1. School of Mechanical and Aerospace Engineering, College of Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
2. Department of Mechanical Engineering, College of Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand
3. China Aerospace Science and Industry Corporation, Yungang West No. 1, Fengtai, Beijing 100074, China