关键词: 机械学, 齿轮箱, 故障诊断, 盲源分离, 复合故障, 核

Abstract: Aiming at the shortage of the blind source separation（BSS）in processing non-linear compound fault signals, the kernel independent component analysis（KICA）was used in the performance test and fault diagnosis for the gearbox. The principle of KICA was introduced and then illustrated with simulations. Finally，combined with envelope order spectrum analysis, this method was used to diagnose the gearbox with two types of faults. The fault characteristics were found out, and the faults were distinguished successfully.

Key words: mechanics, gearbox, fault diagnosis, blind source separation, compound fault, kernel independent component analysis