Sensorless control for a sophisticated artificial myocardial contraction by using shape memory alloy fibre

Y. Shiraishi, T. Yambe, Y. Saijo, F. Sato, A. Tanaka, M. Yoshizawa, T. K. Sugai, R. Sakata, Y. Luo, Y. Park, M. Uematsu, Mitsuo Umezu, T. Fujimoto, N. Masumoto, H. Liu, A. Baba, S. Konno, S. Nitta, K. Imachi, K. TabayashiH. Sasada, D. Homma

    研究成果: Conference contribution

    8 引用 (Scopus)

    抄録

    The authors have been developing an artificial myocardium, which is capable of supporting natural contractile function from the outside of the ventricle. The system was originally designed by using sophisticated covalent shape memory alloy fibres, and the surface did not implicate blood compatibility. The purpose of our study on the development of artificial myocardium was to achieve the assistance of myocardial functional reproduction by the integrative small mechanical elements without sensors, so that the effective circulatory support could be accomplished. In this study, the authors fabricated the prototype artificial myocardial assist unit composed of the sophisticated shape memory alloy fibre (Biometal), the diameter of which was 100 microns, and examined the mechanical response by using pulse width modulation (PWM) control method in each unit. Prior to the evaluation of dynamic characteristics, the relationship between strain and electric resistance and also the inditial response of each unit were obtained. The component for the PWM control was designed in order to regulate the myocardial contractile function, which consisted of an originally-designed RISC microcomputer with the input of displacement, and its output signal was controlled by pulse wave modulation method. As a result, the optimal PWM parameters were confirmed and the fibrous displacement was successfully regulated under the different heat transfer conditions simulating internal body temperature as well as bias tensile loading. Then it was indicated that this control theory might be applied for more sophisticated ventricular passive or active restraint by the artificial myocardium on physiological demand.

    元の言語English
    ホスト出版物のタイトルProceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - "Personalized Healthcare through Technology"
    ページ711-714
    ページ数4
    出版物ステータスPublished - 2008
    イベント30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - Vancouver, BC
    継続期間: 2008 8 202008 8 25

    Other

    Other30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08
    Vancouver, BC
    期間08/8/2008/8/25

    Fingerprint

    Myocardial Contraction
    Shape memory effect
    Pulse width modulation
    Pulse
    Myocardium
    Fibers
    Reduced instruction set computing
    Control theory
    Microcomputers
    Trace Elements
    Blood
    Body Temperature
    Electric Impedance
    Modulation
    Heat transfer
    Reproduction
    Hot Temperature
    Sensors
    Sensorless control
    Temperature

    ASJC Scopus subject areas

    • Computer Vision and Pattern Recognition
    • Signal Processing
    • Biomedical Engineering
    • Health Informatics

    これを引用

    Shiraishi, Y., Yambe, T., Saijo, Y., Sato, F., Tanaka, A., Yoshizawa, M., ... Homma, D. (2008). Sensorless control for a sophisticated artificial myocardial contraction by using shape memory alloy fibre. : Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - "Personalized Healthcare through Technology" (pp. 711-714). [4649251]

    Sensorless control for a sophisticated artificial myocardial contraction by using shape memory alloy fibre. / Shiraishi, Y.; Yambe, T.; Saijo, Y.; Sato, F.; Tanaka, A.; Yoshizawa, M.; Sugai, T. K.; Sakata, R.; Luo, Y.; Park, Y.; Uematsu, M.; Umezu, Mitsuo; Fujimoto, T.; Masumoto, N.; Liu, H.; Baba, A.; Konno, S.; Nitta, S.; Imachi, K.; Tabayashi, K.; Sasada, H.; Homma, D.

    Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - "Personalized Healthcare through Technology". 2008. p. 711-714 4649251.

    研究成果: Conference contribution

    Shiraishi, Y, Yambe, T, Saijo, Y, Sato, F, Tanaka, A, Yoshizawa, M, Sugai, TK, Sakata, R, Luo, Y, Park, Y, Uematsu, M, Umezu, M, Fujimoto, T, Masumoto, N, Liu, H, Baba, A, Konno, S, Nitta, S, Imachi, K, Tabayashi, K, Sasada, H & Homma, D 2008, Sensorless control for a sophisticated artificial myocardial contraction by using shape memory alloy fibre. : Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - "Personalized Healthcare through Technology"., 4649251, pp. 711-714, 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08, Vancouver, BC, 08/8/20.
    Shiraishi Y, Yambe T, Saijo Y, Sato F, Tanaka A, Yoshizawa M その他. Sensorless control for a sophisticated artificial myocardial contraction by using shape memory alloy fibre. : Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - "Personalized Healthcare through Technology". 2008. p. 711-714. 4649251
    Shiraishi, Y. ; Yambe, T. ; Saijo, Y. ; Sato, F. ; Tanaka, A. ; Yoshizawa, M. ; Sugai, T. K. ; Sakata, R. ; Luo, Y. ; Park, Y. ; Uematsu, M. ; Umezu, Mitsuo ; Fujimoto, T. ; Masumoto, N. ; Liu, H. ; Baba, A. ; Konno, S. ; Nitta, S. ; Imachi, K. ; Tabayashi, K. ; Sasada, H. ; Homma, D. / Sensorless control for a sophisticated artificial myocardial contraction by using shape memory alloy fibre. Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - "Personalized Healthcare through Technology". 2008. pp. 711-714
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    abstract = "The authors have been developing an artificial myocardium, which is capable of supporting natural contractile function from the outside of the ventricle. The system was originally designed by using sophisticated covalent shape memory alloy fibres, and the surface did not implicate blood compatibility. The purpose of our study on the development of artificial myocardium was to achieve the assistance of myocardial functional reproduction by the integrative small mechanical elements without sensors, so that the effective circulatory support could be accomplished. In this study, the authors fabricated the prototype artificial myocardial assist unit composed of the sophisticated shape memory alloy fibre (Biometal), the diameter of which was 100 microns, and examined the mechanical response by using pulse width modulation (PWM) control method in each unit. Prior to the evaluation of dynamic characteristics, the relationship between strain and electric resistance and also the inditial response of each unit were obtained. The component for the PWM control was designed in order to regulate the myocardial contractile function, which consisted of an originally-designed RISC microcomputer with the input of displacement, and its output signal was controlled by pulse wave modulation method. As a result, the optimal PWM parameters were confirmed and the fibrous displacement was successfully regulated under the different heat transfer conditions simulating internal body temperature as well as bias tensile loading. Then it was indicated that this control theory might be applied for more sophisticated ventricular passive or active restraint by the artificial myocardium on physiological demand.",
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    AU - Yoshizawa, M.

    AU - Sugai, T. K.

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    AU - Fujimoto, T.

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    AU - Liu, H.

    AU - Baba, A.

    AU - Konno, S.

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