Journal of Advanced Mechanical Design, Systems, and Manufacturing
Online ISSN : 1881-3054
ISSN-L : 1881-3054
Papers(Special Issue)
Efficient product design using functional equations
Shingo YAMAGUCHIHiroshi MORITA
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ジャーナル フリー

2018 年 12 巻 6 号 p. JAMDSM0114

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We discuss an approach to represent product functions mathematically and derive functional equations as a means to improve product design efficiency. Product design proceeds in a set order: clarification of task and target, concept design, entity design, and detailed design. Concept design belongs to the upstream stage of product design, and consists of procedures to develop the functional structure of the product and create design solutions to realize that functional structure. Many of today’s products are complicated, large-scale systems that combine subsystems from different technology fields. The functional structures of these products are typically developed and design solutions created in concept design. Subsystem engineers then iteratively adjust subsystem design parameters in entity design and detailed design. Finally, efforts are made to realize the function and performance of the product. In the process, the design can change significantly in entity design and detailed design, and there is often a remand in concept design. By formulating product functions mathematically and evaluating the stability and the degree to which the target is achieved, we can predict product optimality in the upstream stage of product design. In this way, the likelihood of redesign in the midstream and downstream stage of product design or of returning to the upstream stage of product design will be reduced. In the design and manufacturing field, the concept of product function has a number of variations. After examining the various alternatives, we focus on generic function of quality engineering as most suitable for formulating product functions and use it to develop our approach, applying it to a combined system composed of different technical fields. We then confirm that the approach is effective in improving product design efficiency.

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© 2018 by The Japan Society of Mechanical Engineers
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