Shock and Vibration / 2017 / Article / Tab 2

Research Article

Remaining Useful Life Prediction for Rotating Machinery Based on Optimal Degradation Indicator

Table 2

Basic parameters of GP.


ObjectBuilding 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+, −, , /, exp, log, sqrt

ParametersPopulation size
Evolutionary generation

Probability settings of genetic operatorCrossover probability 0.85
Mutation probability 0.15

Method of selectionTournament selection method, the size of tournament is five

Termination criterionRequired maximum of evolutionary generation

Max depth of treeSix

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