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    VIBRATION CONTROL SYSTEM USING KURTOSIS RESPONSE SPECTRUM
    4.
    发明申请
    VIBRATION CONTROL SYSTEM USING KURTOSIS RESPONSE SPECTRUM 有权

    公开(公告)号：US20220373427A1

    公开(公告)日：2022-11-24

    申请号：US17705575

    申请日：2022-03-28

    Applicant: Osaka Research Institute of Industrial Science and Technology ,  IMV CORPORATION

    Inventor： Akira HOSOYAMA ,  Yuji NAKAURA ,  Yoshikado YAMAUCHI

    IPC: G01M7/02

    Abstract: The present invention proposes a parameter that appropriately characterizes non-Gaussianity in a random vibration test and realizes vibration control using the parameter. A vibration control system calculates a KRS of a response waveform. The system compares a reference KRS as a target and the response KRS, and controls a characteristic of a phase used to generate a waveform for control such that the response KRS becomes equal to the reference KRS. Upon generation of the waveform for control, the waveform for control is generated by applying an appropriate random phase to each frequency component of an amplitude corresponding to PSD for control. The system controls a characteristic of this random phase (for example, standard deviation of phase distribution, or the like) per frequency, and controls the KRS of the waveform for control. The system deforms the waveform for control on the basis of an equalization characteristic, for which a transfer function of the system is taken into consideration, and calculates a drive waveform. The system sequentially updates the equalization characteristic on the basis of the response waveform and the drive waveform. The calculated drive waveform is converted into a drive signal by a D/A convertor 26, is amplified by an amplifier 28, and is provided to a vibration generator 2.

    Polylactide-grafted cellulose nanofiber and production method thereof
    7.
    发明授权
    Polylactide-grafted cellulose nanofiber and production method thereof 有权

    公开(公告)号：US11046787B2

    公开(公告)日：2021-06-29

    申请号：US16612552

    申请日：2018-05-09

    Applicant: OSAKA RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE AND TECHNOLOGY ,  DAIO PAPER CORPORATION

    Inventor： Joji Kadota ,  Yasuyuki Agari ,  Hiroshi Hirano ,  Akinori Okada ,  Takaaki Imai

    IPC: C08B15/00 ,  C08G63/08 ,  C08K5/3432

    Abstract: Provided are a polylactide-grafted cellulose nanofiber that is suitable as a molding material, and a production method thereof. A polylactide-grafted cellulose nanofiber includes grafted cellulose having a graft chain bonding to cellulose constituting a cellulose nanofiber, wherein the graft chain is a polylactide, and a ratio of an absorbance derived from C═O of the polylactide to an absorbance derived from O—H of the cellulose on an infrared absorption spectrum is no less than 0.01 and no greater than 1,000. In addition, a production method of a polylactide-grafted cellulose nanofiber includes carrying out graft polymerization of a lactide to cellulose constituting a cellulose nanofiber in the presence of an organic polymerization catalyst which includes an amine and a salt obtained by reacting the amine with an acid. As the organic polymerization catalyst, 4-dimethylaminopyridine and 4-dimethylaminopyridinium triflate are preferred.

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