1. College of Mechanical Engineering, Beijing Information Science and Technology University, Beijing, P. R. China
2. Department of Mechanics, Guangxi University, Nanning, P. R. China
3. Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, Tianjin University of Technology, Tianjin, People’s Republic of China
4. Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, P. R. China