1. College of Mechanical Engineering;
2. State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 40044, Chinae-mail: zhibo_geng@cqu.edu.cn
3. State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 40044, Chinae-mail: xiaoke993@cqu.edu.cn
4. State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 40044, Chinae-mail: jxwang@cqu.edu.cn
5. State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 40044, Chinae-mail: lijunyang1982@sina.com