Obtaining method of high contributing whole body principal component mode by separated measurements

Abstract

In this study, we developed a method for obtaining high contributing whole body vibration behavior to the vehicle interior noise at the running condition by modified operational TPA method (OTPA with PC model). The original OTPA with PC model requires measuring all reference and response points simultaneously. However, if the number of the point is so much, applying this method becomes hard. Hence, the proposed method was made to increase the applicability of this method by realizing to obtain the high contributing whole body vibration behavior without the simultaneous measurement of all points. In the method, several operational tests are repeatedly carried out in each measurement group and high contributing vibration behavior of each group to the response point (interior noise) was obtained as the high contributing partial PC mode. Subsequently, the high contributing whole body PC mode was obtained by integrating the partial PC modes. For obtaining it, relationship between each partial PC and the response point and original phase and amplitude compensation method were utilized. As the result, the high contributing whole body PC mode could be obtained well with much more less measurement points by comparing with the original OTPA with PC model and the applicability of the method was increased.

Excavator driver seat occupational comfort assessment with Lumbar Support Cushion

“…The rms (8) and VDV (8) values on seat and backrest are found to have no correlation in the observation, despite the LSC positively correlated in the vibration dampening effect. In recent studies, PCA is used as well to find correlation in the multivariate data in the field of human comfort and vibration pattern analysis (Huang and Ferguson, 2021; Romano et al, 2020; Yoshida et al, 2018).…”