Research Article
Feature Extraction and Selection Scheme for Intelligent Engine Fault Diagnosis Based on 2DNMF, Mutual Information, and NSGA-II
Table 1
Engine operating states in experiment.
| | State code | Engine operating condition |
| | 1 | Normal state | | 2 | First cylinder misfire | | 3 | Second cylinder misfire | | 4 | First and second cylinder misfires | | 5 | Too large clearance of intake valve | | 6 | Too large clearance of exhaust valve | | 7 | Air leakage of the intake valve | | 8 | Air leakage of the exhaust valve |
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