Abstract
A simulation study using an active vibration control system (AVCS) is conducted to reduce the vibration responses of UH-60A helicopter airframe and human body on a pilot seat in both low-and high-speed flights (μ = 0.15 and μ = 0.37). The 4P hub vibratory loads of the UH-60A helicopter are calculated using DYMORE II, a nonlinear multibody dynamics analysis code, and MSC. NASTRAN is used to predict the vibration responses of the UH-60A airframe and human body. MATLAB Simulink is used to construct the AVCS framework using seven accelerometers and five force generators. The AVCS in this study uses Fx-LMS algorithm to determine vibration-cancellation forces. When applying the AVCS to the UH-60A helicopter, the 4P airframe vibration response reductions at low-and high-speed flight conditions are 22.05 % to 97.83 % and 25.05 % to 91.81 %, respectively. The vibration responses of the human body are reduced from 89.29 % to 90.16 % and 61.23 % to 72.43 % at low-and highspeed flight conditions, respectively.
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Acknowledgments
This study was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2020R1I1A3071793). This study was supported by the Basic Science Research Program funded by the Ministry of Science and ICT (2021R1A5A 1031868). Part of this paper was presented at the 2021 Korean Society for Aeronautical and Space Sciences Fall conference, Korea, Samcheok, November 11–19, 2021.
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Jae-Sang Park received Ph.D. degree in Mechanical and Aerospace Engineering, from Seoul National University, Seoul, Korea in 2006. From 2006 to 2007, he worked as a post doctor at Flight Vehicle Research Center, Seoul National University. From 2008 to 2013, he worked as a Research Professor at Konkuk University, Seoul, Korea. Dr. Park is currently an Associate Professor, Department of Aerospace engineering, Chungnam National University, Daejeon, Korea. His research interests include aerospace structural analyses and rotorcraft aeromechanics analyses.
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Park, BH., Bang, SW., Lee, YL. et al. Active vibration reductions for airframe and human body of UH-60A helicopter in low- and high-speed flights. J Mech Sci Technol 36, 5363–5373 (2022). https://doi.org/10.1007/s12206-022-1003-z
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DOI: https://doi.org/10.1007/s12206-022-1003-z