![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
Abstract
The opposition control proposed by Choi et al. [Citation1] is investigated using direct numerical simulation to see how bandwidth-limited and noise-contaminated sensing influence its control performance. It is found that the sensing frequency can be reduced substantially when the control scheme is modified to account for the convection speed of the measured sensor signal. Noisy sensor signals are shown to strongly affect the achievable net energy saving rate and energy gain at high sensing frequencies, while their influence is weaker for reduced sensing frequencies. These results also hold for increased Reynolds number, where the performance of the control scheme is generally lower.
Acknowledgment
The authors greatly acknowledge the support by Deutsche Forschungsgemeinschaft through projects IRTG 1529, FR2823/2-1 and the Cluster of Excellence ‘Center of Smart Interfaces’ and by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, through Grand-in-Aid for Scientific Research (A) (no. 20246036). YH is grateful to the Japan Society for the Promotion of Science (JSPS) for the support through the Postdoctoral Fellowship for Research Abroad.