1. School of Mechanical Engineering, Yanshan University, Qinhuangdao, P. R. China
2. Hebei Provincial National Defense Key Discipline Laboratory of General Technology on Military Basic Electromechanical Products, Yanshan University, Qinhuangdao, P. R. China
3. Key Laboratory of Self-Lubricating Spherical Plain Bearing Technology of Hebei Province, Yanshan University, Qinhuangdao, P. R. China
4. Aviation Key Laboratory of Science and Technology on Generic Technology of Self-Lubricating Spherical Plain Bearing, Yanshan University, Qinhuangdao, P. R. China
5. Aviation Industry Corporation of Shenyang Aircraft Design and Research Institute, Shenyang, P. R. China