Analyzing And Researching On The Interworking Women's Chinese Costume PCAD System

PCAD (pattern computer aided design) system is the primary characteristic function of clothing CAD system by ensuring the intellectual prosperity rights of Chinese manufacturers. During the recent years, it has landed almost fifty percent portion of the technology market by means of its high adaptability. With the fiercest competition in the clothing market, the function of the traditional CAD system can't meet the enterprises' requirements. Chinese costume is a kind of national art, which has attracted worldwide attention for many years. But for many reasons, it fits for measure-made rather than batch production. Owing to the low efficient and the narrow service scope, the traditional handmade custom can hardly form mass operation, which inhibit the development. To get rid of such situation, the high technology-CAD must be transferred to this area. To accelerate the process of industrialization, this subject researches the women's Chinese costume A-PCAD (auto-PCAD) system.The subject technical routine is: with the example of women' Chinese costume pattern design, analyzing the method of pattern generation automatically, according to the theory of parametric design, setting up ES (expert system) of pattern design by using of ES technology in the field of Al (artificial intelligence). The research includes: at first, on the base of analyzing every kind of pattern design method, according to the theory of pattern design and combining my experience, sum up the change rule of style and its pattern, determine the pattern design rule, finish the knowledge acquisition of pattern design ES. Then, carry out parametric design of pattern according to the theory of constraint-based parametric design, set up the all-dimension constraint, includes value constraint and geometric constraint. After that, finish the knowledge representation, research the constraint solving method, and provide the mathematics model, establish the method base. At last, carry out the A-PCAD system design. The key of the pattern design ES is knowledge acquisition, representation and application, especially the establishment of parametric constraint relationship, realize dimension driven. When the parametric value changes, the pattern changes relatively and cause the change of the style, which ensure the quality of the pattern design ES.The interworking PCAD system provides a software development piattorm to the operator, on the one hand, the operator descripts the style information by the human-computer interaction; on the other hand, computer realizes the pattern design automatically according to the parametric design rules and constraint means, then, the operator carries out the parametric install. In this way, realizing the "particular style, particular dimension" pattern design. At last,the operator can modify the pattern by the modification function. In other words, the difference from the traditional clothing CAD is the operator can focus on the creative design activity rather than plenty of repeated pattern drawing.The interworking PCAD system can increase the efficiency of the pattern design greatly, decrease the specific requirement to the operator, which solve one of the barriers that the traditional clothing CAD system can't be applied widely. Further more, it can carry out another place manufacture and management through the Internet, which accelerate the development of clothing CAD and Chinese costume mass-manufacture process.