Method monitoring and diagnosing equipment failure through component characteristic frequency multiplication amplitude trend

The invention discloses a method monitoring and diagnosing equipment failure through a component characteristic frequency multiplication amplitude trend. According to the method, component failure characteristic frequency multiplication amplitude is extracted from all original data and stored in corresponding databases, a corresponding characteristic frequency multiplication amplitude trend chart is drawn through the information stored in the databases, and the equipment failure can be monitored and diagnosed by mastering the amplitude change trend of failure characteristic frequency multiplication. In addition, through the method, storing and calling a great amount of the original data are avoided, a single parameter (a certain frequency multiplication value) can be monitored and analyzed quantificationally, and therefore the amplitude change trend of frequency multiplication of a certain characteristic of each component can be learnt visually, and the accuracy rate of equipment failure diagnosis and the wor