Abstract: In order to solve the problems of high functional complexity of product systems and tedious conflict solving processes, the strategies for simplifying and solving multi-conflict networks were investigated herein. Firstly, the conflicts were described by using the extensible basic element models, and a multi-conflict network was constructed by using the causal analysis methods based on functional models. In order to identify key conflicts the techniques for order preference by similarity to ideal solution（TOPSIS）methods were applied to establish a comprehensive evaluation system from the perspectives of the topological characteristics of conflicts in the network and the degree of customer requirements. Secondly, a method for decomposing key sub-conflict networks was proposed to extract conflicts related to key conflicts and form sub-conflict networks. Finally, a set of rules for simplifying multi-conflict networks was proposed, which utilized extensible transformations to eliminate the relationships between conflicts. The simplified sub-conflict networks were then integrated, and the TRIZ tool was used to solve the key conflicts, so as to put forward a strategy for simplifying and solving multi-conflict networks. The feasibility and effectiveness of this strategy were demonstrated through the analysis of an intelligent stair-climbing wheelchair as an example.

Key words:  , multi-conflict network, theory of inventive problem solving(TRIZ), extension transformation, stair-climbing wheelchair

摘要： 针对因产品系统功能复杂程度高而导致的多冲突网络求解过程繁琐的问题，研究了多冲突网的简化与求解策略。首先，通过可拓基元模型对冲突进行描述，结合基于功能模型的因果分析法构建多冲突网络，从冲突在网络中的拓扑特性和客户需求程度两个方面应用优劣解距离法（TOPSIS）构建综合评价体系，挖掘网络中的关键冲突。然后，提出了关键子冲突网络的拆解方法，将与关键冲突相关的冲突提取出来形成子冲突网。最后，提出了多冲突网简化规则，通过可拓变换对冲突间相关关系进行解除，将简化后的子冲突网进行整合，运用TRIZ工具对关键冲突进行求解，从而提出了多冲突网简化与求解策略。以爬楼轮椅为实例进行分析，验证了该策略的可行性和有效性。

关键词: 多冲突网, 发明问题解决理论, 可拓变换, 爬楼轮椅