精密工学会誌
Online ISSN : 1882-675X
Print ISSN : 0912-0289
ISSN-L : 0912-0289
84 巻 , 10 号
選択された号の論文の17件中1~17を表示しています
特集:専門委員会・分科会研究レビュー
展望
私の歩んできた道
グラビアとインタビュー 精密工学の最前線
はじめての精密工学
研究所・研究室紹介
 
論文
  • 長谷 智紘, 森山 健, 西村 晃紀, 前田 俊二
    2018 年 84 巻 10 号 p. 868-875
    発行日: 2018/10/05
    公開日: 2018/10/05
    ジャーナル フリー

    The output of the wind power depends on natural phenomena, so the influence on the connection for power system is of particular concern. Therefore, if wind power generation can be predicted, effective use of wind energy can be expected. This study proposes the method for wind speed prediction with neural network, NN, and VAR model using the time-series wind speed data of multiple neighboring sites. Also the study evaluates the wind speed prediction performance with wind data of multiple sites including meteorological towers in Tohoku district.

  • ―一定回転時の発電特性―
    大西 吉徳, 田島 雄貴, 保坂 寛, 山下 明
    2018 年 84 巻 10 号 p. 876-880
    発行日: 2018/10/05
    公開日: 2018/10/05
    ジャーナル フリー

    A gyroscopic power generator is developed which generates 1.8 W by using a rotor of 100 mm diameter spinning at 500 rpm. In the conventional vibration generators which use simple vibration, the power was less than several tens of mW in the wearable size. The gyroscopic generator increases the inertia force by spinning the pendulum in high speed and causing the gyro effect. Also a mathematical model is developed which calculates generated power considering the gyro effect, electromechanical transformation and the gear loss. The calculated powers closely coincided with experimental ones in the range from 1 mW to 1.8 W. Finally the performance of generators which have the same device sizes and rotor spinning speeds as those of 2.5" and 3.5" HDD are calculated. They generate 0.72 W and 1.8 W respectively which show a possibility to be used not only for IoT's but also for motor driving sources used in, for example, wearable air conditioners.

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