricted to a transfer function of a nominal model in a frequency band in which a complementary sensitivity gain, which is a gain in a gain characteristic of a complementary sensitivity function with respect to a modeling error between the control target and the nominal model, is approximately one. A steady gain of the complementary sensitivity function is about 0.1 or more. A lower limit value of a frequency band in which the complementary sensitivity gain is about one is higher than a first resonance frequency that is a resonance frequency of a yaw rate of a vehicle. A second resonance frequency is higher than the first resonance frequency and lower than a lower limit value of a frequency band in which the complementary sensitivity gain is about one.
    Type: Application
    Filed: June 26, 2024
    Publication date: January 2, 2025
    Inventors: Shuji ENDO, Sohei MIYAKE, Daisuke NOTSU
  • Publication number: 20250002074
    Abstract: A control device includes a first assist controller to execute lane keeping control and generate a first input value, a second assist controller to generate a second input value based on a steering input value, and a disturbance sensitivity controller to which a command value calculated based on the first input value multiplied by a first gain and the second input value multiplied by a second gain is input. When the first gain is K1 and the second gain is K2, K1=1?K2 is satisfied. The disturbance sensitivity controller includes a first model following controller to generate a correction value to correct a command value based on output of a control target and a first nominal model. The first model following controller is configured or programmed such that a transfer function of the control target is restricted to a transfer function of the first nominal model.
    Type: Application
    Filed: June 26, 2024
    Publication date: January 2, 2025
    Inventors: Shuji ENDO, Sohei MIYAKE, Daisuke NOTSU
  • Publication number: 20250002076
    Abstract: A control device mounted on a steer-by-wire steering device mounted on a vehicle includes a steering assembly including a steering wheel to be steered by a steering operator, a turning assembly including a first turning wheel and a second turning wheel, a turning side motor to drive the turning assembly, and a turning side controller configured or programmed to control a control target including the turning side motor. The turning side controller is configured or programmed to include a model following controller configured or programmed to generate a correction torque to correct an input torque input to the control target based on output of the control target and a nominal model based on a configuration of the control target. The model following controller is configured or programmed such that a transfer function of the control target is restricted to a transfer function of the nominal model.
    Type: Application
    Filed: June 26, 2024
    Publication date: January 2, 2025
    Inventors: Shuji ENDO, Sohei MIYAKE, Daisuke NOTSU
  • Publication number: 20230264474
    Abstract: An inkjet printing head includes a piezoelectric element that includes a lower electrode disposed on a movable film, a piezoelectric film formed on the lower electrode, and an upper electrode formed on the piezoelectric film, a hydrogen barrier film that covers, in a front surface of the piezoelectric element, at least, entireties of side surfaces of the upper electrode, the piezoelectric film, and the lower electrode, at least a part of an upper surface of the upper electrode, and an upper surface of the lower electrode, a first interlayer insulating film formed on a front surface other than an end surface of the hydrogen barrier film, a second interlayer insulating film formed so as to cover the end surface of the hydrogen barrier film and the first interlayer insulating film, and a wiring that is formed on the second interlayer insulating film and that is connected to the piezoelectric element.
    Type: Application
    Filed: July 6, 2021
    Publication date: August 24, 2023
    Inventors: Eitaro KUROKAWA, Osamu MATSUSHIMA, Noriyuki SHIMOJI, Tatsuya SUZUKI, Daisuke NOTSU
  • Publication number: 20230202554
    Abstract: A control device that controls a control target including at least a motor in a steering mechanism including an input shaft to which a steering wheel is connected, an output shaft connected to the input shaft via a torsion bar, and the motor connected to the output shaft. The control device includes a reaction force controller to generate an input torque input to the control target based on a torsion bar torque generated in the torsion bar and to control a reaction force transmitted from the steering wheel to the steering person, and an assist controller to generate a correction torque to correct the input torque based on an output of the control target and a nominal model. The assist controller is configured or programmed such that a transfer function of the control target is constrained by a transfer function of the nominal model in a frequency band.
    Type: Application
    Filed: December 21, 2022
    Publication date: June 29, 2023
    Inventors: Shuji ENDO, Sohei MIYAKE, Masaya ISHIKAWA, Daisuke NOTSU
  • Publication number: 20230202560
    Abstract: A control device includes a reaction force controller to generate an input torque input to the control target and control a reaction force transmitted from a steering wheel to a steering person, an assist controller to generate a correction torque to correct the input torque based on an output of the control target and a nominal model, and a state feedback circuit to feed back a state compensation value to the input torque based on the output of the control target. The assist controller is configured or programmed such that the transfer function of the control target is constrained by the transfer function of the nominal model in the frequency band where the gain in the gain characteristic of the complementary sensitivity function with respect to the modeling error between the control target and the nominal model is approximately 1.
    Type: Application
    Filed: December 21, 2022
    Publication date: June 29, 2023
    Inventors: Shuji ENDO, Sohei MIYAKE, Masaya ISHIKAWA, Daisuke NOTSU
  • Publication number: 20230202559
    Abstract: A control device includes a reaction force controller to generate an input torque input to a control target and control a reaction force transmitted to a steering person and an assist controller to generate a correction torque to correct the input torque based on an output of the control target and a nominal model. The assist controller includes a high-pass filter with a first cutoff frequency, a low-pass filter with a second cutoff frequency higher than the first cutoff frequency, and a disturbance compensation value calculator. When a transfer function of the low-pass filter is Q(s) and a transfer function of the high-pass filter is HPF(s), a transfer function of a control target is constrained by a transfer function of the nominal model in a frequency band in which a gain in a gain characteristic of Q(s)·HPF(s) is 1.
    Type: Application
    Filed: December 21, 2022
    Publication date: June 29, 2023
    Inventors: Shuji ENDO, Sohei MIYAKE, Masaya ISHIKAWA, Daisuke NOTSU
  • Patent number: 9064593
    Abstract: A data holding device includes a loop structure unit configured to hold data using a plurality of logic gates connected in a loop shape, a nonvolatile storage unit including a plurality of ferroelectric elements, the nonvolatile storage unit configured to store the data held in the loop structure unit in a nonvolatile manner using hysteresis characteristics of the ferroelectric elements, and a circuit separation unit configured to electrically separate the loop structure unit and the nonvolatile storage unit. The ferroelectric elements of the nonvolatile storage unit are surrounded by a dummy element smaller in width than the ferroelectric elements.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: June 23, 2015
    Assignee: Rohm Co., Ltd.
    Inventors: Yoshikazu Fujimori, Hiromitsu Kimura, Toshiyuki Kanaya, Daisuke Notsu
  • Publication number: 20150103580
    Abstract: A data holding device includes a loop structure unit configured to hold data using a plurality of logic gates connected in a loop shape, a nonvolatile storage unit including a plurality of ferroelectric elements, the nonvolatile storage unit configured to store the data held in the loop structure unit in a nonvolatile manner using hysteresis characteristics of the ferroelectric elements, and a circuit separation unit configured to electrically separate the loop structure unit and the nonvolatile storage unit. The ferroelectric elements of the nonvolatile storage unit are surrounded by a dummy element smaller in width than the ferroelectric elements.
    Type: Application
    Filed: December 18, 2014
    Publication date: April 16, 2015
    Inventors: Yoshikazu Fujimori, Hiromitsu Kimura, Toshiyuki Kanaya, Daisuke Notsu
  • Patent number: 8947904
    Abstract: A data holding device includes a loop structure unit configured to hold data using a plurality of logic gates connected in a loop shape, a nonvolatile storage unit including a plurality of ferroelectric elements, the nonvolatile storage unit configured to store the data held in the loop structure unit in a nonvolatile manner using hysteresis characteristics of the ferroelectric elements, and a circuit separation unit configured to electrically separate the loop structure unit and the nonvolatile storage unit. The ferroelectric elements of the nonvolatile storage unit are surrounded by a dummy element smaller in width than the ferroelectric elements.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: February 3, 2015
    Assignee: Rohm Co., Ltd.
    Inventors: Yoshikazu Fujimori, Hiromitsu Kimura, Toshiyuki Kanaya, Daisuke Notsu
  • Publication number: 20140362632
    Abstract: A data holding device includes a loop structure unit configured to hold data using a plurality of logic gates connected in a loop shape, a nonvolatile storage unit including a plurality of ferroelectric elements, the nonvolatile storage unit configured to store the data held in the loop structure unit in a nonvolatile manner using hysteresis characteristics of the ferroelectric elements, and a circuit separation unit configured to electrically separate the loop structure unit and the nonvolatile storage unit. The ferroelectric elements of the nonvolatile storage unit are surrounded by a dummy element smaller in width than the ferroelectric elements.
    Type: Application
    Filed: August 22, 2014
    Publication date: December 11, 2014
    Inventors: Yoshikazu Fujimori, Hiromitsu Kimura, Toshiyuki Kanaya, Daisuke Notsu
  • Patent number: 8837194
    Abstract: A data holding device includes a loop structure unit configured to hold data using a plurality of logic gates connected in a loop shape, a nonvolatile storage unit including a plurality of ferroelectric elements, the nonvolatile storage unit configured to store the data held in the loop structure unit in a nonvolatile manner using hysteresis characteristics of the ferroelectric elements, and a circuit separation unit configured to electrically separate the loop structure unit and the nonvolatile storage unit. The ferroelectric elements of the nonvolatile storage unit are surrounded by a dummy element smaller in width than the ferroelectric elements.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: September 16, 2014
    Assignee: Rohm Co., Ltd.
    Inventors: Yoshikazu Fujimori, Hiromitsu Kimura, Toshiyuki Kanaya, Daisuke Notsu
  • Publication number: 20120250392
    Abstract: A data holding device includes a loop structure unit configured to hold data using a plurality of logic gates connected in a loop shape, a nonvolatile storage unit including a plurality of ferroelectric elements, the nonvolatile storage unit configured to store the data held in the loop structure unit in a nonvolatile manner using hysteresis characteristics of the ferroelectric elements, and a circuit separation unit configured to electrically separate the loop structure unit and the nonvolatile storage unit. The ferroelectric elements of the nonvolatile storage unit are surrounded by a dummy element smaller in width than the ferroelectric elements.
    Type: Application
    Filed: March 30, 2012
    Publication date: October 4, 2012
    Applicant: Rohm Co., Ltd.
    Inventors: Yoshikazu Fujimori, Hiromitsu Kimura, Toshiyuki Kanaya, Daisuke Notsu