Method of estimating clamp force of bolt

A method of estimating clamp force of a bolt may include converting and analyzing, by a signal processing and analyzing device, a learning signal for the clamp force of the bolt, the learning signal being acquired by a data acquirement device; comparing the learning signal classified into groups according to signal characteristics by the converting and analyzing, with a discriminant signal desiredto be estimated; and estimating, as clamp force of the discriminant signal, clamp force corresponding to a signal of a most similar group among the learning signal classified into the groups by the comparing. 一种估算螺栓的夹紧力的方法，包括由信号处理和分析装置转换和分析用于螺栓的夹紧力的学习信号，该学习信号由数据获取装置获取；将转换和分析得到的根据信号特征进行分组的学习信号与期望估算的区分信号进行比较；以及通过比较，将分类为分组的学习信号中与最相似组的信号相对应的夹紧力估算为区分信号的夹紧力。