Modeling and Optimization of Passive Seat Suspension

S. Segla^1, and N. Trišović²

¹Department of Mechanical Engineering, Technical University of Košice, Košice, Slovakia

²Department of Mechanical Engineering, Belgrade University, Belgrade, Serbia

Cite this paper:
S. Segla and N. Trišović. Modeling and Optimization of Passive Seat Suspension. American Journal of Mechanical Engineering. 2013; 1(7):407-411. doi: 10.12691/ajme-1-7-51

Abstract

This paper deals with modeling and optimization of a working machine seat suspension system parameters. Experimental work in the past shown that it is possible to replace even more complicated, for example parallelogram or scissor mechanisms, with simpler dynamic models of 1 or 1.5 degree of freedom (Zener’s model). Optimization of the damper and spring settings is performed using a two-objective function optimization technique. This enables to minimize not only the exerted vertical vibration acceleration of the seat squab, but also the seat squab relative vertical displacement (stroke) in regard to the working machine cabin. The first component of the objective function expresses comfort of the seat, the second one expresses the safe handling of the working machine. This optimization technique enables to propose so called “soft”, “medium”, or “hard” seat suspensions according to the value of the weighting coefficient. The paper also points on the possibility of improving the dynamic characteristics of the seat with the use of a dynamic vibration absorber. The expediency of its application is especially in working machines without significant changes in the seat excitation frequency spectrum.

Keywords:
passive seat suspension comfortoptimization frequency spectrum dynamic vibration absorber

This work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

Figures

References:

[1]	Dupuis, H. et al, Mechanische schwingungen - kentnisstand über beanspruchung, belastung, minderung und richtwerte, Bundes-anstalt für Arbeitsschutz, Dortmund, 1988.
[2]	Griffin, M., Handbook of human vibrations, Academic Press, London, 1994.
[3]	Stein, J.G., Mucka, P., Gunston, T.P. “A study of locomotive dri-ver’s seat vertical suspension system with adjustable damper”, Vehicle System Dynamics, 47 (3). 363-386. May 2009.
[4]	Hostens, I., Deprey, K., Ramon, H. “An improved design of air suspension for seats of mobile agricultural machines”, Journal of Sound and Vibration, 276 (1-2). 141-156. September 2004.
[5]	Maciejewski, I., Meyer, L., Krzyzynski, T. “Modelling and multi-criteria optimisation of passive seat suspension vibro-isolating properties”, Journal of sound and Vibration, 324 (1-2). 520-538. July 2009.
[6]	Nieto, A.J., Morales, A.L., Trapero, J.R., Chicharro, J.M., Pintado, P. “An adaptive pneumatic suspension based on the estimation of the excitation frequency”, Journal of Sound and Vibration, 276 (2). 141-156. January 2004.
[7]	Maciejewski, I. “Control system design of active suspensions”, Journal of Sound and Vibration, 331 (6). 1291-1309. March 2012.
[8]	Maciejewski, I., Meyer, L., Krzyzynski, T. “The vibration damping effectiveness of an active seat suspension system and its robustness to varying mass loading”, Journal of sound and Vibration, 329 (6). 3898-3914. March. 2010.
[9]	He, Y., McPhee, J. “Multidisciplinary design optimization of mechatronic vehicles with active suspensions”, Journal of Sound and Vibration. 283 (1-2). 217-241. May 2005.
[10]	Guglielmino, E. et al, Semi-active Suspension Control, Improved Vehicle Ride and Road Friendliness, Springer, Berlin, 2008.
[11]	Georgiou, G., Verros, G., Natsiavas, S. “Multi-objective optimization of quarter-car models with a passive or semi-active suspension system”, Vehicle System Dynamics, 45 (1). 77-92. January 2007.
[12]	Song, X., Ahmadian, M., Southward, S.C. “Modeling magnetorheological dampers with nonparametric approach”, Journal of Intelligent Material Systems and Structures, 16 (6). 421-432. May 2005.
[13]	Ahmadian, M., Song, X., Southward, S.C. “No-jerk skyhook control methods for semiactive suspensions”, Journal of Vibration and Acoustics, 126 (4). 580-584. October 2004.
[14]	Ballo, I. “Comparison of the properties of active and semi-active suspension”, Vehicle System Dynamics, 47 (3). 363-386. May 2009.
[15]	Optimization Toolbox for use with MATLAB. Users guide, Version 2. The Mathworks Inc., Natick (USA, 2004.
[16]	Cheung, Y.L., Wong, W.O.. “H2 optimization of a non-traditional dynamic absorber for vibration control of structures under random force excitation”, Journal of Sound and Vibration, 330 (6). 1039-1044. March 2011.
[17]	Ji, J.C., Zhang, N. “Suppression of the primary resonance vibrations of a forced nonlinear system using a dynamic vibration absorber”, Journal of Sound and Vibration, 329 (10). 2044-2056. September 2010.