Study of Operational Reliability Assessment Method Based on Devices Operating Information

Abstract

The equipment operational reliability evaluation is very important for working safely. The traditional reliability evaluation methods couldn’t meet the demands. In order to consider the detection information during the operation from devices, the operational reliability assessment method based on information entropy and empirical mode decomposition (EMD) is proposed. First, the equipment operation detected signals’ multiple intrinsic mode functions (IMF) are obtained by using EMD ; then the relative energy of each intrinsic mode functions are calculated and their information entropy are normalized. Finally the operational reliability of equipment operating status can be judged according to the normalization information entropy value. The method is used for a rotor test analysis considering of the degree of injury. The results demonstrated the method effectively, which provided an effective method for assessing the running reliability of mechanical equipment with less sample data.