Equipment performance degradation assessment based on SVDD and information fusion technology

To improve the accuracy of description of equipment performance degradation process,a novel method for performance degradation assessment was proposed,it was based on two techniques: support vector data description (SVDD) and dempeter-shafer(D-S) theory. SVDD was used to assess the performance according to the data from a 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 experiments,SVDD could reflect the performance degradation of equipment parts,the results using D-S theory accorded with the practical situation,and the algorithms could deal with the evident conflict problem effectively,it improved the accuracy and reliability of the assessment results.