Study on digital design system of complex products

For the intelligent design of complex products,complex products, in accordance with its features, are decomposed into traditional structures and innovative structures. By different structure features of different products, adopts the method of the case-based reasoning and the knowledge rule base constraint, and realize intelligent design. Application results show that the method not only inherits the advantages of the traditional intelligent design, but also to overcome it´s deficiencies of reliance on case-based reasoning. It improves the design efficiency and meet different design requirements.