Agricultural Engineering, Volume 46

SEMI-ACTIVE SUSPENSION INFLUENCE ON COMFORT SENSATION OF A VEHICLE OCCUPANT

Žuraulis Žuraulis, Robertas Pečialiūnas, Ginas Jakutis
Vilnius Gediminas Technical University

Abstract

This article presents an analysis of a modern-day vehicle semi-active suspension performance impact on comfort properties of its occupant. Vehicles chosen for the investigation had two different suspension-driving options, characterized as Comfort and Sport modes. These options change such vehicle parameters as suspension stiffness, algorithm of gearbox operation, and sensitivity of the steering system. Altering these two modes while driving at different speeds and on different road surfaces, vertical accelerations, affecting the occupant seat, were measured. Experiments and data processing were carried out according to ISO 2631-1 standard. After filtering the aforementioned vertical accelerations, the occupant comfort sensation was expressed as the vibration dose value (VDV) and the root mean square (RMS) of vibration acceleration value. Once the fast Fourier transform (FFT) was applied and vertical accelerations were converted to the frequency domain, spectral analysis of accumulated measurements was performed. After evaluating the comfort of an occupant, a summary of the vehicle suspension-driving mode influence is presented.

Keyword(s): Comfort, semi-active suspension, root mean square, vibration dose value, spectral analysis, ISO 2631-1.


References

Barbosa, R. S. 2011. Vehicle Dynamic Safety in Measured Rough Pavement. Journal of Transportation Engineering, 137(5), 305–310.

Eger, T.; Stevenson, J.; Boileauc, P.-É.; Salmoni, A. Predictions of health risks associated with the operation of load-haul-dump mining vehicles: Part 1—Analysis of whole-body vibration exposure using ISO 2631-1 and ISO-2631-5 standards. International Journal of Industrial Ergonomics, 38, 726–738. DOI: 10.1016/j.ergon.2007.08.012.

Guglielmino, E.; Sireteanu, T.; Stammers, C. W.; Ghita, G.; Giuclea, M. 2008. Semi-active Suspension Control – Improved Vehicle Ride and Road Friendliness. London: Springer, 294 p. DOI: 10.1007/978-1-84800-231-9.

ISO 10326-1:1992. Mechanical Vibration – Laboratory Method for Evaluating Vehicle Seat Vibration – Part 1. International Organization for Standardization. Geneva.

ISO 2631-1:1997. Mechanical Vibration and Shock – Evaluation of Human Exposure to Whole Body Vibration – Part 1. International Organization for Standardization. Geneva.

ISO 8608:1995. Mechanical Vibration – Road Surface Profiles – Reporting of Measured Data. International Organization for Standardization. Geneva.

Kertesz, I.; Lovas, T.; Barsi, A. Measurement of road roughness by low-cost photogrammetric system. Commission V, WG V/1.

Mansfield, N. J. 2005. Human Response to Vibrations. CRC Press, 256 p.

Pečeliūnas, R.; Lukoševičienė, O.; Prentkovskis, O. 2003. A mathematical model of the vibrating system equivalent to the vehicle in the mode of emergency braking / Robertas Pečeliūnas. Transport: journal of Vilnius Gediminas Technical University and Lithuanian Academy of Sciences, 18(3), 136–142.

Pečeliūnas, R.; Prentkovskis, O. 2006. Influence of shock-absorber parameters on vehicle vibrations during braking. Solid State Phenomena: Mechatronic Systems and Materials, 113, 235–240.

Rimell, A. N.; Mansfield, N. J. 2007. Design of Digital Filters for Frequency Weightings Required for Risk Assessments of Workers Exposed to Vibration. Industrial Health, 45, 512–519.

Savaresi, S. M.; Poussot-Vassal, C.; Spelta, C.; Sename, O.; Dugard, L. 2010. Semi-Active Suspension Control Design for Vehicles. Elsevier, 206 p.

Sekulić, D.; Dedavić, V.; Rusov, S.; Šalinić, S.; Obradović. 2013. Analysis of vibration effects on the comfort of intercity bus users by oscillatory model with ten degrees of freedom. Applied Mathematical Modelling, 37, 8629–8644. http://dx.doi.org/10.1016/j.apm.2013.03.060.

Stein, G. J.; Chmurny, R.; Rosik, V. 2011. Compact Vibration Measurement System for in-vehicle Applications. Measurement Science Review, 11(5), 154–159.

Thamsuwan O; Blood, R. P.; Ching, R. P.; Boyle, L.; Johnson, P. W. Whole body vibration exposures in bus drivers: A comparison between a high-floor coach and a low-floor city bus. International Journal of Industrial Ergonomics, 43, 9–17. http://dx.doi.org/10.1016/j.ergon.2012.10.003.


Full Text: PDF



DOI: http://dx.doi.org/10.15544/ageng.2014.011

Refbacks

  • There are currently no refbacks.
2463 views

Agricultural Engineering ISSN 1392-1134 / eISSN 2345-0371

This journal is published under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License. Responsible editor: Dr A. Žunda.