Abstract
A conduction transformation-based coordination method for product structure optimization design was proposed for the conflict between satisfying product functional requirements and realizing adaptive modification. Customer functional requirements were analyzed hierarchically, the extension domains that indicated the matching degree between customer requirement and product function were delimited; and then a multi-layer function-behavior-structure (FBS) mapping model was established. Product function-structure correlation analysis was carried out in two dimensions, i.e., “structure-structure”, and “structure-function”; a product structure behavior function (SBF) reverse conduction model was constructed based on FBS decomposition model; thus, to realize reverse conduction from structure layer to function layer. For conflict coordination in structure modification, extension transformation operations were created, the conduction transformation trigger unit was extracted, and the trigger condition was also clarified; thus, the coordination strategy for the contradiction in adaptive design could be generated by conducting active and conduction transformations. Finally, the effectiveness and feasibility of this method were verified with the structure optimization design of a delivery system of cutting machine as an example; and the discussion section emphasized that this proposed method used conduction transformation to address design conflict, instead of generating the optimal change propagation path, and how to obtain innovation inspiration.
Highlights
The realization of function is the intention of product design, and it is an important research content in both conceptual design and adaptive design of product [1]
The product use functions and customer expected functional requirements were expressed with extension function domains, the customer requirement matching to product function mechanism was constructed with the extension dependent function, and a multi-layer function-behavior-structure mapping model of product was created
Feature matter-element correlation matrix was constructed with the feature matter-element packages as the nodes of correlation network of product, the correlation between basicelements were expressed quantitatively at the “structure-structure” level; the reverse conduction mechanism from structure layer to function layer was formed by constructing a product structure behavior function reverse conduction model, and the correlation between structure and function was obtained further at the “structure-function” level
Summary
The realization of function is the intention of product design, and it is an important research content in both conceptual design and adaptive design of product [1]. For development of a mechanical product, the function is the main embodiment of the value of the product and is an important reference basis for a customer to select the product. Customer functional requirements have become the main driving factors for the modification of product. The existing product designs in manufacturing industry are mostly adaptive modification designs, in other words, the improvement of function is realized by modification design of structure on the base of the original product; to satisfy the corresponding customer functional requirements [6,7,8]. The essence of product adaptive modification is to realize the innovation of the original design scheme, and design contradictory problem is dealt with through the new provided design scheme. When a certain functional performance is improved, the other related performance is deteriorated
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