Much of the superior performance of DREAM™ may can be
attributed to the methods it uses to control the content of the envelope
spectrum data. DREAM controls the relative sensitivities of bearing's friction
forces and impact forces and the effective bandwidth of the measurement system
by selecting specific bandpass filters applied to the input data before
demodulation using criteria based on bearing's dimensions and shaft rotating
frequencies. DCFIL generates the filters specified by DREAM, processes the input
data, automatically removes interfering signals from the data before the data is
demodulated, and then does the remaining demodulation and other signal
processing necessary for DREAM. In most cases, DCFIL also controls the
measurement hardware, although it may also be used to process previously
collected time domain data.
Typical filter specified by DREAM and implemented with
DCFIL.
Typical filter specified by DREAM and implemented with
DCFIL and automatically modified to remove interference from other
machine sources.