|
Abstract: The influence of phase reference estimation is addressed
on the gearbox diagnosis . A method of phase estimation is developed
based on Wigner distribution without tachometer. The objective is to
supplement the current techniques of gearbox diagnosis based on time
synchronous average. The proposed method focuses on the fact that gear
local faults produce periodic local components in vibration signals.
Based on a simplified vibration signal model, an analytic processing is
proposed to describe the principle of the method. The technique is
validated using dataset from a gearbox testbed. The results show that
Wigner distribution is an effective tool for the phase estimation of
gearbox vibration signal.
Key words: Wigner distribution Phase estimation Fault diagnosis
Gearbox
CLC No: TH17
Received 20031122, received in
revised form 20040624
|