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Akademický článek

Iterative learning control-based ripple compensation in web handling systems

Autor: Tomoya HOMAN, Kenta SEKI, Makoto IWASAKI

Publikováno v: Journal of Advanced Mechanical Design, Systems, and Manufacturing, Vol 17, Iss 4, Pp JAMDSM0046-JAMDSM0046 (2023)

A long flexible material called the web is converted into the final product through various processes such as printing, drying, coating, and laminating using a web handling system. The web is transported from an unwind roller to a rewind roller throu

Externí odkaz: https://doaj.org/article/e0c1ea6a164746a5b40989e0511ae779

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Akademický článek

Unexpected adhesive bowel obstruction after endoscopic submucosal dissection of early sigmoid colon cancer

Autor: Kenta Seki, Taku Sakamoto, Mai Ego Makiguchi, Naoya Toyoshima, Hiroyuki Takamaru, Masau Sekiguchi, Masayoshi Yamada, Shigeki Sekine, Yukihide Kanemitsu, Yutaka Saito

Publikováno v: DEN Open, Vol 3, Iss 1, Pp n/a-n/a (2023)

Abstract Various complications of colorectal endoscopic submucosal dissection (ESD) have been reported, including bleeding, penetration, perforation, and coagulation syndrome. However, the occurrence of bowel obstruction after ESD is rare. We report

Externí odkaz: https://doaj.org/article/aa29f70bedd14feaadf7702f9f380b47

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Akademický článek

High-precision positioning considering vibration and disturbance suppression in piezo-driven stage systems

Autor: Kenta SEKI, Daisuke NODA, Makoto IWASAKI

Publikováno v: Journal of Advanced Mechanical Design, Systems, and Manufacturing, Vol 11, Iss 3, Pp JAMDSM0039-JAMDSM0039 (2017)

This paper presents a controller design approach to compensate for the disturbances and achieve robust vibration suppression against variations in the resonant frequency in a piezo-driven stage system. Disturbances such as nonlinearities due to hyste

Externí odkaz: https://doaj.org/article/42368e1c6c784eb89eef62c66d12a35a

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Akademický článek

Model-based adaptive feedforward compensation for disturbance caused by overturning moment in 2-dimensional shaking table systems

Autor: Kenta SEKI, Makoto IWASAKI

Publikováno v: Mechanical Engineering Journal, Vol 4, Iss 3, Pp 16-00427-16-00427 (2017)

This paper presents a disturbance compensation approach using a model-based feedforward control with an adaptive algorithm for the two-dimensional (2D) shaking table systems. In the system, the overturning moment due to a specimen largely deteriorate

Externí odkaz: https://doaj.org/article/5e00ce5287de4ff3bfbf74b951ef6472

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Akademický článek

Modeling and disturbance compensation aided by multibody dynamics analysis in shaking table systems

Autor: Kenta SEKI, Makoto IWASAKI

Publikováno v: Mechanical Engineering Journal, Vol 2, Iss 5, Pp 15-00274-15-00274 (2015)

This paper presents an approach for modeling and disturbance compensation in multi-axis shaking table systems. Shaking table system is one of the facilities for seismic tests, where the accurate reproducibility of earthquake acceleration waveforms is

Externí odkaz: https://doaj.org/article/f82971f245de4767a60ee303e716b104

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Akademický článek

Robust controller design for dual-stage actuator against resonant frequency variations in load devices

Autor: Yusaku SHINOHARA, Kenta SEKI, Makoto IWASAKI, Hiroshi CHINDA, Masaki TAKAHASHI

Publikováno v: Nihon Kikai Gakkai ronbunshu, Vol 81, Iss 824, Pp 14-00351-14-00351 (2015)

This paper presents a controller design approach for load devices to provide robust properties against variations in resonant frequencies and disturbance forces in the mechanism. In the device, a pneumatic actuator and a voice coil motor are combined

Externí odkaz: https://doaj.org/article/784eb189287b4adab162524662330120

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