Abstract
We propose the quasi-zero-stiffness (QZS) vibration isolator as seat suspension to improve vehicle vibration isolation performance. The QZS vibration isolator is composed of vertical spring and two symmetric negative stiffness structures used as stiffness correctors. A vehicle-seat-human coupled model considering the QZS vibration isolator is established as a three degree-of-freedom (DOF) model; it is composed of a quarter car model and a simplified 1 DOF model combined vehicle seat and human body. This model considers the changing mass of the passengers and sets the total mass of the vehicle seat and human body as an uncertain parameter, which investigates the overload and unload conditions in practical engineering. To further improve the vehicle ride comfort, a constrained adaptive backstepping controller law based on the barrier Lyapunov function (BLF) is presented. The dynamic characteristic of the active vehicle-seathuman coupled model under shock excitation was analyzed using numerical method. The results show that the designed controller law can isolate the shock excitation transmitted from the road to the passengers effectively, and both the vehicle and seat suspension strokes remain in the allowed stroke range.
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Yong Wang received the B.S. in Traffic and Transportation Engineering from Nanjing Forestry University, Nanjing, China, in 2010, and the Ph.D. in Vehicle Engineering from Nanjing University of Aeronautics and Astronautics, Nanjing, China, in 2016. He is a Lecturer at the Automotive Engineering Research Institute, Jiangsu University, Zhenjiang, China. His research interests include vehicle vibration analysis and control, nonlinear dynamics analysis and control.
Shunming Li received the Ph.D. in Mechanics from Xi’an Jiaotong University, Xi’an, China, in 1988. He is a Professor at the College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China. His current research interests include noise and vibration analysis and control, signal processing, machine fault diagnosis, sensing and measurement technology.
Chun Cheng received the B.S. and Ph.D. in Vehicle Engineering from Nanjing University of Aeronautics and Astronautics, Nanjing, China, in 2013 and 2017. He is a Lecturer at the School of Mechatronic Engineering, Jiangsu Normal University, Xuzhou, China. His current research interests include vibration analysis and control.
Yuqing Su received the B.S. and M.S. in Vehicle Engineering from Nanjing University of Aeronautics and Astronautics, Nanjing, China, in 2013 and 2017. He is an Engineer at the Pan Asia Technical Automotive Center Co., Ltd. His research interests include vehicle dynamics analysis.
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Wang, Y., Li, S., Cheng, C. et al. Adaptive control of a vehicle-seat-human coupled model using quasi-zero-stiffness vibration isolator as seat suspension. J Mech Sci Technol 32, 2973–2985 (2018). https://doi.org/10.1007/s12206-018-0601-2
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DOI: https://doi.org/10.1007/s12206-018-0601-2