Envelopment Analysis and Its Applicationin the Fault Diagnosis

Aim To show the methods of envelopment analysis and to prospect application in the fault diagnosis. Methods The envelopment methods and the characteristic analysis methods based on the envelopment have been summarized, and the diagnosis system based on the envelopment has been built. Results and Conclusion Envelopment analysis has obvious significance for the equipment fault diagnosis with modulation and vibration in the practice application.