研究者データベース
大和 駿太郎YAMATO Shuntaroヤマト シユンタロウ
| ■所属部署名 | 工学研究院 機械システム工学部門 | |||
| ■職名 | 准教授 | |||
Last Updated :2026/07/29
業績情報
氏名・連絡先
氏名
ヤマト シユンタロウ, 大和 駿太郎, YAMATO Shuntaro個人ホームページ
https://tuat-yamato.jp/
主たる所属・職名
工学研究院 機械システム工学部門, 准教授
経歴
- 東京農工大学
工学研究院先端機械システム部門
准教授
自 2024年10月, 至 9999年 - 京都大学
大学院工学研究科 マイクロエンジニアリング専攻
特定助教
自 2021年04月, 至 2024年09月 - 日本学術振興会
特別研究員（DC2）
自 2019年04月, 至 2021年03月 - ハノーファー大学生産工学・工作機械研究所
リサーチアシスタント
自 2016年12月, 至 2017年01月
学歴
学位
研究分野
研究キーワード
科学研究費助成事業
- 若手研究
精密形状の自動直接創成を実現するCAM-CNC統合ダイレクトFJPシステムの開発
自 2022年, 至 2024年 - 基盤研究(B)
アブレッシブ流体ジェットによるガラス基板への自在表面創成と機能性表面への展開
自 2025年, 至 2027年
論文
- Development of a Contactless Load Generator for Spindle Dynamic Compliance Measurement
Kazuma Yokohara; Shuntaro Yamato; Atsushi Matsubara
Proceedings of 2024 International Symposium on Flexible Automation
American Society of Mechanical Engineers
Abstract The stiffness of the spindle is known to vary depending on the operating conditions. A convenient measurement method is necessary to evaluate the dynamic stiffness of various spindles. In this study, a small electromagnetic load generator was developed to measure the dynamic compliance of the spindle. In this paper, we report the results of measuring dynamic compliance by exciting the spindle of an actual vertical machining center using this generator.
2024年07月21日, DOI(公開)(r-map) - Granular vibration pumping system for handling and characterizing particulate materials
Masato Adachi; Kenta Shirode; Shuntaro Yamato; Kosuke Tanaka; Hiroshi Kanamori
Review of Scientific Instruments
AIP Publishing
A unique setup for a granular vibration pumping system was developed to ease the installation into a wide variety of granular handling processes and provide flexible options for granular physics research. Although the granular vibration pumping system can notably lift granular materials with an oscillating pipe, the climbing mechanism and related granular physics are yet to be clarified thoroughly. The new setup employs an eccentric cam mechanism as the excitation source, a linear system with dust tolerance, and a recording system, making it simple, compact, and adaptable for extending experiments. The excitation mechanism generated a clear sinusoidal vibration in the pipe, realizing better reproducibility of the climbing motions of glass beads. Moreover, the compact design facilitates the close placement of multiple pipes vibrating individually, which affects the transport performance. In addition, various types of sample cells that store particles and the imaging system allow for the detailed observation of particle motions in the pipes and even the sample cells. This developed system provides easy and accurate tuning of the existing parameters of the granular vibration pumping system, as well as new options for a further understanding of granular physics.
2024年05月01日, 研究論文（学術雑誌）, 共同, 95, 5, 0034-6748, DOI(公開)(r-map) - Concurrent process and feedrate scheduling with convoluted basis functions and its application to fluid jet polishing
Shuntaro Yamato; Burak Sencer; Anthony Beaucamp
International Journal of Machine Tools and Manufacture
Elsevier BV
Non-traditional laser and fluid jet processes exhibit time-dependent material removal characteristics. The feedrate profile must be planned carefully along the toolpath for accurate surface profile generation while ensuring that the kinematic limits of machine tools are not violated. Conventional methods iteratively solve a deconvolution/convolution problem on the dwell-time density (reciprocal of the feedrate profile) that is computationally heavy, may leave significant residual processing errors, and even generate infeasible feed profiles with the manufacturing equipment. This paper proposes a novel approach that fully addresses the shortcomings above. Dwell-time density is first expressed as a continuous B-spline profile. The associated dwell basis functions (DBF) are convolved with the process influence function (PIF) to generate new process basis functions (PBF). This approach conveniently allows the posing of the problem as a concurrent linear least-squares problem on the control points shared by the DBFs and PBFs while ensuring the numerical stability of the solution and smoothness of the feed profile. To mitigate excessive acceleration peaks and any ringing effect around the edges of the toolpath, this paper also presents methodologies for stabilizing the scheduled feedrate profile by introducing knot vector adjustments (adaptive knot dropping) and linear edge constraints. The effectiveness of the proposed method is demonstrated and validated through simulation case studies and experimentally in fluid jet processing of precision optics. Results indicate that the proposed technique overcomes the limitations of conventional strategies and allows high-frequency surface components beyond the first zero-power frequency of the process footprint to be tracked while still generating a smooth feed profile within the acceleration limits of a machine tool. This ability stems from the localization characteristics associated with the basis functions. By improving the accuracy of high-frequency components, the proposed method exhibits the potential to fabricate topographies with sharper edges, which has been a challenge for conventional techniques.
2024年04月, 研究論文（学術雑誌）, 共同, 197, 0890-6955, DOI(公開)(r-map), 104135, 104135 - Harmonics Elimination by Periodic/Aperiodic Separation Filter for Chatter Detection
Hisayoshi Muramatsu; Shuntaro Yamato
システム制御情報学会論文誌
The Institute of Systems, Control and Information Engineers
2023年03月15日, 36, 3, 1342-5668, DOI(公開)(r-map), 64, 71 - Feed scheduling for time-dependent machining processes by optimization of bulk removal and NC blocks
Anthony Beaucamp; Yuichi Mizoue; Shuntaro Yamato; Burak Sencer
Journal of Materials Processing Technology
Elsevier BV
2023年03月, 312, 0924-0136, DOI(公開)(r-map), 117786, 117786 - Hybrid tool combining stiff and elastic grinding
Ashwani Pratap; Shuntaro Yamato; Anthony Beaucamp
CIRP Annals
Elsevier BV
2023年, 72, 1, 0007-8506, DOI(公開)(r-map), 281, 284 - Novel Deconvolution Based Federate Scheduling Towards New Class of CAM for Time-Dependent Processes
Shuntaro Yamato; Anthony Beaucamp; Burak Sencer
Proceedings of The International Symposium on Flexible Automation
2022年07月, 2022, DOI(公開)(r-map), 32, 35 - Development of Automatic Chatter Suppression System in Parallel Milling by Real-Time Spindle Speed Control with Observer-Based Chatter Monitoring
Shuntaro Yamato; Kenichi Nakanishi; Norikazu Suzuki; Yasuhiro Kakinuma
International Journal of Precision Engineering and Manufacturing
Springer Science and Business Media LLC
2021年01月22日, 22, 2, 2234-7593, DOI(公開)(r-map), 227, 240 - Self-acting optimal design of spindle speed variation for regenerative chatter suppression based on novel analysis of internal process energy behavior
Shuntaro Yamato; Takamichi Ito; Hirohiko Matsuzaki; Jun Fujita; Yasuhiro Kakinuma
International Journal of Machine Tools and Manufacture
Elsevier BV
2020年12月, 159, 0890-6955, DOI(公開)(r-map), 103639, 103639 - Investigation of Correlation Between Process Energy Balance and Phase Shift Variation of Chatter Vibration in Spindle Speed Variation
Shuntaro Yamato; Hirohiko Matsuzaki; Takamichi Ito; Yasuhiro Kakinuma
JSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing
American Society of Mechanical Engineers
Abstract It is widely known that the spindle speed variation (SSV) is an effective technology for chatter suppression, especially in the turning or boring process. Its simple optimal design, however, is not a simple task. In the past, certain research works considered the chatter onset from the perspective of process energy balance in a vibration cycle. The phase shift between previous (i.e., outer modulation) and present vibrations (i.e., inner modulation) of chatter is a key factor in the process energy balance. The SSV can be conceptually interpreted as a technique that continuously perturbs the phase shift between the inner and outer modulations, thereby changing the process energy balance. Simply put, the chatter energy can be controlled by applying the SSV to suppress the chatter. This study investigates the correlation between the process energy balance and phase shift behavior in the sinusoidal SSV through numerical energy simulation. The results indicate that the phase shift at the maximum spindle speed is an important factor to minimize the total energy balance (i.e., to dissipate the chatter energy) in the SSV cycle. This probably corresponds to the fact that the beat vibration tends to occur near the maximum spindle speed in the SSV. The insights gained from this study are anticipated to serve as a guideline for shaping the phase shift profile in the SSV to effectively suppress chatter vibration.
2020年09月03日, DOI(公開)(r-map) - Experimental verification of design methodology for chatter suppression in tool swing–assisted parallel turning
Shuntaro Yamato; Kenichi Nakanishi; Norikazu Suzuki; Yasuhiro Kakinuma
The International Journal of Advanced Manufacturing Technology
Springer Science and Business Media LLC
2020年08月28日, 110, 7-8, 0268-3768, DOI(公開)(r-map), 1759, 1771 - Precise Cutting Force Estimation by Hybrid Estimation of DC/AC Components
Taiki Sato; Shuntaro Yamato; Yasuhiro Imabeppu; Naruhiro Irino; Yasuhiro Kakinuma
2020 International Symposium on Flexible Automation
American Society of Mechanical Engineers
Abstract External sensor-less cutting force estimation using a load-side disturbance observer (LDOB) has potential to estimate the cutting force with high accuracy in both feed and cross-feed directions. However, the accuracy of its low frequency components in feed direction decrease due to effect of the friction and heat of a ball-screw-driven stage. In this study, DC and AC components of the cutting force is estimated by different methods; friction-compensated motor thrust force and LDOB, and the cutting force was estimated in real time by hybridizing them. In particular, regarding the friction model, the dynamic and static characteristics of the friction force in each axis (X, Y, Z) were identified from the idling test results. In addition to the model that depends on the velocity, the characteristics of the friction that depend on the position was also identified and considered when compensating for the motor thrust force. Then, a simple moving average filter with an appropriate window length is applied to the cutting force by LDOB and motor thrust force, and the DC component error of LDOB is corrected by that of motor thrust force. The validity of the proposed method was evaluated through end-milling tests. The experimental results showed that estimation accuracy of cutting force using the proposed method can be greatly improved in feed directions. On the other hand, in cross-feed direction, the cutting estimation was performed using the conventional LDOB.
2020年07月08日, DOI(公開)(r-map) - Precompensation of machine dynamics for cutting force estimation based on disturbance observer
Shuntaro Yamato; Yasuhiro Kakinuma
CIRP Annals
Elsevier BV
2020年, 69, 1, 0007-8506, DOI(公開)(r-map), 333, 336 - Enhancement of cutting force observer by identification of position and force-amplitude dependent model parameters
Shuntaro Yamato; Akihiro Sugiyama; Norikazu Suzuki; Naruhiro Irino; Yasuhiro Imabeppu; Yasuhiro Kakinuma
The International Journal of Advanced Manufacturing Technology
Springer Science and Business Media LLC
2019年07月15日, 104, 9-12, 0268-3768, DOI(公開)(r-map), 3589, 3605 - Chatter Suppression in Parallel Turning Assisted with Tool Swing Motion Provided by Feed System
Shuntaro Yamato; Toshiki Okuma; Kenichi Nakanishi; Junji Tachibana; Norikazu Suzuki; Yasuhiro Kakinuma
International Journal of Automation Technology
Fuji Technology Press Ltd.
Parallel turning technology has been attracting attention as an important technology to enhance the productivity of multitasking machine tools. To maximize the productivity advantage of parallel turning, chatter avoidance or suppression is one of the most noteworthy concerns. In this study, a novel chatter suppression technique using tool swing motion is provided by a feed drive system. The optimal design methodology of the tool swing motion for effective chatter suppression is also introduced based on its analogy with the spindle speed variation technique under the shared-surface parallel turning and rigid-tool and flexible-workpiece assumptions. The proposed method was evaluated with regard to the chatter stabilizing performance and workpiece runout as compared to conventional equal pitch turning and unequal pitch turning for chatter suppression. As a result, the proposed tool swing parallel turning exhibited a high chatter stabilizing performance without eccentricity of the workpiece and enhanced surface quality, although particular swing marks were left on the machined surface.
2019年01月05日, 13, 1, 1881-7629, DOI(公開)(r-map), 80, 91 - Enhancement of Sensor-less Cutting Force Estimation by Tuning of Observer Parameters from Cutting Test
Shuntaro Yamato; Yasuhiro Imabeppu; Naruhiro Irino; Norikazu Suzuki; Yasuhiro Kakinuma
Procedia Manufacturing
Elsevier BV
2019年, 41, 2351-9789, DOI(公開)(r-map), 272, 279 - Integrated in-process chatter monitoring and automatic suppression with adaptive pitch control in parallel turning
Shuntaro Yamato; Yuki Yamada; Kenichi Nakanishi; Norikazu Suzuki; Hayato Yoshioka; Yasuhiro Kakinuma
Advances in Manufacturing
Springer Science and Business Media LLC
2018年05月18日, 6, 3, 2095-3127, DOI(公開)(r-map), 291, 300 - Sensor-less on-line chatter detection in turning process based on phase monitoring using power factor theory
Shuntaro Yamato; Takayuki Hirano; Yuki Yamada; Ryo Koike; Yasuhiro Kakinuma
Precision Engineering
Elsevier BV
2018年01月, 51, 0141-6359, DOI(公開)(r-map), 103, 116 - Programmable Optimal Design of Sinusoidal Spindle Speed Variation for Regenerative Chatter Suppression
Shuntaro Yamato; Takamichi Ito; Hirohiko Matsuzaki; Yasuhiro Kakinuma
Procedia Manufacturing
Elsevier BV
2018年, 18, 2351-9789, DOI(公開)(r-map), 152, 160 - Development of sensorless chatter detection method in ball screw drive system applying mode decoupling
Akihiro Sugiyama; Yuki Yamada; Shuntaro Yamato; Yasuhiro Kakinuma
IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society
IEEE
2017年10月, DOI(公開)(r-map) - Analysis of tool posture control method on curved surface using polishing machine with 5-axis serial-parallel mechanism
Ryosuke Asaga; Shuntaro Yamato; Yasuhiro Kakinuma
IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society
IEEE
2017年10月, DOI(公開)(r-map) - Mode decoupled and sensorless cutting force monitoring based on multi-encoder
Yuki Yamada; Shuntaro Yamato; Yasuhiro Kakinuma
The International Journal of Advanced Manufacturing Technology
Springer Science and Business Media LLC
2017年05月10日, 92, 9-12, 0268-3768, DOI(公開)(r-map), 4081, 4093 - Phase shift monitoring based on mode-decoupled disturbance observer for chatter detection
Shuntaro YAMATO; Yuki YAMADA; Takamichi ITO; Hirohiko MATSUZAKI; Yasuhiro KAKINUMA
Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21
Japan Society of Mechanical Engineers
2017年, 2017.9, 0, DOI(公開)(r-map), 019, 019 - Cutting force reconstruction in milling by multi-sensor fusion with hybrid aid of process and data-driven models
Yamato, Shuntaro
CIRP ANNALS-MANUFACTURING TECHNOLOGY
ELSEVIER
This paper proposes an approach to cutting force reconstruction in milling combining a machine learning model with cutting process simulations. The machine learning model is developed in the feature space of amplitude spectra associated with the tooth-passing components extracted through the moving Fourier transform of time series data. Subsequently, the cutting force time waveform is reconstructed by integrating the estimated amplitude spectra with phase information provided by a cutting simulator. This approach facilitates efficient model construction compared to directly using time waveforms for training. It also enables straightforward multiple-sensor fusion using the ML model, thereby enhancing estimation performance. (c) 2025 CIRP. Published by Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
2025年, 研究論文（学術雑誌）, 単独, 74, 1, 0007-8506, DOI(公開)(r-map), 517, 521 - Cleaning performance of an electrodynamic dust shield under low-frequency vibrations
Nitano, Ryudai; Mitsunaga, Shunsuke; Yamato, Shuntaro; Tanaka, Kosuke; Kanamori, Hiroshi; Adachi, Masato
POWDER TECHNOLOGY
ELSEVIER
Dust mitigation is one of the most critical challenges in lunar exploration activities, and an electrodynamic dust shield (EDS) has been developed as a promising technology for dust removal. This paper presents an investigation combining an EDS with the assistance of low-frequency vibrations. Cleaning experiments were conducted on size-sorted particles of the lunar-regolith simulant using an EDS system mounted on vibrating stages, where the vibration frequency, amplitude, strength, and direction could be varied. Experimental results revealed that the assistance of horizontal vibration combined with the electrostatic force led to higher removal efficiencies for small- and medium-sized particles (with diameters less than 25 mu m, in the range 50-75 mu m, respectively). The horizontal vibration caused the rotational motion of aggregates of small- and medium-sized particles, enhancing their transport by the electrostatic traveling wave. The vibration itself was the dominant force that contributed to cleaning of the larger particles with diameters of 250-500 mu m. Increasing the vibration intensity improved removal efficiency.
2025年05月15日, 研究論文（学術雑誌）, 共同, 457, 0032-5910, DOI(公開)(r-map) - Fluid Jet Polishing of Glass Surfaces to Achieve Nanoroughness for Dust Mitigation of Optical Systems
Nitano, Ryudai; Yamato, Shuntaro; Mineyuki, Nobuya; Yasuda, Kohei; Adachi, Masato
ACS OMEGA
AMER CHEMICAL SOC
Optical components and devices, such as camera lenses, thermally controlled optical surfaces, and solar panels, are often exposed to dusty environments, where particulate matter adheres to their surfaces, degrading their optical performance. To address this challenge, we employed a fluid jet polishing (FJP) technique to fabricate nanoroughness on the glass surfaces of exterior elements, mitigating dust adhesion without compromising their high optical qualities. FJP successfully produced various nanoroughness levels by varying the sizes of abrasive particles. The adhesion forces of fine particles at different locations on glass surfaces were quantitatively measured by using atomic force microscopy. The results revealed that the forces were reduced by more than 1 order of magnitude on processed surfaces with increasing local surface roughness, primarily owing to the decreased effective contact area and separation distance, which weakened the van der Waals interactions and electrostatic forces. Furthermore, dust deposition tests using lunar regolith simulant particles with irregular shapes on the processed glass demonstrated the dust mitigation effect, particularly for substrates processed with fine abrasives with a median diameter of 2 mu m. The optical properties of the processed glass substrates were also evaluated in terms of haze and transmittance. While some surfaces processed with coarse abrasives exhibited increased haze and reduced transmittance owing to light scattering, substrates processed with fine abrasives maintained high visible transmittance and low haze. The superior optical performance was attributed to the antireflective effects induced by smooth refractive index gradients realized by finely processed glass surfaces, along with effective dust mitigation. FJP offers a flexible and scalable approach for tailoring the surface structure of glass materials, providing practical dust mitigation solutions for advanced optical applications.
2025年12月30日, 研究論文（学術雑誌）, 共同, 10, 51, 2470-1343, DOI(公開)(r-map), 63369, 63379 - A Simplified Estimation of Spindle Dynamic Compliance From Current Measurement for Contactless Electromagnetic Excitation
Iwai, Kai; Yamato, Shuntaro; Matsubara, Atsushi
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
ASME
Dynamic stiffness during spindle rotation is important in the performance evaluation of machine tools. A method for measuring dynamic compliance, which is the reciprocal of dynamic stiffness, using a load generator in uniaxial and unidirectional was investigated. An electromagnetic force generation model was experimentally constructed using static coil current and load measurements. Using this model, the vibratory force was calculated. The excitation conditions without gap effect were set, and the dynamic compliance was estimated by conducting actual vibration experiments. The estimated dynamic compliance was in good agreement with the dynamic compliance obtained from the force measurement, indicating that the proposed method can perform the measurement efficiently.
2025年01月01日, 研究論文（学術雑誌）, 共同, 147, 1, 1087-1357, DOI(公開)(r-map) - Static and Dynamic Measurements of Spindle System During Rotation by Noncontact Electromagnetic Loading System
Yamato, Shuntaro; Yokohara, Kazuma; Nara, Yuki; Matsubara, Atsushi
INTERNATIONAL JOURNAL OF AUTOMATION TECHNOLOGY
Fuji Technology Press
The static and dynamic characteristics of the spindle system significantly influence machining accuracy and efficiency. High static and dynamic stiffnesses and thermal stability are required for high-precision and high-efficiency machining. The dynamics of spindle systems are affected by centrifugal forces and thermal expansion in response to spindle rotation. A noncontact electromagnetic loading (EML) system has great potential for measuring spindle characteristics under rotational conditions. This study presents a state-of-the-art design and performance of the EML system, which is an improvement on the system used in previous studies. Detailed experimental design and signal processing are shown for static and dynamic performance measurements, including advanced hardware-in-the-loop simulation of the intermittent milling process using the developed EML system. Some of the representative results of each test are presented, and future research questions are discussed.
2025年01月05日, 研究論文（学術雑誌）, 共同, 19, 1, 1881-7629, DOI(公開)(r-map), 24, 40
委員歴
- 第11回JSME先端生産技術に関する国際会議（LEM21）
実行委員会 プログラム委員
自 202411, 至 202603 - The 19th International Conference on Precision Engineering (ICPE 2022)
Executive Committee
自 202201, 至 202212
メディア報道
受賞
- 社団法人日本機械学会 生産加工・工作機械部門
日本機械学会 生産加工・工作機械部門 優秀講演論文表彰
「Abrasive water jet micro machiningにおける送り速度制御による三次元微細形状創成」
第15回日本機械学会 生産加工・工作機械部門講演会において、生産加工・工作機械技術の向上に大きく資する特に優れた論文に対して授与される
2024年10月04日 - システム制御情報学会
産業技術賞
2024年05月 - 日本精密工学会
2023年精密工学会春季大会ベストプレゼンテーション賞
2023年07月 - 一般社団法人 日本機械学会中国支部
日本機械学会中国支部賞 技術創造賞
2023年03月 - International Symposium on Flexible Automation 2022
Young Investigator Award
2022年07月 - 一般社団法人 日本機械学会
日本機械学会奨励賞（研究）
2022年04月 - 公益財団法人 マザック財団
優秀論文表彰
2021年05月 - 慶應義塾大学
藤原賞
2021年03月 - 公益財団法人 マザック財団
優秀論文表彰
2020年05月 - 8th International Conference of Asian Society for Precision Engineering and Nanotechnology
Best Paper Award
2019年11月 - 日本機械学会第13回生産加工・工作機械部門講演会
部門一般表彰優秀講演論文賞
2019年10月 - 公益財団法人 工作機械技術振興財団
第40次工作機械振興賞・論文賞
2019年06月 - 公益社団法人 精密工学会
第35回沼田記念論文賞
2019年03月 - 公益財団法人 マザック財団
優秀論文表彰
2018年05月 - 慶應義塾大学システムデザイン工学科
優秀卒業研究発表賞
2016年03月 - 公益社団法人 精密工学会
エクセレントプレゼンテーション賞
2016年03月