Abstract:Space tribology has become one of the key factors that influence the high-precision and long service life in the spacecraft design. Based on the three axioms of the tribology theory, the lubrication problem, fretting tribology behavior coupling phenomenon and triboelectric effect are analyzed in this paper. The corresponding tribology system design requirements are proposed. According to the designing requirements, the design route of the tribology system for spacecraft is established. Through the establishment and management of the tribology system design knowledge database, a tribology system is designed, which is guided by the three axioms of tribology. Most importantly, an expert judgment system is introduced in the solving process, and tribological characteristics including system dependence, time-varying dependence and multidisciplinary and interdisciplinary are considered in the system design.