*Yuan-Chieh Cheng1, Wei-Jei Peng1, Khaled Abou-El-Hossein2, Pei-Jen Wang3, Po-Kai Chiu1
(1. Instrument Technology Research Center (ITRC) National Applied Research Laboratories (NARLabs), 2. Precision Engineering Laboratory, Nelson Mandela Metropolitan University, 3. Department of Power Mechanical Engineering, National Tsing Hua University)