Affiliation: | 1. Department of Mechanical Engineering, Graduate School of Engineering , Osaka Prefecture University , Nakaku, Sakai, Japan ootao@me.osakafu-u.ac.jp;3. Department of Mechanical Engineering, Graduate School of Engineering , Osaka Prefecture University , Nakaku, Sakai, Japan;4. Fuji Heavy Industries Ltd. , Tokyo Office, Osawa , Mataka, Tokyo, Japan |