Research Article
Remaining Useful Life Prediction for Rotating Machinery Based on Optimal Degradation Indicator
Table 2
Basic parameters of GP.
| | Parameters | Settings |
| | Object | Building the new degradation indicator |
| | Set of terminals | (square root of amplitude), (mean value), (root mean square), (peak value), (waveform index), (impulse index), (margin index), (peak index), (kurtosis index) |
| | Set of functions | +, ā, , /, exp, log, sqrt |
| | Parameters | Population size ā
Evolutionary generation |
| | Probability settings of genetic operator | Crossover probability 0.85
Mutation probability 0.15 |
| | Method of selection | Tournament selection method, the size of tournament is five |
| | Termination criterion | Required maximum of evolutionary generation |
| | Max depth of tree | Six |
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