Shaping the vibro-isolation properties of horizontal seat suspension

Abstract

In this paper, an effective procedure of shaping the vibro-isolation properties of seat suspension system is presented. The simulation model is created to determine the dependence of evaluation criteria to the design parameters by means of which the system characteristics are formed. The developed optimisation procedure allows to find Pareto-optimal system configuration for the conflicted vibro-isolating criteria, i.e. the frequency weighted transmissibility factor used to evaluate dynamic seat comfort based on acceleration signals and the suspension travel. In order to optimise both the conflicted vibro-isolation criteria, a minimising of the transmissibility factor (primary criterion) is proposed taking into account the suspension travel that is transferred to a non-linear inequality constraint. The correctness of proposed procedure is evaluated using experimental research of the best solution of horizontal seat suspension. This research is performed using the passive system with optimal visco-elastic characteristics, which are selected especially for the welldefined input vibration. The satisfactory agreement of experimental and numerical results is obtained for the analysed vibration reduction system.

Global Sensitivity Analysis of the Vibration Reduction System with Seated Human Body

“…e mathematical models of the basic forces in the system, that is, the spring force F cx1 , the force from end-stop buffers F cx2 , the force of hydraulic shock absorber F dx1 , and the overall friction force of suspension system F dx2 , have been shown in the author's previous paper [17]. In this paper, similar model has been formulated and experimentally verified for the purpose of optimizing the vibroisolation properties of horizontal seat suspension.…”

Experimental attenuation and evaluation of whole body vibration for an off-road vehicle with magnetorheological dampers

“…Values of normalized quality indices J sh;n calculated according to equations (15) and (16) for the passive suspension and Skyhook algorithm are presented in Figure 14. Obviously, lower values of the quality index are desired as they correspond to better vibration mitigation.…”

“…Settings of the vehicle suspension system should be selected in a way which allows for isolation of passengers from unevenness while simultaneously maintaining control over the vehicle as was stated by Els et al 13 Uys et al 14 proposed a method of determining the parameters of vehicle suspension taking into account weighted root mean square vertical acceleration of driver and passenger. Maciejewski et al 15 presented methods for optimization of parameters of horizontal seat suspension and for improvement of dynamic seat comfort and the suspension travel by shaping the suspension's vibro-isolation properties. However, especially demanding cases are those where ride comfort and handling are simultaneously required, e.g.…”

“…Maciejewski et al. 15 presented methods for optimization of parameters of horizontal seat suspension and for improvement of dynamic seat comfort and the suspension travel by shaping the suspension’s vibro-isolation properties. However, especially demanding cases are those where ride comfort and handling are simultaneously required, e.g.…”

Modeling and dynamic analysis of hydraulic damping rubber mount for cab under larger amplitude excitation

“…Related studies have shown that the human body is a complex resonance system, especially sensitive to low frequency vibration [9][10][11][12][13]. When the vibration and shock caused by various excitations of road surface and engine are transmitted to the cab through the frame, it will cause complex vibration coupling characteristics.…”