Research on the Optimization Technology of Mechanical Product Design Plan Based on Fuzzy Comprehensive Evaluation Analysis Method

In the scheme design stage of mechanical products, several design solutions need to be evaluated so that the best design solution can be selected from them. Because the evaluation of mechanical product scheme design is a multilevel, multiattribute and contains many fuzzy models, fuzzy comprehensive evaluation becomes an advantageous model for the evaluation of mechanical product scheme design. In this article, a fuzzy comprehensive evaluation method is constructed, and a combination of the subjectivity of determining weights by hierarchical analysis method and the objectivity of determining weights by entropy value method is used to calculate the weights of evaluation indexes, and a combined assignment method is established to improve the reliability of the evaluation method. Then, the best solution is selected by calculating the comprehensive evaluation value of each product design solution. Finally, the validity, reasonableness, and feasibility of the evaluation model are verified through the evaluation and selection of three design solutions for a gearbox reducer, which also provides a new method for the evaluation and selection of other product design solutions.