ABSTRACT
Functional dimensions, such as the thumb tip reach length are not represented accurately by commercial digital manikins, although they are generated from body dimensions. To solve this technical issue, we proposed the functional center of rotation (FCR) of joints instead of anatomical location of joints. The FCR is determined from motion data of joint rotations. It was difficult to generate FCRs for boundary manikins, because boundary manikins are generated from only body dimensions based on large-scale anthropometric database. In this study, both of FCRs of whole body joints and body dimensions were measured for 20 participants. Information of individual variation of FCR locations was compressed by principal component analysis (PCA). The obtained principal components were represented by body dimensions using multiple regression functions. Subsequently, boundary manikins were generated from body dimensions based on Japanese anthropometric database, and their FCR locations were estimated by the multiple regression functions.
