著者
尾形 克彦
出版者
公益社団法人 計測自動制御学会
雑誌
自動制御 (ISSN:04477235)
巻号頁・発行日
vol.5, no.1, pp.11-15, 1958

This paper presents an analysis of nonlinear oscillations as responses of saturating servomechanisms subjected to periodic inputs.<BR>Conditions that make a system output oscillate with a subharmonic of the input frequency have been obtained.The possibility of the occurrence of subharmonic oscillations or frequency divisions can be estimated from the maximum value of theoutput-input amplitude ratio for a given input amplitude.<BR>The analytic solution for finding the maximum value of the output-input amplitude ratio of a saturating second order servomechanism as well as the analytic solution for finding the frequ ency response of such a system have been obtained.
著者
中村 あゆみ 古屋 晋一 合田 竜志 巳波 弘佳 長田 典子
出版者
公益社団法人 計測自動制御学会
雑誌
計測自動制御学会論文集 (ISSN:04534654)
巻号頁・発行日
vol.49, no.9, pp.840-845, 2013 (Released:2013-10-16)
参考文献数
11

The purpose of the present study was to assess effects of daily piano practice on speed and accuracy. When they were asked to play the trained tone sequence as fast and accurately as possible, the maximum rate of keystrokes increased after the practice, indicating enhancement of finger movement speed. This was also the case when playing an untrained tone sequence with the left hand and untrained right hand as fast as possible. A retention test, being performed two months after the final practice session, revealed no apparent deterioration of the hand motor functions, suggesting robustness of motor memory acquired through the piano practice. Finally, provision of visual feedback regarding rhythmic accuracy of keystrokes facilitated the movement accuracy, which implicates a potential of the augmented feedback for improving piano performance.
著者
寺野 隆雄
出版者
公益社団法人 計測自動制御学会
雑誌
計測と制御 (ISSN:04534662)
巻号頁・発行日
vol.55, no.8, pp.692-697, 2016-08-10 (Released:2016-08-26)
参考文献数
20
被引用文献数
1
著者
石原 正
出版者
公益社団法人 計測自動制御学会
雑誌
計測と制御 (ISSN:04534662)
巻号頁・発行日
vol.33, no.5, pp.382-389, 1994-05-10 (Released:2009-11-26)
参考文献数
30
著者
宮内 鉄也 白江 公輔
出版者
公益社団法人 計測自動制御学会
雑誌
計測と制御 (ISSN:04534662)
巻号頁・発行日
vol.1, no.7, pp.545-553, 1962-07-10 (Released:2010-10-21)

Electronic control system requires a very reliable D. C. amplifier of high gain, high response and yet low noise. Magnetic modulator type D. C. amplifier is very reliable, but the amplifier of 100c/s carrier type does not satisfy all of the above requirements. Instead or 100c/s type, therefore, 1 000c/s type is employed. This D. C. amplifier consists of a 500 c/s oscillator, magnetic modulator, 1 000c/s tuned amplifier and power amplifier. The oscillator and amplifiers are transistorized. As a result of using the 1 000c/s carrier type, the following characteristics have been obtained:1) Gain: 8×104 (mA/mA)2) Cut off frequency: 20c/s3)Noise level: 5×10-16W (i.e.0.002μA)4) Ambient temperature: -10°C-+70°CAlso described are the applications of this D. C. amplifier to an electronic control system and electrical interference caused by A. C. power line.
著者
高橋 宏治
出版者
公益社団法人 計測自動制御学会
雑誌
計測と制御 (ISSN:04534662)
巻号頁・発行日
vol.52, no.12, pp.1116-1121, 2013-12-10 (Released:2018-04-25)
参考文献数
11
被引用文献数
1
著者
荒牧 勇
出版者
公益社団法人 計測自動制御学会
雑誌
計測と制御 (ISSN:04534662)
巻号頁・発行日
vol.56, no.8, pp.563-567, 2017-08-10 (Released:2017-08-19)
参考文献数
22
被引用文献数
1
著者
松野 敏秀
出版者
公益社団法人 計測自動制御学会
雑誌
計測と制御 (ISSN:04534662)
巻号頁・発行日
vol.21, no.7, pp.717-722, 1982-07-10 (Released:2009-11-26)
参考文献数
3