Patents by Inventor Toru Sakaguchi
Toru Sakaguchi 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).
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Publication number: 20190031229Abstract: A control unit of an electric power steering apparatus that configures a control system on the basis of a physical model of a rack (steering rack) mechanism, configures a model following control where an output of a controlled object follows an output of a reference model, makes a driver feel an appropriate reaction force, and suppresses uncomfortable feeling to the driver by pulling-tendency, is provided. The control unit of the electric power steering apparatus that assists and controls a steering system by driving a motor based on a current command value, includes a configuration of a model following control setting a viscoelastic model for a rack displacement as a reference model, performs a feedback control which inputs a shaft force corresponding to a road surface reaction force, and generates a virtual reaction force, by the configuration of the model following control.Type: ApplicationFiled: March 17, 2017Publication date: January 31, 2019Applicant: NSK LTD.Inventors: Toru SAKAGUCHI, Toshikazu ONOE
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Patent number: 10173719Abstract: An electric power steering apparatus that calculates a first current command value based on at least a steering torque and performs an assist-control of a steering system by driving a motor based on the first current command value, including: a configuration of a model following control including a viscoelastic model as a reference model within a predetermined angle at front of a rack end, wherein an offset is given to input or output of the viscoelastic model for preventing an overheat, resulting in suppressing a rack end hitting.Type: GrantFiled: December 24, 2015Date of Patent: January 8, 2019Assignee: NSK LTD.Inventors: Toru Sakaguchi, Toshikazu Onoe
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Patent number: 10118636Abstract: A high-performance electric power steering apparatus that includes a control system based on a physical model, includes a model following control that an output (a distance to a rack end) of a controlled object follows-up to a reference model, eliminates or reduces the occurrences of a noisy sound and a shock force at an end hitting without giving any uncomfortable steering feeling to a driver, and reduces the end hitting. The electric power steering apparatus calculates a current command value based on at least a steering torque and performs an assist-control of a steering system by driving a motor based on the current command value, including: a configuration of a model following control including a viscoelastic model as a reference model within a predetermined angle at front of a rack end so as to suppress a rack end hitting.Type: GrantFiled: December 24, 2015Date of Patent: November 6, 2018Assignee: NSK LTD.Inventors: Toru Sakaguchi, Shoya Maruyama
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Patent number: 10059368Abstract: An electric power steering apparatus includes a control section that includes a feed-back control section which sets a viscoelastic model as a reference model within a predetermined angle at front of a rack end. The feed-back control section includes a feed-back element to calculate a target rack displacement based on an input-side rack axial force and a control element to output an output-side rack axial force based on a position deviation between the target rack displacement and a rack displacement.Type: GrantFiled: December 24, 2015Date of Patent: August 28, 2018Assignee: NSK LTD.Inventors: Toru Sakaguchi, Shoya Maruyama
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Patent number: 10023226Abstract: [Problem] An object of the present invention is to provide an electric power steering apparatus that constitutes a control system based on a physical model, constitutes a model following control that an output (a distance to a rack end) of a controlled object follows-up to a reference model, suppresses the occurrences of a noisy sound and a shock force at an end hitting without giving any uncomfortable steering feeling to a driver, and is capable of smoothly steering.Type: GrantFiled: December 24, 2015Date of Patent: July 17, 2018Assignee: NSK LTD.Inventors: Toru Sakaguchi, Toshikazu Onoe, Satoshi Shimokawabe
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Publication number: 20180032017Abstract: A printer controller determines whether a cartridge refilled with a recording material is mounted on an image forming apparatus. If it is determined that the cartridge refilled with the recording material is mounted on the image forming apparatus, control for shifting a printer engine to a predetermined state is performed, raw data is acquired from the printer engine that has been shifted to the predetermined state, and a user is notified of the degree of wear of the cartridge based on the acquired raw data. On the other hand, if the printer controller determines that the cartridge refilled with the recording material is not mounted on the image forming apparatus, the printer controller acquires a predicted value from the printer engine, and notifies the user of the degree of wear of the cartridge based on the predicted value.Type: ApplicationFiled: July 25, 2017Publication date: February 1, 2018Inventor: Toru Sakaguchi
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Publication number: 20170334481Abstract: [Problem] An object of the present invention is to provide an electric power steering apparatus that constitutes a control system based on a physical model, constitutes a model following control that an output (a distance to a rack end) of a controlled object follows-up to a reference model, suppresses the occurrences of a noisy sound and a shock force at an end hitting without giving any uncomfortable steering feeling to a driver, and is capable of smoothly steering.Type: ApplicationFiled: December 24, 2015Publication date: November 23, 2017Applicant: NSK Ltd.Inventors: Toru SAKAGUCHI, Toshikazu ONOE, Satoshi SHIMOKAWABE
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Publication number: 20170327145Abstract: An electric power steering apparatus that calculates a first current command value based on at least a steering torque and performs an assist-control of a steering system by driving a motor based on the first current command value, including: a configuration of a model following control including a viscoelastic model as a reference model within a predetermined angle at front of a rack end, wherein an offset is given to input or output of the viscoelastic model for preventing an overheat, resulting in suppressing a rack end hitting.Type: ApplicationFiled: December 24, 2015Publication date: November 16, 2017Applicant: NSK Ltd.Inventors: Toru SAKAGUCHI, Toshikazu ONOE
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Publication number: 20170327144Abstract: [Problem] An object of the present invention is to provide a high-performance electric power steering apparatus that constitutes a control system based on a physical model, constitutes a model following control that an output (a distance to a rack end) of a controlled object follows-up to a reference model, eliminates or reduces the occurrences of a noisy sound and a shock force at an end hitting without giving any uncomfortable steering feeling to a driver, and reduces the end hitting. [Means for solving the problem] The present invention is the electric power steering apparatus that calculates a current command value based on at least a steering torque and performs an assist-control of a steering system by driving a motor based on the current command value, comprising: a configuration of a model following control including a viscoelastic model as a reference model within a predetermined angle at front of a rack end so as to suppress a rack end hitting.Type: ApplicationFiled: December 24, 2015Publication date: November 16, 2017Applicant: NSK LTD.Inventors: Toru SAKAGUCHI, Shoya MARUYAMA
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Patent number: 9796412Abstract: An electric power steering apparatus with a good steering feeling that includes a function for getting out from restraint of a lateral flow or a one-sided flow, and enables acquisition of a better effect that a driver's load is reduced in the lateral flow or the one-sided flow.Type: GrantFiled: June 4, 2015Date of Patent: October 24, 2017Assignee: NSK LTD.Inventor: Toru Sakaguchi
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Publication number: 20170297613Abstract: An electric power steering apparatus includes a control section that includes a feed-back control section which sets a viscoelastic model as a reference model within a predetermined angle at front of a rack end. The feed-back control section includes a feed-back element to calculate a target rack displacement based on an input-side rack axial force and a control element to output an output-side rack axial force based on a position deviation between the target rack displacement and a rack displacement.Type: ApplicationFiled: December 24, 2015Publication date: October 19, 2017Applicant: NSK LTD.Inventors: Toru SAKAGUCHI, Shoya MARUYAMA
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Publication number: 20170163835Abstract: An information processing apparatus that enables a user to install a desired module with ease. A plurality of modules are installed into a PC as an information processing apparatus for performing print processing in an MFP as an image processing apparatus. A usage form of the PC is set. Required ones of the plurality of modules are displayed based on the set usage form, and are installed into the PC.Type: ApplicationFiled: November 30, 2016Publication date: June 8, 2017Inventors: Takashi Okazawa, Chie Ito, Hiroshi Oya, Naoki Morita, Toru Sakaguchi
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Publication number: 20170160997Abstract: A control method for an information processing apparatus which prevent a page of a print job including a print setting which cannot be addressed by an image forming apparatus from being transmitted to the image forming apparatus. A print job generated in a printer driver to cause an image forming apparatus to perform printing is received from the printer driver. A print setting included in the received print job is analyzed based on conflict information for managing a combination that includes a combination of contents of print setting items that causes a conflict and is unmanageable by the printer driver. When the print job is transmitted, at least a page that causes a conflict with respect to the image forming apparatus, in the print job, is not transmitted based on a result of the analysis.Type: ApplicationFiled: November 29, 2016Publication date: June 8, 2017Inventors: Naoki Morita, Hiroshi Oya, Takashi Okazawa, Toru Sakaguchi, Chie Ito
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Publication number: 20170106898Abstract: [Problem] An object of the present invention is to provide a safe electric power steering apparatus with a good steering feeling that includes a function for getting out from restraint of a lateral flow or a one-sided flow, and enables acquisition of a better effect that a driver's load is reduced in the lateral flow or the one-sided flow.Type: ApplicationFiled: June 4, 2015Publication date: April 20, 2017Applicant: NSK Ltd.Inventors: Toru SAKAGUCHI, Shoya MARUYAMA
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Publication number: 20170096163Abstract: An electric power steering apparatus with a good steering feeling that includes a function for getting out from restraint of a lateral flow or a one-sided flow, and enables acquisition of a better effect that a driver's load is reduced in the lateral flow or the one-sided flow.Type: ApplicationFiled: June 4, 2015Publication date: April 6, 2017Applicant: NSK Ltd.Inventor: Toru SAKAGUCHI
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Patent number: 9604666Abstract: An electric power steering apparatus that protects Zener diodes without impairing steering performances by time-integrating a loss power of the Zener diodes for protecting FETs and gradually limiting a duty ratio with an increase in an integrating loss. The apparatus includes a loss power calculating section that calculates a loss power when a difference between an ignition voltage and an inverter applying voltage is equal to or more than a predetermined voltage; an integrating loss calculating section to calculate an integrating loss of the loss power; a permissible loss calculating section to calculate a permissible loss based on a temperature; a minimum value selecting section to select a minimum value of a loss difference of the permissible loss and the integrating loss; and a limit value calculating section to calculate a limit value of the PWM-signal based on the minimum value of the loss difference and the permissible loss.Type: GrantFiled: March 18, 2013Date of Patent: March 28, 2017Assignee: NSK LTD.Inventors: Sachio Nakayama, Toru Sakaguchi, Yuzuru Hoshi, Shinichi Tanaka, Masanori Shingou
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Patent number: 9602684Abstract: An image forming apparatus includes an NFC control unit that performs proximity wireless communication with an information processing apparatus, a network control unit that performs communication with the information processing apparatus through a network, and an RUI control unit that accepts remote operation from the information processing apparatus. When a unique ID of an NFC tag of the information processing apparatus acquired by the NFC control unit, and an IP address of the information processing apparatus acquired by the network control unit identify the same information processing apparatus, the RUI control unit performs control so as to enable remote operation by the external device.Type: GrantFiled: August 25, 2015Date of Patent: March 21, 2017Assignee: Canon Kabushiki KaishaInventor: Toru Sakaguchi
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Publication number: 20170060488Abstract: An information processing apparatus is equipped with an OS, and generates a print job from print data accepted from an application by the OS, and comprises a device service that connects to a print apparatus via a port of the information processing apparatus, accepts the print job from the OS and transmits the print job to the print apparatus, and accepts a control command of the print apparatus from the OS and transmits the control command to the print apparatus. The information processing apparatus causes a status of the print apparatus to be displayed based on the response upon accepting a response from the print apparatus in relation to the control command from the device service.Type: ApplicationFiled: August 4, 2016Publication date: March 2, 2017Inventors: Hiroshi Oya, Naoki Morita, Takashi Okazawa, Toru Sakaguchi, Chie Ito
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Publication number: 20160065759Abstract: An image forming apparatus includes an NFC control unit that performs proximity wireless communication with an information processing apparatus, a network control unit that performs communication with the information processing apparatus through a network, and an RUI control unit that accepts remote operation from the information processing apparatus. When a unique ID of an NFC tag of the information processing apparatus acquired by the NFC control unit, and an IP address of the information processing apparatus acquired by the network control unit identify the same information processing apparatus, the RUI control unit performs control so as to enable remote operation by the external device.Type: ApplicationFiled: August 25, 2015Publication date: March 3, 2016Inventor: Toru Sakaguchi
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Publication number: 20160052541Abstract: An electric power steering apparatus that protects Zener diodes without impairing steering performances by time-integrating a loss power of the Zener diodes for protecting FETs and gradually limiting a duty ratio with an increase in an integrating loss. The apparatus includes a loss power calculating section that calculates a loss power when a difference between an ignition voltage and an inverter applying voltage is equal to or more than a predetermined voltage; an integrating loss calculating section to calculate an integrating loss of the loss power; a permissible loss calculating section to calculate a permissible loss based on a temperature; a minimum value selecting section to select a minimum value of a loss difference of the permissible loss and the integrating loss; and a limit value calculating section to calculate a limit value of the PWM-signal based on the minimum value of the loss difference and the permissible loss.Type: ApplicationFiled: March 18, 2013Publication date: February 25, 2016Applicant: NSK LTD.Inventors: Sachio NAKAYAMA, Toru SAKAGUCHI, Yuzuru HOSHI, Shinichi TANAKA, Masanori SHINGOU