Patents by Inventor Naoki Imamura
Naoki Imamura 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: 11947364Abstract: In a conventional vessel anti-rolling apparatus, because a large memory capacity and a high-speed high-function computing processing unit are required, the cost of the vessel anti-rolling apparatus is caused to rise. A vessel anti-rolling control apparatus and an anti-rolling control method according to the present disclosure includes an azimuth controller that outputs a first steering-angle command value for making the vessel turn to an azimuth to which the vessel should travel, based on an azimuth command signal and a yaw-angle signal, an anti-rolling controller that outputs a second steering-angle command value for reducing rolling of the vessel, based on a rolling-angle signal, a rolling-angular-velocity signal, and a vessel-speed signal, and a steering-angle controller that controls a steering angle, based on the first steering-angle command value and the second steering-angle command value.Type: GrantFiled: December 21, 2021Date of Patent: April 2, 2024Assignee: Mitsubishi Electric CorporationInventors: Naoki Imamura, Ryo Sakaguchi
-
Publication number: 20230406473Abstract: The vessel azimuth control apparatus has an azimuth control unit that outputs a steering-angle command signal for making a vessel turn to an azimuth to which the vessel should travel, based on an azimuth command signal generated by an azimuth command generation unit, a yaw-angle signal, and a yaw-angular-velocity signal, a steering-angle control unit that controls a rudder based on the steering-angle command signal, and a control gain adjustment unit that has a calculation feasibility determination unit for determining feasibility of calculation of frequency responses, based on the yaw-angle signal and the yaw-angular-velocity signal, and that calculates respective frequency responses of the yaw-angle signal and the yaw-angular-velocity signal for the steering-angle signal, when the calculation feasibility determination unit determines that calculation of frequency response are feasible, and then adjusts a control gain of the azimuth control unit.Type: ApplicationFiled: April 20, 2023Publication date: December 21, 2023Applicant: Mitsubishi Electric CorporationInventors: Toru IKEGAME, Naoki Imamura, Ryo Sakaguchi, Takuya Ishioka
-
Publication number: 20230223881Abstract: A motor control device includes: a first duty ratio computation unit to compute a first duty ratio to be used for control of a motor body portion on the basis of a target rotational position of a rotor and a rotational position of the rotor; a second duty ratio computation unit to compute a second duty ratio corresponding to an upper limit of the absolute value of the first duty ratio on the basis of a linear function including a variable corresponding to the number of rotations of the rotor; and a control signal output unit to output a control signal corresponding to the first duty ratio when the absolute value of the first duty ratio is smaller than the absolute value of the second duty ratio, and to output a control signal corresponding to the second duty ratio when it is not.Type: ApplicationFiled: August 6, 2020Publication date: July 13, 2023Applicant: Mitsubishi Electric CorporationInventors: Ryo AWAYA, Sachiko KAWASAKI, Tomokuni KATO, Taihei KAWASAKA, Naoki IMAMURA, Satoshi KAWAMURA
-
Publication number: 20220315193Abstract: The objective is to obtain an azimuth control apparatus and an azimuth control method that require no excessive memory capacity and calculation time for information processing and can cope with a disturbance by adaptively adjusting a control gain while calculating changing vessel parameters online. The vessel azimuth control apparatus has an azimuth control unit that outputs a steering-angle command signal for making a vessel turn to an azimuth to which the vessel should travel, based on an azimuth command signal generated by an azimuth command generation unit, a yaw-angle signal, and a yaw-angular-velocity signal, a steering-angle control unit that controls a rudder based on the steering-angle command signal, and a control gain adjustment unit that calculates respective frequency responses of the yaw-angle signal and the yaw-angular-velocity signal to a steering-angle signal outputted by a steering-angle detection unit and then adjusts a control gain of the azimuth control unit.Type: ApplicationFiled: February 17, 2022Publication date: October 6, 2022Applicant: Mitsubishi Electric CorporationInventors: Toru IKEGAME, Naoki IMAMURA, Takuya ISHIOKA, Ryo SAKAGUCHI
-
Patent number: 11463028Abstract: A sensor (110) detects the angle of the output shaft (101a) of a synchronous motor (101). A multiple rotation processing unit (301) converts the angle of one rotation or more that is detected by the sensor (110) into a multiple rotation angle. A phase difference FB unit (305) performs feedback control in such a way that the phase difference between the electrical angle and the mechanical angle of the synchronous motor (101) is a target phase difference (306). A position FB unit (302) performs feedback control in such a way that the multiple rotation angle after conversion by the multiple rotation processing unit (301) is a target position (303).Type: GrantFiled: August 31, 2017Date of Patent: October 4, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yuya Nishimori, Satoshi Kawamura, Naoki Imamura
-
Publication number: 20220269289Abstract: In a conventional vessel anti-rolling apparatus, because a large memory capacity and a high-speed high-function computing processing unit are required, the cost of the vessel anti-rolling apparatus is caused to rise. A vessel anti-rolling control apparatus and an anti-rolling control method according to the present disclosure includes an azimuth controller that outputs a first steering-angle command value for making the vessel turn to an azimuth to which the vessel should travel, based on an azimuth command signal and a yaw-angle signal, an anti-rolling controller that outputs a second steering-angle command value for reducing rolling of the vessel, based on a rolling-angle signal, a rolling-angular-velocity signal, and a vessel-speed signal, and a steering-angle controller that controls a steering angle, based on the first steering-angle command value and the second steering-angle command value.Type: ApplicationFiled: December 21, 2021Publication date: August 25, 2022Applicant: Mitsubishi Electric CorporationInventors: Naoki IMAMURA, Ryo Sakaguchi
-
Patent number: 11378984Abstract: A vessel-azimuth control apparatus is configured in such a way that an azimuth controller generates and outputs an angular velocity command, based on an azimuth command from an azimuth command generator and an actual azimuth, in such a way that an angular velocity controller generates and outputs a steering angle command, based on the angular velocity command, a vessel speed, and an actual angular velocity, and in such a way that a vibration suppression controller outputs a final steering angle command, based on the steering angle command.Type: GrantFiled: June 30, 2020Date of Patent: July 5, 2022Assignee: Mitsubishi Electric CornorationInventors: Naoki Imamura, Ryo Sakaguchi
-
Patent number: 11260996Abstract: A lunar orbiting satellite system executes orbit planning of assigning a function (positioning, communication, and flashing) to an artificial satellite (AS) depending on a relative position of the AS to the moon at a time when the moon and the AS are observed from an input point on the earth, and correcting the relative position, which changes in accordance with the moon revolution period. The system includes: a satellite orbit planner which assigns a function to each ASs forming an AS group flying around the moon depending on a relative position of each ASs to the moon at a time when the moon and ASs are observed from an input point on the earth, and set a target orbit according to the function; and a satellite controller which causes the each ASs to execute control based on the function to implement switching of the function.Type: GrantFiled: May 30, 2017Date of Patent: March 1, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Naoki Imamura, Shoji Yoshikawa, Kenro Mitsuda, Kazushi Sekine, Kana Tsuneishi, Mitsuhiro Yamazumi
-
Patent number: 11169524Abstract: An object is to obtain a heading control device and a heading control method for ship in which a heading control system is configured on the basis of ship motion information, without promoting oscillation excited by disturbance factors to the ship, such as tidal current or wind. The heading control device for ship, which causes a ship provided with an outboard motor to sail at a desired heading, includes: a heading generator which outputs a heading command; and a controller which outputs a rudder angle command on the basis of the heading command from the heading generator, sensor group information from a sensor group, and ship motion characteristic information from a ship motion characteristic information storage unit.Type: GrantFiled: April 12, 2019Date of Patent: November 9, 2021Assignee: Mitsubishi Electric CorporationInventors: Naoki Imamura, Ryo Sakaguchi, Daisuke Suzuki
-
Patent number: 11098687Abstract: There is provided an engine starting device, including: a motor generator coupled to a crankshaft of an engine; and a starter including a pinion provided in a detachable manner from a ring gear provided on the crankshaft, and configured to mesh with the ring gear when the engine is started, wherein the engine is cranked through simultaneous cranking by both of the motor generator and the starter when a condition set in advance is satisfied, and wherein, in the simultaneous cranking, the starter starts rotating after the motor generator starts rotating.Type: GrantFiled: May 8, 2018Date of Patent: August 24, 2021Assignee: Mitsubishi Electric CorporationInventors: Naohito Kaneda, Naoki Imamura, Koichiro Kamei, Kazuhiro Odahara
-
Publication number: 20210255640Abstract: A vessel-azimuth control apparatus is configured in such a way that an azimuth controller generates and outputs an angular velocity command, based on an azimuth command from an azimuth command generator and an actual azimuth, in such a way that an angular velocity controller generates and outputs a steering angle command, based on the angular velocity command, a vessel speed, and an actual angular velocity, and in such a way that a vibration suppression controller outputs a final steering angle command, based on the steering angle command.Type: ApplicationFiled: June 30, 2020Publication date: August 19, 2021Applicant: Mitsubishi Electric CorporationInventors: Naoki IMAMURA, Ryo SAKAGUCHI
-
Publication number: 20210078733Abstract: A lunar orbiting satellite system executes orbit planning of assigning a function (positioning, communication, and flashing) to an artificial satellite (AS) depending on a relative position of the AS to the moon at a time when the moon and the AS are observed from an input point on the earth, and correcting the relative position, which changes in accordance with the moon revolution period. The system includes: a satellite orbit planner which assigns a function to each ASs forming an AS group flying around the moon depending on a relative position of each ASs to the moon at a time when the moon and ASs are observed from an input point on the earth, and set a target orbit according to the function; and a satellite controller which causes the each ASs to execute control based on the function to implement switching of the function.Type: ApplicationFiled: May 30, 2017Publication date: March 18, 2021Applicant: Mitsubishi Electric CorporationInventors: Naoki IMAMURA, Shoji YOSHIKAWA, Kenro MITSUDA, Kazushi SEKINE, Kana TSUNEISHI, Mitsuhiro YAMAZUMI
-
Publication number: 20200200137Abstract: There is provided an engine starting device, including: a motor generator coupled to a crankshaft of an engine; and a starter including a pinion provided in a detachable manner from a ring gear provided on the crankshaft, and configured to mesh with the ring gear when the engine is started, wherein the engine is cranked through simultaneous cranking by both of the motor generator and the starter when a condition set in advance is satisfied, and wherein, in the simultaneous cranking, the starter starts rotating after the motor generator starts rotating.Type: ApplicationFiled: May 8, 2018Publication date: June 25, 2020Applicant: Mitsubishi Electric CorporationInventors: Naohito KANEDA, Naoki IMAMURA, Koichiro KAMEI, Kazuhiro ODAHARA
-
Patent number: 10663539Abstract: According to one embodiment, a magnetic resonance imaging apparatus installed in a shield room comprises a gantry, a table, and at least one unit. The gantry includes a static magnetic field magnet, a gradient magnetic field coil, and an RF coil. The subject is to be placed on the table. The at least one unit relates to control of the magnetic resonance imaging apparatus and is configured to include at least one opening on a upper surface on for maintenance and inspection.Type: GrantFiled: June 23, 2017Date of Patent: May 26, 2020Assignee: Canon Medical Systems CorporationInventors: Kazuyuki Soejima, Naoki Imamura, Naho Imamura
-
Publication number: 20200161995Abstract: A sensor (110) detects the angle of the output shaft (101a) of a synchronous motor (101). A multiple rotation processing unit (301) converts the angle of one rotation or more that is detected by the sensor (110) into a multiple rotation angle. A phase difference FB unit (305) performs feedback control in such a way that the phase difference between the electrical angle and the mechanical angle of the synchronous motor (101) is a target phase difference (306). A position FB unit (302) performs feedback control in such a way that the multiple rotation angle after conversion by the multiple rotation processing unit (301) is a target position (303).Type: ApplicationFiled: August 31, 2017Publication date: May 21, 2020Applicant: Mitsubishi Electric CorporationInventors: Yuya NISHIMORI, Satoshi KAWAMURA, Naoki IMAMURA
-
Patent number: 10507899Abstract: To provide a motion control device for a ship, which does not require adjustment of weights of an performance function, and is less liable to fail in control calculation by building optimization calculation only into a part of classical feedback control, the motion control device, which is configured to cause a ship, on which a plurality of outboard engines are installed, to cruise along a desired trajectory, includes: a trajectory generator configured to output a trajectory command; a controller configured to output a control force command based on the trajectory command and a sensor information group output from a sensor group provided for the ship; and a control force distributor configured to carry out, based on the control force command, optimization calculation for operation amounts required for the plurality of outboard engines in accordance with a constraint condition set in advance so as to output the operation amounts.Type: GrantFiled: January 22, 2018Date of Patent: December 17, 2019Assignee: Mitsubishi Electric CorporationInventors: Naoki Imamura, Ryo Sakaguchi, Norihiko Mouri
-
Publication number: 20190324462Abstract: An object is to obtain a heading control device and a heading control method for ship in which a heading control system is configured on the basis of ship motion information, without promoting oscillation excited by disturbance factors to the ship, such as tidal current or wind. The heading control device for ship, which causes a ship provided with an outboard motor to sail at a desired heading, includes: a heading generator which outputs a heading command; and a controller which outputs a rudder angle command on the basis of the heading command from the heading generator, sensor group information from a sensor group, and ship motion characteristic information from a ship motion characteristic information storage unit.Type: ApplicationFiled: April 12, 2019Publication date: October 24, 2019Applicant: Mitsubishi Electric CorporationInventors: Naoki IMAMURA, Ryo SAKAGUCHI, Daisuke SUZUKI
-
Publication number: 20180290719Abstract: To provide a motion control device for a ship, which does not require adjustment of weights of an performance function, and is less liable to fail in control calculation by building optimization calculation only into a part of classical feedback control, the motion control device, which is configured to cause a ship, on which a plurality of outboard engines are installed, to cruise along a desired trajectory, includes: a trajectory generator configured to output a trajectory command; a controller configured to output a control force command based on the trajectory command and a sensor information group output from a sensor group provided for the ship; and a control force distributor configured to carry out, based on the control force command, optimization calculation for operation amounts required for the plurality of outboard engines in accordance with a constraint condition set in advance so as to output the operation amounts.Type: ApplicationFiled: January 22, 2018Publication date: October 11, 2018Applicant: Mitsubishi Electric CorporationInventors: Naoki IMAMURA, Ryo SAKAGUCHI, Norihiko MOURI
-
Patent number: 10048337Abstract: Image diagnosis apparatus (20) generates image data of an object by using external electric power, and includes a charge/discharge element and a charge/discharge control circuit. The charge/discharge element is charged with the external electric power and supplies part of the consumed power of the image diagnosis apparatus by discharging. The charge/discharge control circuit controls charge and discharge of the charge/discharge element in such a manner that the charge/discharge element discharges in a period during which the consumed power is larger than a predetermined power amount and the charge/discharge element is charged in a period during which the consumed power is smaller than the predetermined power amount.Type: GrantFiled: October 31, 2013Date of Patent: August 14, 2018Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATIONInventors: Motohisa Yokoi, Motohiro Miura, Sho Kawajiri, Kazuyuki Soejima, Haruki Nakamura, Naoki Imamura
-
Patent number: 9989602Abstract: An MRI apparatus includes a data acquisition system, a charge/discharge element and a power control unit. The data acquisition system acquires nuclear magnetic resonance signals from an imaging region by performing a scan. The charge/discharge element is a part of an electric power system of the MRI apparatus, and is charged with external electric power. The power control unit controls the electric power system in such a manner that at least one unit excluding the data acquisition system is supplied with electric power from the charge/discharge element.Type: GrantFiled: October 31, 2013Date of Patent: June 5, 2018Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATIONInventors: Naoki Imamura, Motohisa Yokoi, Kazuyuki Soejima, Motohiro Miura, Sho Kawajiri, Haruki Nakamura