PSJAによるNACA0015翼周りの流れの離散時間遅延フィードバック制御

抄録

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.