Alpine Electronics, Inc.

The University of Tokyo

Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Mitsubishi Heavy Industries Limited

Nsk Corporation

Bridgestone Corporation

Dmg Mori Seiki Co., Ltd.

Nippondenso Co., Ltd.

Toyo Seikan Kaisha, Ltd.

Mitsubishi Electric Corporation

Nikon Corporation

Nidec Corporation

Dmg Mori Company Limited

Toyo Electric Mfg. Co., Ltd.

Hiroshi Fujimoto

Takashi Ichikawa

Hideki Endo

Osamu Shimizu

Yuichi Tanaka

Daisuke Gunji

Hironobu Shinohara

Hiroshi Shirasawa

Shinji Ishii

Yasutake Akizuki

Toshiki Fukui

Shinji Kiuchi

Kengo Matsumoto

Hiroshi Maeda

Yasumichi Wakao

Yoshiaki Nakayama

Keizo Akutagawa

Isao Kuwayama

Koji Yamamoto

Yuki Terada

Taro Takahashi

Hiroyuki Ban

Hiroshi Imai

Mitsuhiro Saitou

Takahiro Kanno

Makio Iida

Yoshiki Koyama

Teruaki Ishibashi

Takehiro Imura

Shinya Hirota

Masahiro Kimura

Hiroshi Kawaguchi

Koichi Sakata

Gaku Yamamoto

Yukio Tsuzuki

Katsuhiro Imazu

Eisuke Takahashi

Nobuhisa Yamaguchi

Akira Kobayashi

Shoji Mizuno

Masami Yamaoka

Toshio Sakakibara

Masaya Takahashi

Nobumasa Ueda

Takayuki Horie

Tomomi Kobayashi

Kazuaki Saiki

Tomonari Mori

Kenichi Okamura

Yasuhiro Kitamura

Masanori Watahiki

Toru Sasatani

Hayato Sumiya

Sakutaro Hoshi

Linfeng Lan

Masamichi Abe

Akihito Fukui

Kenji Kohno

Masahiro Tsuchida

Tatsuo Takazawa

Toshihide Nakama

Nobumesa Ueda

Norihiko Saiki

Susumu Ueda

Ryohei Kitayoshi

Katsuhiro Hata

Motoki Sato

Toshiaki Matsumura

Kenji Inukai

Kazuhide Tsuchiya

Hongzhong Zhu

Tetsuya Kageyama

Hiroyuki Washio

Atsushi Umaki

Ippei Shiode

Hiroshi Takechi

Satoshi Fukagawa

Akiyuki Hasegawa

Ryousuke Koishi

A wireless power reception systemincludes: a power reception deviceincluding a power reception coilthat receives power supplied wirelessly from a power transmission coilof a power transmission deviceinstalled in a road surface, at least a portion of the power reception coilbeing housed in a wheelof a moving body; and a driving devicewhich is installed in the wheeland which drives the wheelwith power received by the power reception device, wherein the power reception deviceis provided with a converterand an inverter, at least a portion of the converterand at least a portion of the inverterare housed in the wheel, the converteris positioned vertically above the power reception coil, and the inverteris positioned vertically above the converter

Wireless power reception system, moving body, and wheel

A wireless power reception systemincludes: a power reception deviceincluding a power reception coilthat receives power supplied wirelessly from a power transmission coilof a power transmission deviceinstalled in a road surface, at least a portion of the power reception coilbeing housed in a wheelof a moving body; and an onboard devicewhich is installed in the moving bodyand which is electrically connected to the power reception device, wherein the power reception devicecan transmit received power to the onboard device, and the power reception coilincludes a stacked plurality of spiral coil layersand

A control system includes circuitry configured to: generate, based on a command profile representing a temporal change of a command for driving a controlled object and a response profile representing a temporal change of a state of the controlled object responding to the command profile, a first model representing at least a part of a relation between the command and the state of the controlled object; generate, based on the command profile, the response profile, and the first model, a second model representing another part of the relation that is not represented by the first model; generate, based on the first model and the second model, one or more control parameters representing a relation between a control reference and the command for causing the controlled object to follow the control reference; and control the controlled object to cause the state of the controlled object to follow the control reference based at least in part on the control reference and the one or more control parameters.

Modeling of controlled object

A wireless power receiving system includes: a power receiving device having a power receiving coil configured to receive electric power supplied wirelessly from a power transmission coil of a power transmission device installed on a road surface, at least part of the power receiving coil being contained in a vehicle wheel; and in-vehicle devices installed in a mobile object, the in-vehicle devices being energizably connected to the power receiving device. The power receiving device transmits the received electric power to the in-vehicle devices.

Wireless power receiving system, mobile object, and vehicle wheel

A dynamic wireless power transfer system includes a power transmission coil, a power transmission circuit, a power reception coil, a power reception circuit, and a relay circuit. The power transmission coil is provided in a road. The power transmission circuit supplies electric power to the power transmission coil. The power reception coil is provided in a vehicle. The power reception circuit is connected to the power reception coil. The relay circuit transfers electric power between the power transmission coil and the power reception coil in a contactless manner.

Dynamic wireless power transfer system

A control system according to an embodiment includes a motor configured to drive a link, a first sensor configured to detect information about the driving by the motor or information about a relation between the driving means and the load member as first sensor information, a second sensor configured to detect information about a displacement of the link as second sensor information, and a control unit configured to perform feedback control of the driving means so as to follow a command value in a two-inertial system model including an inertial system on a load side and an inertial system on a driving side. The control unit includes a disturbance observer configured to estimate a disturbance, and a filter configured to convert an estimated value of the disturbance into a driving force of the motor.

Control system, control method, and control program

A control device to perform feedback control based on a current value, and output a first voltage value includes a feedforward controller using an inverse model of a plant; a feedforward voltage corrector to correct a voltage disturbance due to a modeling error between the plant and a model of the plant; a repetitive controller to learn periodic current disturbances; and a switch. The switch is ON when the current response is in a steady state, and the repetitive controller learns the disturbances and corrects a command current value. A feedback controller outputs the first voltage value by performing the feedback control based on a current value from the corrected command current value, and inputs the command current value to the inverse model to generate a second voltage value. The control device outputs a sum of the first and the second voltage value as a command voltage value.

Plant control device that corrects for modeling error and periodic disturbances

In-car speaker

Audio speaker enclosure

Operating device

An in-wheel motor system can drive an in-wheel motor stably, and also allows power feeding from the road surface, even when transmission and reception coils are misaligned. An in-wheel motor system () includes a power transmitter () that utilizes a resonance phenomenon using a magnetic field. The power transmitter () transmits power (P) wirelessly from the vehicle body to an in-wheel motor () mounted in a wheel. The in-wheel motor system () may also include a communication interface () that communicates between the vehicle body and the wheel, and the communication interface () may transmit a control signal (CTL) for driving the in-wheel motor.

In-wheel motor system

A log analysis system includes a first processor unit, a second processor unit, a third processor unit, and a fourth processor unit. The first processor unit normalizes the detection log acquired by an acquirer, allocating the detection log into predefined monitoring target units, and outputs the monitoring target units. The second processor unit appends common information based on a predefined rule to each of the monitoring target units of the detection log output from the first processor unit, arranges the monitoring target units into information granularities based on the content of the detection log and common information, and outputs the monitoring target units as analysis unit information. The third processor unit gathers the analysis unit information output from the second processor unit and setting detection target event candidates based on a predefined rule, and outputs the detection target event candidates and the determination results.

Log analysis system

A machine tool includes a spindle retaining a tool, a spindle motor, a feed device relatively moving a workpiece and a tool with a feed motor, a spindle motor control unit, and a feed motor control unit. In a method of machining a workpiece with the machine tool, the spindle motor control unit continuously varies a rotational speed of the spindle in a periodic or non-periodic manner with a predetermined amplitude with respect to a target rotational speed. The feed motor control unit continuously varies a relative moving speed between the tool and the workpiece in synchronization with the spindle motor such that a ratio of the rotational speed of the spindle to the moving speed does not become constant at least in a predetermined time zone in which a spindle speed reaches a maximal value and a predetermined time zone in which the spindle speed reaches a minimal value.

Workpiece machining method

A log analysis system for analyze a detection log detected in a monitoring target system includes an acquisition device for detecting detection target processes performed in the monitoring target system, and acquiring a detection log of the detection target processes; and a processor device for processing the detection log acquired by the acquirer. The processor device includes a plurality of processing blocks that perform processing on the detection log sequentially. The processor device performs processing while sending the detection log in order from a most-upstream processing block to downstream processing blocks. A most-downstream processing block of the processor device notifies the most-upstream processing block of the processor device that the detection log has been received. For a detection log being processed that cannot be confirmed to have arrived at the most-downstream processing block, the most-upstream processing block of the processor device resends the detection log to a downstream processing block.

A controller has a varying speed signal generation unit generating a varying speed command signal varying at predetermined amplitude and period, a current control unit generating a current command signal based on the varying speed command signal, a feedback control unit generating a correction signal based on a deviation between the varying speed command signal and a present rotational speed of the spindle motor and adding the correction signal to the current command signal, and a learning control unit calculating a disturbance component caused by cutting resistance based on the deviation every predetermined rotation angle of the spindle motor and, in synchronism with a rotation angle of the spindle motor corresponding to the varying speed command signal input into the current control unit, generating a compensation signal based on the disturbance component corresponding to the rotation angle and adding the compensation signal to the varying speed command signal.

Controller for spindle motor

Growing community of inventors

Tokyo, Japan

Hiroshi Fujimoto