Abstract
Abstract
In order to develop proper biodynamic human model of driver of the vehicle, experimental investigations have been performed. Field experiment had aim to give information in which direction oscillatory load of passenger was the highest and in which direction was the lowest. Vehicles, road surface, and speed regime were varied. Obtained results in field experiment were statistically analysed by variance analysis in previously published papers. Conclusions conducted by variance analysis were implemented in laboratory investigation in order to get input data for development of driver´s biodynamic model. Group of thirty male subjects were exposed to two axial broadband random vibrations. Behaviour of driver was analysed by seat to head transfer function. In this paper sensitivity analysis was applied on results obtained in both field and laboratory experiment. Results of sensitivity analysis showed that the highest oscillatory load was in vertical direction and the lowest was in lateral direction. Sensitivity analysis applied on laboratory experimental results showed that human body behaviour under two axial broad band random excitation can not be represented by simply superposition of behaviour under two one axial excitations. Laboratory experimental set up can be simplified excluding measuring point at steering wheel. Model of driver can be represented by model of passenger.
Keywords: vehicle, passenger, ride comfort, oscillatory load, sensitivity function