Research on active knowledge assistant system oriented mechanical design processes

According to the problems of knowledge use in design processes,this paper proposes a design assistance system that can assist designer use knowledge quickly by human- computer?interactive method,a case study to power cabin of tank design is given.Based on knowledge acquire flow of design processes by using function model,design knowledge is acquired.According to the rule of using knowledge,mechanism of knowledge storing and output is established.Knowledge perceiving is used to establish the evaluation of the user' s knowledge structure to a design task.The system can offer active assistance by using evaluation.