in the studying process of fault prediction method during operating numerical control (NC) machine tool, using the current algorithm to predict fault in the running process of the NC machine tool, iteration is easy to fall into the local extremum problem. Therefore, a new method of fault prediction based on the improved firefly algorithm for NC machine tool is proposed. First, the firefly algorithm is used to analyze the running process of a NC machine tool, and NC machine tool fault diagnosis model is established. Then, the background value optimization and NC machine tool fault diagnosis model are combined and applied in NC machine tools fault prediction, in the predicting process, the effect of background value and initial conditions on the fault prediction accuracy of the operation process of the NC machine tool, using iterative process to update the original data, and the particle swarm optimization algorithm is fused to optimize the background value of each iteration, in the end, NC machine tool fault prediction can be completed effectively. The simulation results prove that the method of fault prediction of the NC machine tool based on the improved firefly algorithm has high accuracy and robustness.
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