1. Department of Ultra‐Precision Machines and Systems Korea Institute of Machinery and Materials (KIMM) Daejeon 34103 Republic of Korea
2. School of Mechanical Engineering Chonnam National University Gwangju 61186 Republic of Korea
3. Defense Materials and Components (DMC) Convergence Research Department Electronics and Telecommunications Research Institute (ETRI) Daejeon 34129 Republic of Korea