Research On Key Technologies In TRIZ For Multi-Contradiction Oriented Problem

TRIZ (Theory of Inventive Problem Solving) is a kind of generalized theory for product innovation. The design contradiction is the basis of TRIZ defining technical questions, and the product innovation mainly lies in discovering and resolving the contradictions in the design process, which decides the important position of contradiction and its resolution technology in TRIZ. Given TRIZ method in common use, contradiction theory in specific areas facing the pre- and post-processing application problems, this is the bottlenecks of innovation using TRIZ.Addressing the specific issues existed in the practice of contradiction theory of TRIZ, this article focus on the key technologies of TRIZ for multi-contradiction problem oriented, including the contradictions identification and the relationship analysis between contradictions, exploring the implementation methods of domain solution, ultimately forming the design process model of complex contradiction system. The main job is as follows:1. To explore the important methodology in TRIZ, analysis the physical and philosophical connotations of TRIZ methods, determine its methodology establishment foundation—dialectic and similarity theory. On this basis, using Tai-Chi Symbol to establish Idea generation model of innovative design.2. To study determination and analysis methods of design contradictions, set up macroscopic process of definition design contradictions based on the evolution patterns and PRT. According to the design obstacles, set out the concept of design obstacle tree and its mathematical model, establish qualitative and quantitative analysis methods of multi-design contradictions based on the minimal cut set and minimal path set of obstacle tree, so as to determine the status of contradictions in the design system.3. According to the minimal path set of design obstacle tree, explore the best path and solutions for solving the multi-contradiction problem. Set up the two-stage fuzzy comprehensive evaluation method for solution options based on quantitative analysis to the contradictions.4. To study the systematic transformation method of domain solution, analyze the similarity between the thoughts of heredity and variation in Biological engineering and the process of domain solution produced based on CBR,and to establish the generalized gene model of products in basis of similarity theory and the mathematical method of similarity analysis between systems. For finding the exact goal examples most similar to the design problem, by gene cloning of example (Similar reproduction directly), gene recombination, or site-directed mutagenesis (Similarity reasoning reproduction), spontaneous mutation (UXD reproduction), produce new kind of phenotype or genes, to eventually form a complete domain solution.5. Establish product conceptual design model driven by network of contradictions. Set up design contradictions network according to the design obstacle tree. To overcome every contradiction has been seen as the stage goal of product design. To obtain TRIZ solutions to the problems by choosing corresponding TRIZ tools according to the types of contradiction, and change the solutions into the domain solutions. By iterative resolving, the complete concept design schedule would be obtained.6. By application of the conceptual design to the dropping machine, to test design theories and methods mentioned above in the respects of determination and analysis to the contradictions, optimization to the options of solution, transformation to the domain solution, and the formation of product design concepts, etc.