Fault detection method and system based on adapter tool shank

A fault detection method based on an adapter tool shank, characterized in that, comprising:

• S1:
• obtaining a displacement signal of the adapter tool shank;
• S2:
• based on the displacement signal, determining a feed rate;
• S3:
• based on the feed rate, building a cutting force model;
• S4:
• based on the cutting force model, building a disturbance model;
• S5:
• building an observer model;
• S6:
• based on the disturbance model and the observer model, determining a cutting force error;
• S7:
• based on the observer model, determining a wear rate of the adapter tool shank;
• S8:
• combining the cutting force error and the wear rate to perform fault detection;
• and
• S9:
• based on a fault detection result, judging whether the adapter tool shank has a fault, wherein if yes, a genetic algorithm is used to adjust parameters of the adapter tool shank;
• otherwise, a return is made to step S1;
• wherein the S7 specifically comprises:
• S701:
• building a relationship model between the wear rate and a change rate of a cutting force;
• S702:
• based on the observer model, determining the change rate of the cutting force;
• S703:
• based on the relationship model and the change rate of the cutting force, determining the wear rate of the adapter tool shank.