Method for automatically updating clutch database

The invention relates to a method for automatically updating a clutch database. The method comprises the following steps: firstly, determining information of parts and parameters influencing the performance of a clutch to form an influence parameter set; determining a corresponding weight for each element to form a weight set corresponding to the influence parameter set, in order to reflect the important degree of each element due to the fact that elements in the influence parameter set have different influence degrees to the clutch designing quality; calculating the degree of membership of the elements of the influence parameter set by adopting a Cauchy distribution membership function and constructing a fuzzy relationship matrix; and performing compositional operation performed by use of the influence parameter set, the fuzzy relationship matrix and the weight set so as to obtain a comprehensive evaluation value, and typing the design data into a database if the design data accords with requirements, otherw