Abstract：To improve the accuracy of description of equipment performance degradation process, a novel method for performance degradation assessment is proposed, which bases on two techniques: Support Vector Data Description (SVDD) and Dempeter-Shafer theory. SVDD was used to assess the performance according to the data from single sensor, and the performance assessment results based on multi-sensor were sent to D-S theory as input to obtain the assessment result of the whole system. As shown in experience, SVDD can reflect the performance degradation of equipment parts, the results of the equipment given by D-S theory accord with the practical situation, and the algorithms can deal with the evidence conflict problem effectively, which have improved the accuracy and reliability of the assessment results.
2009, Vol. 28 
