著者

河原 遼太 小河原 加久治 新銀 秀徳

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.86, no.887, pp.19-00429, 2020 (Released:2020-07-25)

参考文献数

15

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This paper proposes a method of airspeed measurement using ultrasonic waves for control of micro UAVs. Measurement by pitot tube sensor generally used for aircraft control does not show high resolution and responsiveness in low speed flight. The proposed method employs the phase difference method to overcome the drawback of low resolution in the measurement. The efficiency of this method is demonstrated through flight experiments to estimate the angle of attack and the angle of side slip of a micro UAV from measured airspeed.

著者

岡屋 達也 小河原 加久治 新銀 秀徳 野本 正晃

出版者

一般社団法人 日本機械学会

雑誌

年次大会 2018 (ISSN:24242667)

巻号頁・発行日

pp.S0520305, 2018 (Released:2019-03-25)

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This paper studies the separation flow reduction effect around NACA0015 airfoil using PSJA. We expect to reduce fluctuations of wake velocity by PWM control input applied to PSJA using DFC. This paper shows change of the lift force by the DFC in 5m/s main flow velocity and 15deg angle of attack. We attempted two modes by setting 4msec delay time of DFC. DFC positive mode set to ON the PWM signal when the input exceeds the threshold. DFC reverse mode set to ON the PWM signal when the input falls below the threshold. The experimental results show that the DFC result with a delay time of 4ms recovers lift force compared to without control of PSJA. In the both modes 4msec delay time, lift force is maintained without depending on the threshold at 1 second driving start. At the threshold 0.01 of the reverse mode, lift force is kept than the other threshold.