Forecasting Conditions of Reactor Coolant Pump Based on Support Vector Machine

In the traditional fault diagnosis technology, classical life and reliability tests require sufficient sample size when diagnose the faults and forecast the future states. However, there is even less sample size for machinery products, especially for major equipment. The support vector machine based on statistical learning theory can solve this problem. In this paper, a forecast model for reactor coolant pump which combines LSSVM (least squares support vector machine) and time series model is constructed. We studied the impact to forecast accuracy which caused by embedding dimension M, kernel function sigma and regularization parameter gamma. Meanwhile, the performance of LSSVM is verified by simulation data and field data. Then LSSVM is used to predict vibration signals of reactor coolant pump. As it is certified that the forecast data could match the actual data preferably and has achieved good results in forecasting field data.