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Published in:
2012 | OriginalPaper | Chapter
11. TRIZ Separation Principles
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Abstract
Frequently, there is an underlying physical property which is the root cause of the contradiction between the two different parameters as illustrated in the contradiction table. For example, let’s consider the contradiction of wanting to improve “speed” (parameter #14) and seeing a resulting “loss of energy” (parameter #27). There are some very good suggested inventive principles at this intersection such as principle #19, “periodic action” (do we need the speed all the time?), principle #35, “parameter change” (can we store some of the excess energy in a phase change material?), or principle #1“segmentation” (do we need the required speed at all points in the process or machine?), and finally principle #14, “curvature” (can we redesign the body to reduce wind loss?). We need to ask the question, “What is the underlying physical conflict that is causing this loss of power. It might be friction. We want friction to be there at certain times or under certain conditions, but not at other times or under other conditions.