Figure 1.
Health assessment indicators
TABLE I
HEALTH STATUS LEVELS AND DESCRIPTION
| Health grade | grade description |
|---|---|
| health | The measured data are in the range and close to the standard parameter values, don’t require maintenance. |
| good | The measured data are all in the range, and some data are wandering in a small range, but far from the attention value, maintained as planned, Scheduled maintenance. |
| attention | The measured data are all within the range, and most of them swim and fail to reach the attention value. |
| deterioration | The measured data are all within the range, but some data are close to the attention value, which needs to be monitored and repaired as soon as possible. |
| failure | Some data have exceeded the value of attention and must be repaired and secured immediately. |
Figure 2.
Trust function and likelihood function relationship
Figure 3.
Health assessment procedures for equipment
Figure 4.
Half trapezoid normalized quantization function
Figure 5.
Membership function of fuzzy trigonometric functions
Figure 6.
Health condition radar chart of parameters