Abstract: In tribology design system, a new neural network-based synthetical evaluation model is proposed, which takes system engineering thought of tribology system as guide and considers comprehensively requisition of tribology design. It is applied to tribology design of bearing-rotor system. Practice have proved that evaluating results of this model are accuracy and reasonable.

Key words: Design, Neural network, Synthetical evaluation, Tribology, mixing, numerical simulation, sectional profiles, twin rotors in differential screw coupling, united geometrical design