Patents by Inventor Yuji Igarashi

Yuji Igarashi 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).

  • Publication number: 20150043662
    Abstract: In a charging communication system in which a charging control device performs communication between an electric vehicle and a charging equipment, the electric vehicle is equipped with a first communication device and a second communication device both configured to communicate with the charging equipment by using the same signal line in the charging cable; and a signal line connection device configured to switch connection/disconnection between the second communication device and the signal line. The charging control device, which controls a battery on the electric vehicle, calculates an amount of change in a signal line voltage between before and after the signal line connection device connects the second communication device to the signal line, and the charging control device causes, when the amount of change does not fall within a predetermined allowable range, the signal line connection device to disconnect the second communication device from the signal line.
    Type: Application
    Filed: April 1, 2013
    Publication date: February 12, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yuji Igarashi, Takashi Tamada, Yoichi Okubo, Takanori Matsunaga, Kazushi Shirasawa, Hiroyuki Kumazawa
  • Patent number: 8928267
    Abstract: To stably control a driving object to approach and contact a pressure object at a low impact, to suppress a vibration generated when the driving object presses the pressure object, and to enable a motor controller to operate based on a simple command, a regression torque controller of the motor controller limits a torque-control velocity command to up to a velocity limit value vlim defined based on a contact velocity between a driving object and a pressure object and outputs the torque-control velocity command, and a velocity controller of the motor controller calculates a torque command so that a motor velocity can follow the torque-control velocity command output from the regression torque controller.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: January 6, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuji Igarashi, Hidetoshi Ikeda, Kiyoshi Maekawa, Kei Terada
  • Patent number: 8902080
    Abstract: A vehicle-mounted narrow-band wireless communication apparatus includes: information storing/managing section 905 for storing and managing roadside information from a wireless communication unit and operating condition information from an operating condition detection unit 903; an information provision determination unit 904 for determining whether or not information can be provided on the basis of the roadside information and the operating condition information; an HMI output control unit 906 for controlling HMI output on the basis of a determination result from the information provision determination unit 904 and environment information relating to a junction neighborhood obtained from a parameter management unit 907 for managing parameters relating to an HMI; and an information provision output apparatus 901 for performing information provision on the basis of an HMI output request transmitted from the HMI output control unit 906.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: December 2, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hisashi Sugawara, Shigeki Morita, Takashi Maeda, Hiroshi Araki, Yukio Goto, Yuji Igarashi
  • Publication number: 20140306641
    Abstract: A motor control apparatus includes a reference model unit configured to generate a model output representing a desired operation of the controlled object and a model input for driving the controlled object to the desired operation, a feedback unit configured to generate a feedback for causing the control output to follow the model output, and an adder configured to add up the model input and the feedback and generate a control input to the controlled object. The reference model unit includes a storing unit configured to retain, as a vector, a present value of the target value and one or a plurality of past values of the target value, a numerical model configured to simulate a characteristic of the controlled object and generate the model output and a state variable on the basis of the model input, a model controller configured to generate the model input, and a controller determining unit configured to determine the model controller.
    Type: Application
    Filed: March 21, 2012
    Publication date: October 16, 2014
    Applicants: Mitsubishi Electric Corporation, Tokyo Institute of Technology
    Inventors: Yuji Igarashi, Hidetoshi Ikeda, Takashi Iwasaki, Takeshi Hatanaka, Masayuki Fujita
  • Publication number: 20140300308
    Abstract: A reference model unit calculates a model position, with which a model of a controlled object follows a position command, and a model torque for the model of the controlled object to operate to coincide with the model position. A gain changing unit changes, during the operation of the controlled object, at least a value of one control gain of first-order and second-order control gains used for calculation of a variable compensation value output to an integral compensator by a variable-compensation calculating unit based on at least one of the model position, a position detection value, and a torque command output to the controlled object by a torque adder, and reflects the value on calculation of the variable compensation value.
    Type: Application
    Filed: September 27, 2012
    Publication date: October 9, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hidetoshi Ikeda, Akio Saito, Yuji Igarashi
  • Patent number: 8786219
    Abstract: A motor control device includes: a feedforward computing section for computing a motion reference value and a feedforward driving force based on a motion command; a deviation compensation computing section for outputting a deviation compensation driving force by a control computation for reducing a control deviation; a driving-force command synthesizing section for outputting a driving-force command based on the feedforward driving force and the deviation compensation driving force; a reaction-force compensation computing section for computing a motion correction value based on a predetermined reaction-force reference value and the deviation compensation driving force; and a control-deviation computing section for computing the control deviation based on a deviation between the motion reference value and a motor motion detection value, and the motion correction value.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: July 22, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hidetoshi Ikeda, Yoshihiro Marushita, Koichiro Ueda, Yuji Igarashi, Kiyoshi Maekawa
  • Publication number: 20140191884
    Abstract: Disclosed is a vehicle-mounted communication device that carries out radio communications with a communication device for pedestrians which is carried by a pedestrian, the vehicle-mounted communication device including: a receiver that receives pedestrian information showing whether the pedestrian belongs to a pedestrian group formed of the pedestrian and a plurality of pedestrians in the vicinity of the pedestrian from the communication device for pedestrians; a controller that judges the pedestrian information received by the receiver and issues a command to present pedestrian attention information when the pedestrian information shows that the pedestrian does not belong to a pedestrian group; and an information outputter that presents the pedestrian attention information according to the command from the controller. Therefore, the vehicle-mounted communication device enables the driver to certainly recognize the existence of a pedestrian not belonging to a pedestrian group.
    Type: Application
    Filed: November 29, 2011
    Publication date: July 10, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takashi Maeda, Yuji Igarashi, Yuji Hamada, Hisashi Sugawara, Takatoshi Tosa
  • Patent number: 8700299
    Abstract: Disclosed is a navigation device including a traveling route estimating unit 1 for estimating a route along which a moving object will travel and which falls within a predetermined region from a current position, a first recommended speed arithmetic unit 10 for computing a recommended speed in each of road sections on the route estimated by the traveling route estimating unit 1 on the basis of road state information showing a road state, and a second recommended speed arithmetic unit 20 for computing a recommended speed in a road section between the road sections for each of which the recommended speed is computed by the first recommended speed arithmetic unit 10 according to a predetermined speed variation function.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: April 15, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shigeki Morita, Takashi Maeda, Hisashi Sugawara, Takatoshi Tosa, Yuji Igarashi
  • Publication number: 20130245945
    Abstract: Disclosed is a navigation device including a traveling route estimating unit 1 for estimating a route along which a moving object will travel and which falls within a predetermined region from a current position, a first recommended speed arithmetic unit 10 for computing a recommended speed in each of road sections on the route estimated by the traveling route estimating unit 1 on the basis of road state information showing a road state, and a second recommended speed arithmetic unit 20 for computing a recommended speed in a road section between the road sections for each of which the recommended speed is computed by the first recommended speed arithmetic unit 10 according to a predetermined speed variation function.
    Type: Application
    Filed: February 24, 2011
    Publication date: September 19, 2013
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shigeki Morita, Takashi Maeda, Hisashi Sugawara, Takatoshi Tosa, Yuji Igarashi
  • Publication number: 20130234642
    Abstract: A motor control device that controls motion of a control target including a motor and a vibratable element includes a generating unit configured to generate, according to state information representing a state of the control target related to a vibration characteristic of the control target, a first parameter representing the vibration characteristic of the control target, a first calculating unit configured to calculate a second parameter corresponding to a temporal change amount of the first parameter generated by the generating unit, a second calculating unit configured to calculate, using a motion target value, the first parameter, and the second parameter, model torque such that the control target does not excite vibration, and a developing unit configured to develop, according to the model torque calculated by the second calculating unit, a torque command such that the motion of the control target follows the motion target value.
    Type: Application
    Filed: December 16, 2011
    Publication date: September 12, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yuji Igarashi, Hidetoshi Ikeda, Hiroto Takei
  • Publication number: 20130214718
    Abstract: A motor control device includes a feedback filter that has filter characteristics that a frequency response gain is substantially one at frequencies equal to or lower than a filter cutoff frequency, a frequency response gain decreases with increase in frequency in a range from the filter cutoff frequency ?fL to a filter upper limit frequency ?fH higher than the filter cutoff frequency ?fL, and a frequency response gain is substantially constant at frequencies equal to or higher than the filter upper limit frequency ?fH, and performs computing to apply the filter characteristics to a feedback transfer function, wherein a control-constant set unit sets a speed gain Kv and at least one of the filter cutoff frequency ?fL and the filter upper limit frequency ?fH to reduce a ratio of the filter upper limit frequency ?fH to the filter cutoff frequency ?fL with increase in the speed gain Kv.
    Type: Application
    Filed: October 7, 2011
    Publication date: August 22, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hidetoshi Ikeda, Hiroyuki Sekiguchi, Yuji Igarashi, Shuya Sano, Takashi Isoda
  • Publication number: 20130038265
    Abstract: To stably control a driving object to approach and contact a pressure object at a low impact, to suppress a vibration generated when the driving object presses the pressure object, and to enable a motor controller to operate based on a simple command, a regression torque controller of the motor controller limits a torque-control velocity command to up to a velocity limit value vlim defined based on a contact velocity between a driving object and a pressure object and outputs the torque-control velocity command, and a velocity controller of the motor controller calculates a torque command so that a motor velocity can follow the torque-control velocity command output from the regression torque controller.
    Type: Application
    Filed: February 7, 2011
    Publication date: February 14, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yuji Igarashi, Hidetoshi Ikeda, Kiyoshi Maekawa, Kei Terada
  • Publication number: 20130035914
    Abstract: A servo controller includes: a reference model unit which inputs a reference to generate a model output and a model input; a feedback control unit which generates a feedback input so that a control output of a plant follows the model output; and an adder which adds the model input and the feedback input, in which the reference model unit includes: a mathematical model which simulates characteristics of the plant, and generates the model output and a state variable from the model input; a model input memory which outputs a past model input; a model controller which inputs the reference, the state variable, and the past model input to generate the model input; and a model controller determining unit which determines the model controller based on the reference, the state variable, and the past model input.
    Type: Application
    Filed: April 25, 2011
    Publication date: February 7, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yuji Igarashi, Hidetoshi Ikeda, Kiyoshi Maekawa, Takashi Iwasaki
  • Publication number: 20120306426
    Abstract: A motor control device includes: a feedforward computing section for computing a motion reference value and a feedforward driving force based on a motion command; a deviation compensation computing section for outputting a deviation compensation driving force by a control computation for reducing a control deviation; a driving-force command synthesizing section for outputting a driving-force command based on the feedforward driving force and the deviation compensation driving force; a reaction-force compensation computing section for computing a motion correction value based on a predetermined reaction-force reference value and the deviation compensation driving force; and a control-deviation computing section for computing the control deviation based on a deviation between the motion reference value and a motor motion detection value, and the motion correction value.
    Type: Application
    Filed: January 25, 2011
    Publication date: December 6, 2012
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hidetoshi Ikeda, Yoshihiro Marushita, Koichiro Ueda, Yuji Igarashi, Kiyoshi Maekawa
  • Publication number: 20120209510
    Abstract: An in-vehicle information processing device capable of efficiently processing information by extracting an event that exists outside of a travel route but can possibly reach the travel route. The in-vehicle information processing device includes a map database, a traffic information database, a vehicle position determination mechanism, a driving assist information extraction mechanism for extracting driving assist information, and a driving assist information database for storing the driving assist information. An aid information extraction mechanism includes a travel route determination mechanism for determining a vehicle travel route based on a vehicle position. The driving assist information extraction mechanism extracts the driving assist information from map information and traffic information on the travel route.
    Type: Application
    Filed: November 25, 2010
    Publication date: August 16, 2012
    Applicant: Mitsubishi Electric Corporation
    Inventors: Masahiko Ikawa, Yuji Igarashi, Yuko Ota, Takashi Irie
  • Patent number: 8209813
    Abstract: In a vehicle windshield wiper system, a support base includes a connecting rod (9) fixedly attached to a vehicle body and extending across a width of the vehicle body, and a base member (10, 11) depending from an intermediate part of the connecting member. A wiper motor (2) attached to a lower surface of a horizontal wall portion (11) of the base member, and a crank arm (3) is attached to an output shaft of the wiper motor. The base member is formed with an opening (13) to avoid an interference with the crank arm as the crank arm undergoes the rotative movement. The opening in the support base prevents an interference with the movement of the crank arm, and this allows the crank arm and an associated link mechanism (6) to be placed opposite to a vertically intermediate part of the support base, and immediately adjacent to the support base. Therefore, the windshield wiper system can be accommodated in a readily available space (24) under the lower edge of the windshield.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: July 3, 2012
    Assignee: Mitsuba Corporation
    Inventors: Yuji Igarashi, Kazuhiro Sekiguchi, Mikito Kato, Junji Kishimoto
  • Publication number: 20110254699
    Abstract: A vehicle-mounted narrow-band wireless communication apparatus includes: information storing/managing section 905 for storing and managing roadside information from a wireless communication unit and operating condition information from an operating condition detection unit 903; an information provision determination unit 904 for determining whether or not information can be provided on the basis of the roadside information and the operating condition information; an HMI output control unit 906 for controlling HMI output on the basis of a determination result from the information provision determination unit 904 and environment information relating to a junction neighbourhood obtained from a parameter management unit 907 for managing parameters relating to an HMI; and an information provision output apparatus 901 for performing information provision on the basis of an HMI output request transmitted from the HMI output control unit 906.
    Type: Application
    Filed: March 2, 2010
    Publication date: October 20, 2011
    Inventors: Hisashi Sugawara, Shigeki Morita, Takashi Maeda, Hiroshi Araki, Yukio Goto, Yuji Igarashi
  • Publication number: 20090126141
    Abstract: In a vehicle windshield wiper system, a support base includes a connecting rod (9) fixedly attached to a vehicle body and extending across a width of the vehicle body, and a base member (10, 11) depending from an intermediate part of the connecting member. A wiper motor (2) attached to a lower surface of a horizontal wall portion (11) of the base member, and a crank arm (3) is attached to an output shaft of the wiper motor. The base member is formed with an opening (13) to avoid an interference with the crank arm as the crank arm undergoes the rotative movement. The opening in the support base prevents an interference with the movement of the crank arm, and this allows the crank arm and an associated link mechanism (6) to be placed opposite to a vertically intermediate part of the support base, and immediately adjacent to the support base. Therefore, the windshield wiper system can be accommodated in a readily available space (24) under the lower edge of the windshield.
    Type: Application
    Filed: November 13, 2008
    Publication date: May 21, 2009
    Applicant: MITSUBA CORPORATION
    Inventors: YUJI IGARASHI, KAZUHIRO SEKIGUCHI, MIKITO KATO, JUNJI KISHIMOTO
  • Patent number: 6594853
    Abstract: A wiper apparatus for a motor vehicle comprising a sleeve secured to a vehicle body side and a pivot shaft which is supported rotatably in the sleeve. The proximal portion of the pivot shaft relative to the interior side of the vehicle is connected to a drive source. The tip portion of the pivot shaft holds a wiper arm on the exterior side of the vehicle. For the pivot shaft to depress toward the vehicle's interior side with respect to the sleeve, a load exceeding a predetermined value works axially on the pivot shaft from the vehicle's exterior side. A depression preventing member is interposed between the pivot shaft and the sleeve and is deformed when receiving the load that depresses the pivot shaft. A deformation space is secured between the pivot shaft and the sleeve enabling the depression preventing member to deform smoothly in response to the load.
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: July 22, 2003
    Assignee: Mitsuba Corporation
    Inventor: Yuji Igarashi
  • Patent number: 6473932
    Abstract: The invention provides greater rigidity in a wiper arm unitarily formed of an arm shank section for connecting to an arm head and an arm piece section for connecting to a wiper blade. An intermediate section is formed between the arm shank section and the arm piece section of the wiper arm, having a bottom surface portion and folded-piece portions which approach the bottom surface portion and oppose each other. While the bottom surface portion is laterally curved, the thickness of the intermediate section facing a window surface is over twice the thickness of a plate material by forming a gap between the bottom surface portion and the folded-piece portions.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: November 5, 2002
    Assignee: Mitsuba Corporation
    Inventor: Yuji Igarashi