1. Department of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Gyeonggi-do, Republic of Korea
2. Department of Mechatronics Engineering, Gyeongsang National University, Jinju 52725, Gyeongsangnam-do, Republic of Korea
3. Department of Energy System Engineering, Gyeongsang National University, Jinju 52725, Gyeongsangnam-do, Republic of Korea