1. School of Automation, Central South University, 12570 Changsha, Hunan, China, 410083 (e-mail: chenglong_du@csu.edu.cn)
2. Central South University, 12570 Changsha, Hunan, China, 410083 (e-mail: fanbiaoli@csu.edu.cn)
3. Central South University, Changsha, Hunan, China, 410083 (e-mail: ychh@csu.edu.cn)
4. Dept. of Mechanical Engineering, University of Victoria, Victoria, British Columbia, Canada, V8W 3P1 (e-mail: yshi@uvic.ca)
5. Central South University, 12570 Changsha, Hunan, China, 410083 (e-mail: zdh-dqkz@csu.edu.cn)
6. Central South University, 12570 Changsha, Hunan, China, 410083 (e-mail: gwh@csu.edu.cn)