UIC comfort tests - VTI

This is the preferred result to be used for assessing average comfort on curvaceousroutes.Table12-6 does give a slightly higher correlation, but, using maximum values,representing just 0.1 second from a time zone of 5 minutes, gives too high a riskof introducing erroneous values.12.2 Discussion of the results12.2.1 Preliminary ConclusionThe results of the analysis of average comfort are disappointing, as they showquite low correlation between the passenger comfort votes and any of themeasured parameters, even after the use of a further averaging method. However,this may be explained by the relatively small sample of data that was examined.The Fischer-Snedecor parameter (F Value) has also been listed in all resultstables, which allows for testing the hypothesis that all regression coefficients ineach analysis are zero against the proposed relationship. Despite the very smallcorrelation values, the F coefficient remains acceptable.The chosen relationship to represent the comfort on curvaceous routes is givenbyComfort Note = 0.094* N VA + 0.60* y&& + 0.11*θ & + 0.37* & y&[12.13]where the lateral and roll parameters are the 50 th percentile values, calculatedaccording to the method given in Appendix 1.12.2.2 General quality of the regressionFigure 12-4 Estimated comfort versus votes for average comfort and a curve foraverage of 20 votes.The figure above shows an identical picture as with for local comfort.The scatter is large, but expected for this kind of investigation.The average votes correspond very well with the estimation.VTI notat 56A-2003 107