Abstract: Uncertain factors exist in every design step, which makes the design process of complex products more and more complicated. It is necessary to correctly understand and master various uncertainty phenomena in the intelligent design process of complex products. The types and characteristics of different uncertainty factors in product design are systematically sorted out. Focusing on the process promotion of uncertain intelligent design, its research status and application scenarios are analyzed from four aspects: uncertain intelligent analysis of customer demand, uncertain intelligent solution of functional structure, uncertain intelligent decision-making of design scheme and uncertain intelligent optimization of local parameter. In view of the existing problems in current uncertain intelligent design, such as the design intention is difficult to extract under strong fuzzy redundancy, the functional behavior is difficult to reason under incomplete trust, the design scheme is difficult to decide under incomplete interval, and the structural performance is difficult to predict under mixed uncertainties, the future research directions of uncertain intelligent design for complex products are proposed.

Key words: complex product, uncertain intelligent design, customer demand analysis, functional structure solution, design scheme decision-making, local parameter optimization