Table 1 Fault distribution fit test table of the key subsystems
From: Reliability analysis of subway vehicles based on the data of operational failures
Subsystems | Candidate distribution model | P | A-D | Optimal distribution | Parameter |
|---|---|---|---|---|---|
Running gear | Two-parameter Weibull | 0.249 | 0.704 | Two-parameter Weibull | Shape 0.9124 Scale 13.5450 |
Three-parameter Weibull | 0.007 | 1.325 | |||
Exponential | 0.253 | 0.921 | |||
Logarithmic normal | 0.097 | 0.876 | |||
Traction system | Two-parameter Weibull | 0.086 | 1.380 | Two-parameter Weibull | Shape 0.9940 Scale 10.6495 |
Three-parameter Weibull | < 0.005 | 5.463 | |||
Exponential | 0.021 | 1.705 | |||
Logarithmic normal | 0.052 | 1.700 | |||
Brake system | Two-parameter Weibull | 0.014 | 1.120 | Logarithmic normal | Location 2.3693 Scale 1.3003 |
Three-parameter Weibull | 0.224 | 0.657 | |||
Exponential | < 0.003 | 3.376 | |||
Logarithmic normal | 0.236 | 0.644 | |||
Control and diagnostic system | Two-parameter Weibull | 0.242 | 0.672 | Logarithmic normal | Location 2.5573 Scale 1.3581 |
Three-parameter Weibull | 0.123 | 0.796 | |||
Exponential | 0.005 | 2.277 | |||
Logarithmic normal | 0.353 | 0.595 | |||
Auxiliary system | Two-parameter Weibull | 0.096 | 1.974 | Logarithmic normal distribution | Location 1.4915 Scale 0.9349 |
Three-parameter Weibull | <0.005 | 4.060 | |||
Exponential | 0.010 | 2.080 | |||
Logarithmic normal | 0.080 | 1.016 |