1. Department of Mechanical Engineering, National Chung Hsing University, 250 Kuo Kuang Road, Taichung 402, Taiwan
2. Department of Automation Engineering, National Formosa University, No. 64 Wenhua Road, Huwei, Yunlin 632, Taiwan
3. Department of Mechanical Engineering, Engineering College, Ocean University of China, 238 Songling Road, Qingdao, China
4. Department of Mechanical and Automation Engineering, Kao Yuan University, No. 1821 Jhongshan Road, Lujhu, Kaohsiung 82151, Taiwan
5. Technical University of Denmark Fotonik, Department of Photonics Engineering, Building 128, Frederiksborgvej 399, 4000 Roskilde, Denmark
6. Department of Mechanical Design Engineering, National Formosa University, No. 64, Wenhua Road, Huwei, Yunlin 632, Taiwan