A novel method for sensitivity analysis and characterization in integrated engineering design

Result: Such novel method, named Specialized PSD, starts from the clarification of the sensitivity analysis problem by defining key parameters, i.e. Design Variables (DVs), Design Parameters (DPs) and Performance Functions (PFs). According to the PSD theory, PF sensitivity is expressed in terms of deviations of DVs and DPs and it is geometrically described by a hyperellipsoid in the n-dimensional space. Sensitivity indexes are then introduced to assess PF variation for different combinations of DVs and DPs deviations. Regression Analysis is adopted to provide the mathematical description of PFs so the PSD theory is finally specialized to be applied in a process sensitivity analysis. Injection molding of a plastic specimen is finally investigated to validate the proposed method.

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