|
Abstract: In order to confirm the statue of the power fluid system
for proactive maintenance, a new method is introduced to detect the weak
pulse amplitude of particle signal buried in noise based on matched
filter theory. Its principle and the method with which to determine the
filter coefficient when it is used for detecting signal amplitude is
discussed. Generalized matched filter is designed through analyzing the
property of the measuring system. The result shows this method is simple
and has less computational complexity. The weak particle signal not only
can be reliably extracted from heavy noise, but also its amplitude can
be recovered satisfactorily, the precision and on-line monitoring
ability of the measuring system is effectively improved using this
method.
Key words: Proactive maintenance Design of matched filter Fluid
contamination monitoring
CLC No: TH137
Received 20020528, received in revised form 20021120
|