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Abstract
In this paper, an active pneumatic vibration isolation system using negative stiffness structures (NSS) for a vehicle seat in low excitation frequencies is proposed, the negative stiffness structures (NSS) are used to minimize the vibratory attraction of a vehicle seat. Thus, an adaptive intelligent back stepping controller (AIBC) is designed to manage the system operation for high-isolation effectiveness. In addition, an auxiliary control effort is also introduced to eliminate the effect of the unpredictable perturbations. Moreover, a radial basis function neural network (RBFNN) model is utilized to estimate the optimal gain of the auxiliary control effort.
The vibration isolator using a novel magnetic spring with negative stiffness (MS-NS) is proposed in this paper. The proposed isolator which combines a positive stiffness spring with the MS-NS in parallel possesses the characteristic of high-static–low-dynamic stiffness. The MS-NS is composed of three cuboidal magnets configured inrepulsive interaction. Ananalytical expression of the stiffness of the MS-NS is derived by using the magnetic charge model, and the approximation to the exact analytical expression is sought. Then, the nonlinearity of the stiffness Is analyzed, and it is shown that the MS-NS is approximately linear for small oscillations.##plugins.themes.academic_pro.article.details##
How to Cite
Ganesh Bhalerao, A. V. H. T. B. S. (2015). Negative Stiffness Structure for a Vehicle seat. International Journal of Emerging Trends in Science and Technology, 2(05). Retrieved from https://igmpublication.org/ijetst.in/index.php/ijetst/article/view/678
References
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5. R.H. Plaut, H.M.Favor, A.E.Jeffers, L.N.Virgin, Vibration isolation using buckled or prebent columns- part1: two-dimensional motion of horizontal rigid bar, Journal of Sound and Vibration 310 (1–2) (2008) 409–420
6. I. Hostens, K.Deprez, H.Ramon, An improved design of air suspension for seats of mobile agriculture machines, Journal of Sound and Vibration 276(1–2) (2004)141–156.
7. N.F.duPlooy,P.s.Heyns,M.J.Brennan,Thedevelopmentofatunablevibrationabsorbingisolator, International Journal of Mechanical Sciences 47(7) (2005)983–997.
8. A.Carrella, M.J.Brennan, T.P.Waters, Static analysis of a passive vibration isolation with quasizero- stiffness characteristic, Journal of Sound and Vibration 301(3–5) (2007)678–698.
9. A.Carrella, M.J.Brennan,T.P.Waters,K.Shin,Onthedesignofa high-static-low-dynamic stiffness isolator using linear mechanical springs and magnets, Journal of Sound and Vibration 315(3) (2008)712 –720.
10. C.-M. Lee, A multistage high speed rail road vibration isolation system with “negative†stiffness, Journal of Sound and Vibration 331(4)(2012)914–921.
11. C.G. Gordon, Generic vibration criteria for vibration-sensitive equipment, Proceedings of SPIE, SanJose, CA,1999
12. E.H Anderson, B. Houghton, ELITE-3 active vibration isolation workstation, Proceedings of SPIE, 2001, pp.183–196.
13. Y. -H. Shin, K. -J. Kim, Performance enhancement of pneumatic vibration isolation tables in low frequency range by time delay control, Journal of Sound and Vibration 321(2009)537–553.
14. B. Yan, M.J .Brennan, S.J. Elliott, N.S. Ferguson, Active vibration isolation of a system with a distributed parameter isolator using absolute velocity feedback control, Journal of Sound and Vibration 329 (2010)1601–1614
15. M.Y asuda, T. Osaka, M. Ikeda, Feed forward control of a vibration isolation system for disturbance suppression, Proceedings of the 35th IEEE Decision and Control, IEEE,1996,pp.1229–1233.
16. T.H. Yan, H.Y. Pu, X.D. Chen, Q.Li, C.Xu, Integrated hybrid vibration isolator with feed forward compensation for fast high-precision positioning X/ Y tables, Measurement Science and Technology 21 (2010) 065901.
17. A.Carrella, M.J.Brennan, T.P.Waters, K.Shin, On the design of a high-static–low-dynamic stiffness isolator using linear mechanical springs and magnets, Journal of Sound and Vibration 315(2008)712–720.
18. L. Virgin, S.Santillan, R.Plaut, Vibration isolation using extreme geometric nonlinearity, Journal of Sound and Vibration 315(2008)721–731
19. D. L. Platus, Negative-stiffness-mechanism vibration isolation systems, Proceedings of SPIE, 1991, pp. 44–54.
2. L.N. Virgin, S.T. Santillan, R.H. Plaut, Vibration isolation using extreme geometric nonlinearity, Journal of Sound and Vibration 315(3)(2008)721–731
3. S. Santillan, L.N.Virgin, R.H.Plaut, Equilibria and vibration of a heavy pinched loop, Journal of Sound and Vibration 288 (1–2) (2005)81–90.
4. E.J. Chnin, K.T. Lee, J. Winter flood, L.Ju, D.G.Blair, Low frequency vertical geome-tric anti-spring vibration isolators, Physics Letters A 336(2–3) (2005) 97–105.
5. R.H. Plaut, H.M.Favor, A.E.Jeffers, L.N.Virgin, Vibration isolation using buckled or prebent columns- part1: two-dimensional motion of horizontal rigid bar, Journal of Sound and Vibration 310 (1–2) (2008) 409–420
6. I. Hostens, K.Deprez, H.Ramon, An improved design of air suspension for seats of mobile agriculture machines, Journal of Sound and Vibration 276(1–2) (2004)141–156.
7. N.F.duPlooy,P.s.Heyns,M.J.Brennan,Thedevelopmentofatunablevibrationabsorbingisolator, International Journal of Mechanical Sciences 47(7) (2005)983–997.
8. A.Carrella, M.J.Brennan, T.P.Waters, Static analysis of a passive vibration isolation with quasizero- stiffness characteristic, Journal of Sound and Vibration 301(3–5) (2007)678–698.
9. A.Carrella, M.J.Brennan,T.P.Waters,K.Shin,Onthedesignofa high-static-low-dynamic stiffness isolator using linear mechanical springs and magnets, Journal of Sound and Vibration 315(3) (2008)712 –720.
10. C.-M. Lee, A multistage high speed rail road vibration isolation system with “negative†stiffness, Journal of Sound and Vibration 331(4)(2012)914–921.
11. C.G. Gordon, Generic vibration criteria for vibration-sensitive equipment, Proceedings of SPIE, SanJose, CA,1999
12. E.H Anderson, B. Houghton, ELITE-3 active vibration isolation workstation, Proceedings of SPIE, 2001, pp.183–196.
13. Y. -H. Shin, K. -J. Kim, Performance enhancement of pneumatic vibration isolation tables in low frequency range by time delay control, Journal of Sound and Vibration 321(2009)537–553.
14. B. Yan, M.J .Brennan, S.J. Elliott, N.S. Ferguson, Active vibration isolation of a system with a distributed parameter isolator using absolute velocity feedback control, Journal of Sound and Vibration 329 (2010)1601–1614
15. M.Y asuda, T. Osaka, M. Ikeda, Feed forward control of a vibration isolation system for disturbance suppression, Proceedings of the 35th IEEE Decision and Control, IEEE,1996,pp.1229–1233.
16. T.H. Yan, H.Y. Pu, X.D. Chen, Q.Li, C.Xu, Integrated hybrid vibration isolator with feed forward compensation for fast high-precision positioning X/ Y tables, Measurement Science and Technology 21 (2010) 065901.
17. A.Carrella, M.J.Brennan, T.P.Waters, K.Shin, On the design of a high-static–low-dynamic stiffness isolator using linear mechanical springs and magnets, Journal of Sound and Vibration 315(2008)712–720.
18. L. Virgin, S.Santillan, R.Plaut, Vibration isolation using extreme geometric nonlinearity, Journal of Sound and Vibration 315(2008)721–731
19. D. L. Platus, Negative-stiffness-mechanism vibration isolation systems, Proceedings of SPIE, 1991, pp. 44–54.