Health State Assessment of Industrial Equipment Driven by the Fusion of Digital Twin Model and Intelligent Algorithm

Table 1

Detailed table of equipment health state grade.

Health state grade	Grade identification	State performance	Definition under digital drive	Maintenance measures
Health	1	Good performance, all indicators are in good condition, suitable for long-term operation.	All indicators are in good condition.	Carry out the daily maintenance.
Subhealth	2	The performance degrades to a certain extent, but it does not affect the normal operation of the equipment.	The failure is almost impossible to occur in the next 30 days.	Carry out the daily maintenance and strengthen condition monitoring.
Attention	3	The performance degradation is serious and can be clearly detected.	Failure may occur in the next 30 days.	Strengthen condition monitoring, prepare for repair, and allocate spare parts in time.
Danger	4	The performance degradation is very serious, which has affected the operation quality of equipment.	Failure may occur in the next 7 days.	Repair at the right time.
Failure	5	A failure has occurred and the function of the equipment has been affected.	Failure has occurred.	Shutdown for repair.