About the Authors

Lubin Wang

Affiliation College of Mechatronics and Automation, National University of Defense Technology, Changsha, Hunan, China

Longfei Su

Affiliation College of Mechatronics and Automation, National University of Defense Technology, Changsha, Hunan, China

Hui Shen

Affiliation College of Mechatronics and Automation, National University of Defense Technology, Changsha, Hunan, China

Dewen Hu

dwhu@nudt.edu.cn

Affiliation College of Mechatronics and Automation, National University of Defense Technology, Changsha, Hunan, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DH HS. Performed the experiments: LW. Analyzed the data: LW LS. Contributed reagents/materials/analysis tools: LS HS. Wrote the paper: LW.