[Ruan, X. X.; Fang, T.; Huang, Z. L.; Jiang, C.; Wang, Z. H.] Hunan Univ, Coll Mech & Vehicle Engn, State Key Lab Adv Design & Mfg Vehicle Body, Changsha, Hunan, Peoples R China.
[Zhang, Y. Q.] Natl Def Key Lab Antennas & Microwave Technol, Nanjing 210039, Jiangsu, Peoples R China.
[Huang, Z. L.] Hunan City Univ, Sch Mech & Elect Engn, Yiyang City 413002, Peoples R China.
[Wang, C. S.] Xidian Univ, Sch Electromech Engn, Key Lab Elect Equipment Struct Design, Minist Educ, Xian 710071, Shaanxi, Peoples R China.