Faculty Profiles - YAMAGUCHI Daisuke

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Zero-power control of flux-path control magnetic suspension system with flux-interrupting plates

T. Mizuno, M. Takasaki, M. Hara, D. Yamaguchi, Y. Ishino

LDIA 2017 - 11th International Symposium on Linear Drives for Industry Applications 2017.11.3 Institute of Electrical and Electronics Engineers Inc.

Event date： 2017.11.3

Language：English

The feasibility of zero-power control in flux-path control magnetic suspension is discussed. In the flux-path control magnetic suspension system, ferromagnetic control plates are inserted between a permanent magnet (magnetic source) and a floator and moved to vary the flux from the magnetic source to the floator. The zero-power control has been applied in active magnetic suspension with a DC electromagnet. In the zero-power controlled system, the control current was kept virtually zero in the steady states. The applicability of the zero-power control to the flux-path control magnetic suspension is discussed in this paper. The conditions required to achieve the zero-power control is presented in an analytical form. Experiments are carried in a fabricated apparatus to certify the theoretical predictions.

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Precise positioning characteristics of multi-mode ultrasonic motor

Masaya Tkasaki, Zhang Shuo, Masayuki Hara, Daisuke Yamaguchi, Yuji Ishino, Takeshi Mizuno

2015 IEEE International Ultrasonics Symposium, IUS 2015 2015.11.13 Institute of Electrical and Electronics Engineers Inc.

Event date： 2015.11.13

Language：English

Previously developed multi-mode ultrasonic motor has three driving modes, which are fast driving mode with figure-of-eight locus resonant vibration, impact driving with saw tooth wave form and DC voltage driving mode. The impact driving mode can be divided into two categories. One utilized resonant vibration (fast) and the other uses individual off resonance vibration (slow). For precise positioning, characteristics of stable driving of the slow impact driving mode and stroke of the DC mode are important. This paper reports the characteristics obtained through experiments.

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Comparison of zero-power controllers in double parallel magnetic suspension system with parallel connected coils

Yoshinori Narisawa, Daisuke Yamaguchi, Masayuki Hara, Masaya Takasaki, Takeshi Mizuno, Yuji Ishino

2015 10th Asian Control Conference: Emerging Control Techniques for a Sustainable World, ASCC 2015 2015.9.8 Institute of Electrical and Electronics Engineers Inc.

Event date： 2015.9.8

Language：English

A basic single-degree-of-freedom magnetic suspension system consists of one floator, one electromagnet and one amplifier. For multi-degrees-of-freedom control, multiple electromagnets and multiple amplifiers are necessary, which increases the cost of total system. As a means of overcoming this problem, parallel magnetic suspension has been proposed where multiple floators are controlled with a single power amplifier. Parallel magnetic suspension systems are classified into two types according to the output of the power amplifier: current-controlled and voltage-controlled. Voltage-controlled parallel magnetic suspension systems are classified into two types: series connected and parallel connected. The feasibilities of these systems have been already demonstrated in the previous work. This paper focuses on the voltage-controlled parallel magnetic suspension system with parallel-connected coils. Three approaches to zero-power control are applicable in such a system. This paper compares these approaches in a viewpoint of pole assignment. In addition, a relationship in the feedback gains between the three approaches are presented numerically.

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Development of non-contact carrier system using solar magnetic suspension (3ed report: Continuous 5-day and installation of sloping propulsion mechanism)

Yuji Ishino, Masaya Takasaki, Daisuke Yamaguchi, Takeshi Mizuno, Masayuki Hara

2015 10th Asian Control Conference: Emerging Control Techniques for a Sustainable World, ASCC 2015 2015.9.8 Institute of Electrical and Electronics Engineers Inc.

Event date： 2015.9.8

Language：English

A solar-powered magnetic suspension carrier system is developed in which the carrier is powered without contact. There are two conventional methods of powering the coils of the magnetic suspension carrier: (i) through wire, (ii) onboard battery (wireless) power supply. The contactless is lost in the former while stations for charging the battery are necessary in the latter. These problems are overcome by the proposed carrier system using solar magnetic suspension that can attain continuous levitation. The magnetic suspension carrier is assumed to operate inside rooms like inside a factory building. Because the generation power by solar cells is small, power saving us acritical requirement. Therefore, the zero power control is applied for suspension. In addition, low-power peripheral devices are fabricated. The developed carrier system achieved a five-day levitation without external power supply in a bright environment. In addition, a sloping propulsion mechanism was introduced. The mechanism consists of a track rail and two pillars with actuators to move up and down the track rail. The carrier slides and moves to the lower direction due to gravity below a sloped rail.

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Ultrasonic motor for sample spinning of solid-state nuclear magnetic resonance spectrometer in high magnetic field

Daisuke Yamaguchi, Dai Takeda, Takefumi Kanda, Koichi Suzumori

IEEE International Ultrasonics Symposium, IUS 2014.10.20 IEEE Computer Society

Event date： 2014.10.20

Language：English

The aim of this paper is to realize a new sample spinning unit for a solid-state nuclear magnetic resonance (NMR). In the solid-state NMR analysis, a sample spinning in high magnetic field is an important function. We have designed and fabricated the sample spinning unit using a low-profile ultrasonic motor for high magnetic field. The unit could be driven in high magnetic flux at 9.4 T. Soli-state NMR analysis of glycine was measured using the unit. We have succeeded in applying the ultrasonic motor for solid-state NMR analysis.

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Evaluation of thermal stress of transducers for cryogenic ultrasonic motors

Yuya Noguchi, Daisuke Yamaguchi, Takefumi Kanda, Koichi Suzumori

IEEE International Ultrasonics Symposium, IUS 2014.10.20 IEEE Computer Society

Event date： 2014.10.20

Language：English

An ultrasonic motor which can be driven at the condition from room temperature to cryogenic temperature has been designed, fabricated and evaluated. This motor has a bolt-clamped Langevin-type transducer which is suitable for cryogenic temperature. The aim of this paper is to evaluate the thermal stress of transducers. Each transducer is made of materials which had different thermal expansion coefficient, such as stainless, Ti, or invar. The thermal stress in the transducer made of Ti was the smallest. The rotation speed of the motor using the transducer made of Ti was evaluated at cryogenic temperature. The rotation speed was 1102 rpm at 4.6 K when the applied voltage was 100 V&lt
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p-p&lt
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.

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Evaluation of piezoelctric materials for cryogenic ultrasonic motor

Daisuke Yamaguchi, Takefumi Kanda, Koichi Suzumori

IEEE International Ultrasonics Symposium, IUS 2013

Event date： 2013

Language：English

This paper presents a fabrication and evaluation of an ultrasonic motor which can drive in an ultralow temperature environment. A piezoelectric performance of ferroelectric materials was evaluated at ultralow temperature. To measure the piezoelectric constant d31 of PMN-PT and PZT at ultralow temperature, the resonance-antiresonance method was applied. The d31 of the PMN-PT was higher than that of PZT at 4.5 K. Additionally, we have fabricated and evaluated an ultrasonic motor that have a bolt-clamped Langevin-type transducer. The performance of the transducer and the efficiency of the motor had similar decreasing tendency with driving temperature. © 2013 IEEE.

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Thermal Characteristics of a PMN-PT Single Crystal and an Ultrasonic Motor in Ultralow Temperature Environment

Yamaguchi Daisuke, Kanda Takefumi, Suzumori Koichi, Noguchi Yuya

Proceedings of Symposium on Ultrasonic Electronics 2012.11.13 Steering committee of symposium on ultrasonic electronics

極低温環境での使用を目的とした超音波モータへのPMN‐PT単結晶の応用

山口大介, 神田岳文, 鈴森康一, 黒田雅貴, 武田大

電磁力関連のダイナミックスシンポジウム講演論文集 2012.5.16

磁気浮上系のリセット要素による安定化第3報積分補償器との併用

石野裕二, 水野毅, 高崎正也, 山口大介

第62回自動制御連合講演会 2019.11.10

磁路制御式磁気浮上の大ギャップ化に関する研究（第5報：浮上体の多自由度マニピュレーション）

水野毅, 石橋尚宜, 石野裕二, 高崎正也, 山口大介

第62回自動制御連合講演会 2019.11.10

クライオポンプの冷凍機用除振ユニットの開発第３報観測部の振動特性と除振の試み

高橋洋介, 水野毅, 石野裕二, 高崎正也, 山口大介

第62回自動制御連合講演会 2019.11.10

磁路制御式磁気浮上の大ギャップ化に関する研究（第5報：浮上体の多自由度マニピュレーション）

水野毅, 石橋尚宜, 石野裕二, 高崎正也, 山口大介

第62回自動制御連合講演会 2019.11.10

Improving measuring accuracy in relay feedback mass measurement system by a modified period measurement

Egawa Taku, Mizuno Takeshi, Takasaki Masaya, Ishino Yuji, Yamaguchi Daisuke

The Asia Pacific Measurement Forum on Mechanical Quantities, 2019 (APMF2019) 2019.11

交流磁気浮上を用いた遠心血液ポンプの提案

水野毅, アイシャビンティ, アブドゥッラザイク, 桑名克之, 高崎正也, 山口大介, 石野裕二

第28回MAGDAコンファレンス 2019.10.30

Study on Frequency Dependence of Ultrasonic Suspension

Masahiro Kubota, Masaya Takasaki, Daisuke Yamaguchi, Yuji Ishino, Takeshi Mizuno

The International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA2019) 2019.10

Higher resonant frequency of bulk wave ultrasonic transducer for tactile display

Hiroshi Kimura, Masaya Takasaki, Yuji Ishino, Daisuke Yamaguchi, Takeshi Mizuno

The International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA2019) 2019.10

Non-uniqueness of Steady-state Trajectory of Mass Measurement System with Restoring Force Compensation in addition to Relay Feedback of Velocity

Takeshi MIZUNO, Keisuke NISIZAWA, Yuji ISHINO, Masaya TAKASAKI, Daisuke YAMAGUCHI

The 2019 19th International Conference on Control, Automation and Systems (ICCAS 2019) 2019.10

超音波支持の周波数依存性に関する研究 -第一報振動子の製作と基礎実験-

窪田雅大, 髙﨑正也, 山口大介, 石野裕二, 水野毅

2019精密工学会秋季大会学術講演会 2019.9.5

バルク振動を用いた皮膚感覚ディスプレイ用超音波振動子の高周波数化

木村碩志, 髙﨑正也, 山口大介, 石野裕二, 水野毅

2019精密工学会秋季大会学術講演会 2019.9.5

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