| In recent years, more and more research has been focused on how to use TRIZmethodology to generate new ideas at the stage of conceptual design. There are two reasons.Firstly, TRIZ contains abundant problem solving tools, including knowledge base, effect base,contradiction matrix,40principles and so on, which is capability of dealing with themultiform, complex conceptual design problems. Secondly, the knowledge recommended byTRIZ to solve the problem is not lean to any science or industrial field, which is propitious togenerate new ideas due to the avoidance of thinking set. However, it is complex and abstrusefor TRIZ beginner to learn. My job is focused on conceptual design process and the keytechnique, including function design, diagnose of solutions and solution’s evolution. The aimis to integrate TRIZ tools to support the process of conceptual design mentioned above. Themain jobs are as follows:(1) In order to create conceptual design process which is capabililty of supportingtechnical system’s evolution, the key problems affecting the technical system’s evolution arefound, they are functional problem and the relationship problem between technical systemand environment. Therefore, affordance is extended to express the knowledge structure ofconceptual design companying with function, behavior and structure. Situated design processis studied to find the driving force for innovation under the supporting of knowledge frommulti-field. Based on jobs above, a conceptual design process model which supportedintegrating application the kinds of TRIZ tools is formed. The model is U-FES (Unexpecteddiscovery function effect structure).(2) To explore the techniques supporting the key steps of U-FES model, we studied thekey techniques including function formulization, function decomposed and mapping ofanalogy. And use the expression of verb-noun-flow to formulize function semantic expression.Furthermore, the structure of TRIZ’s function-effect catalog is modified, and explored thefunction ontology structure based on the TRIZ’s function vocabulary to support the techniquementioned above. The structure of effect database and effect example database are established.Based on the jobs above, the technique which support the mapping from function semantemeto effect’s example is built.(3) Situational analogy is introduced to support functional problem solving andsolution’s diagnosing. And UXD process based on the situated FBS representation is appliedto drive the new idea generating, which overcome the difficult of analogy between the objectsfrom different domain. Furthermore, A-representation is putted forward to support the UXDprocess to aid the diagnosing process, which is helpful to find the problem at the early stage of conceptual design.(4) To study the concept ideality, and introduce a new expression of ideality based onaffordance, which is helpful when designer aims to find the main factors exactly whichprevent the evolution of artifact. The proposal expression of ideality links the environmentfactors to the ideality of artifact.(5) To select the main contradictions from contradictions’ set which are composed of thedesign contradictions preventing the evolution of artifact seriously, the concept importanceand influence is introduced, and the equation of importance and influence is established,which provide a quantifying method for main contradictions’ selection.(6) To explore the conceptual design process model based on situated design, and theflow chart of conceptual design is established based on U-FES model, which is supported byhuman-computer cooperation process. The proposal conceptual design process is verified bythe evolution of electro-haulage shearer screw drum. |
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