1. Department of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, PR China
2. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, PR China
3. Department of Biomedical Engineering, City University of Hong Kong, Hong Kong 999077, PR China
4. Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, PR China
5. State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, PR China