This paper describes research concerning the establishment of a correlation between objective and subjective comfort ratings of vehicles traversing rough roads. The absorbed power comfort criterion was used in an amplitude-frequency-distribution format for the objective measure. The objective ratings were then correlated with passenger subjective responses obtained on a city bus traversing 17 distinct road segments. The correlation of absorbed power as an objective ride measure to the subjective evaluation for he bus data was successful. For some individual bus rides, the correlations were poor, but, when a sufficient number of rides were used to give a reasonable sample base, an excellent correlation was obtained and can be expressed mathematically as a logarithmic function. Finally, preliminary correlation of absorbed power with International Standardization Organization standards further enhanced the bus ride and absorbed power correlation numbers since the absorbed powers obtained were of the same order of magnitude for both correlations. Although it would then appear that one could just use International Standardization Organization standards, there is no way to add the effect of multidegrees of freedom. On the other hand, the absorbed power provides a method of adding the effects due to the three major directions plus the pitch and the roll.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 55-63
  • Monograph Title: Pavement surface properties and vehicle interaction
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00141416
  • Record Type: Publication
  • ISBN: 0309024986
  • Report/Paper Numbers: Conf Paper
  • Files: TRIS, TRB
  • Created Date: Nov 3 1976 12:00AM