Table 2 Distribution of difficulty values for various methods from various aspects.

From: Theoretical modeling and fault diagnosis of pantograph–catenary arc under high-speed airflow

Identification method

Arc current

Arc voltage

Arc image

Port impedance

Difficulty in distinguishing between fault and normal signals

2

2

2

1

Difficulty in signal acquisition

1

3

3

1

Algorithm requirements for achieving accuracy of over 90%

2

2

3

1

Requirement for feature value selection with over 90% accuracy

3

3

2

0

Number of required original signal types

1

1

1

2

Performance requirements for processors

2

2

3

1

Total score

11

13

14

6

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