1. State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing, P.R. China
2. School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, Singapore
3. Department of Mechanics, Huazhong University of Science and Technology, Wuhan, Hubei Province, P.R. China