Abstract
At present, many seat functions for railway vehicles have been designed for assuring comfortable sitting posture. However, the priority of those seat functions has not been determined clearly. Moreover, since railway vehicle seats are public artifacts, the existing seat design under diverse conditions results in a low evaluation for the passengers. The objective of this study is to design for railway seat to assure comfortable sitting posture under diverse conditions. Firstly, we used Fuzzy AHP to determine the priority of the seat functions on the diverse subjects' evaluations of them. Secondly, the selected seat functions were optimized by using Robust Design Method for Diverse Conditions. As a result, we found that the forward-tilt function for the seat back and the swing-seat function were the most effective functions to assure comfortable sitting posture. In addition, under diverse conditions, an optimum design solution of relationships between back angle and cushion angle was proposed.
