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Design and Fabrication of Seat Suspension System Using Quasi-Zero Stiffness System

Mostafizur Rahman Rasel, Md. Arafat Rahman, Md. Mehdi Masud Tadukder

Abstract


Performance of conventional vibration isolation systems is confined by stiffness of mount required to support weight of payload. This limitation traces phenomenon of Quasi-Zero Stiffness (QZS) system, which results in high static stiffness to support weight of payload and low dynamic stiffness to obtain larger vibration isolation bandwidth. This paper represents how natural frequency and vibration transmissibility of a suspension system can be reduced by adding negative stiffness system (NSS) with main system. Passive QZS system can be configured in parallel arrangement of positive stiffness element and negative stiffness element.  Mathematical formulations of suspension system are obtained by using potential energy method. A conventional mass-spring of stiffness (4500 N/m) suspension system was modeled with natural frequency of 2.39 Hz. Natural frequency is reduced to 1.78 Hz by adding single NSS of stiffness 2000 N/m, and then to 0.80 Hz by using double NSS of stiffness 2000 N/m. In addition, natural frequency of 2.55 Hz has been obtained for no NSS, 1.88 Hz for single NSS and 0.87 Hz for double NSS from experimental results. It is noted that non-linearity problem, unbalancing in dynamic condition and improper machining of the parts used in assembling of final model are caused of variation in simulation and experimental results. Modified passive seat suspension consists of commercial coil springs and mechanical linkage system, and therefore will be cost-effective, energy efficient, and has the potentiality of larger vibration attenuation bandwidth.


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References


P. S. Tae and S. C. Banik, “Design of a Vehicle Suspension System with Negative Stiffness System,” IST Trans. Mech. Sys. - Theory Appl., vol. 1, no. 1, pp. 6–12, 2010.

T. D. Le and K. K. Ahn, “A vibration isolation system in low frequency excitation region using negative stiffness structure for vehicle seat,” J. Sound Vib., vol. 330, no. 26, pp. 6311–6335, 2011.

S. T. Park and T. T. Luu, “A new method for reducing the natural frequency of single degree of freedom systems,” J. Sound Vib., vol. 300, no. 1–2, pp. 422–428, 2007.

A. Rahman, B. Salam, and T. Islam, “An Improved Design of Anti Vibration Mount for lower Natural Frequency,” 2010.

S. E. E. Profile, “IMEC & APM-ABS-AM-07 A Study On Vibration Control By Using Imec & Apm-Abs-Am-07 A Study On Vibration Control By Using Passive High,” no. August, pp. 3–9, 2014.

D. Ning, S. Sun, J. Zhang, H. Du, W. Li, and X. Wang, “An active seat suspension design for vibration control of heavy-duty vehicles,” J. Low Freq. Noise, Vib. Act. Control, vol. 35, no. 4, pp. 264–278, 2016.

S. A. Adam and N. A. A. Jalil, “Vertical Suspension Seat Transmissibility and SEAT Values for Seated Person Exposed to Whole-body Vibration in Agricultural Tractor Preliminary Study,” Procedia Eng., vol. 170, pp. 435–442, 2017.

H. Hall, S. Loghavi, R. Singh, and S. Noll, “Analysis of Negative Stiffness Devices with Application to Vehicle Seat Suspensions,” no. April, 2015.

L. Kashdan, D. C. Seepersad, D. M. Haberman, and D. P. S. Wilson, “Kashdan_Paper11_FINAL important,” p. 16.

L. Meng, J. Sun, and W. Wu, “Theoretical Design and Characteristics Analysis of a Quasi-Zero Stiffness Isolator Using a Disk Spring as Negative Stiffness Element,” Shock Vib., vol. 2015, pp. 1–19, 2015.

E. Palomares, A. J. Nieto, A. L. Morales, J. M. Chicharro, and P. Pintado, “Numerical and experimental analysis of a vibration isolator equipped with a negative stiffness system,” J. Sound Vib., vol. 414, pp. 31–42, 2017.

B. Das, “ICMERE 2011-PI-149 Design Of A Driver Seat Suspension System For Better,” vol. 2011, no. December, pp. 22–24, 2011.

L. T. Danh and K. K. Ahn, “Active pneumatic vibration isolation system using negative stiffness structures for a vehicle seat,” J. Sound Vib., vol. 333, no. 5, pp. 1245–1268, 2014.

T. Mizuno, M. Takasaki, D. Kishita, and K. Hirakawa, “Vibration isolation system combining zero-power magnetic suspension with springs,” Control Eng. Pract., vol. 15, no. 2, pp. 187–196, 2007.

W. S. Robertson, M. R. F. Kidner, B. S. Cazzolato, and A. C. Zander, “Theoretical design parameters for a quasi-zero stiffness magnetic spring for vibration isolation,” J. Sound Vib., vol. 326, no. 1–2, pp. 88–103, 2009.


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