Minimum frequency is less consistent than
characteristic frequency, because if there is a significant droop, or tail, after the
characteristic frequency point, the extent to which this is detected becomes highly dependent on the distance to the bat.
In this case, the
characteristic frequency [[omega].sub.max] is expressed as [2]
The conclusion (3) shows that the
characteristic frequency [f.sub.T] of fault line is larger than the [f.sub.T] of healthy line in this fault condition.
Because [[omega].sub.c] = 1 / [tau] the
characteristic frequency can be obtained and plugged into Eq.
If the broken bar fault is present, a pulsation is present in the modulus of the analytic signal, with the
characteristic frequency of the machine fault:
Step 4: Applying spectrum analysis to the instantaneous amplitude of PF component including dominant feature information and extracte the fault
characteristic frequency of the roller bearing.
In optimal-slip-estimation module, based on the real speed, the inverter excitation frequency, and torque-speed characteristic curve of squirrel-cage motor with different load types, the motor slip is calculated and the consequent optimal slip estimation value is transmitted to fault
characteristic frequency determination module, where characteristic frequencies of broken rotor bars are calculated.
In this case, the effective plasma frequency is redefined as a
characteristic frequency at which [epsilon.sub.eff] (w) = 0.
The scientists determined the
characteristic frequency with which very cold magnesium atoms can be excited to a particular long-lived state, by a measurement from PTB via 73 km optical fiber.
Using intensity of increased amplitudes on
characteristic frequency components interval of influence factors and frequency of mentioned defects was obtained.
Another instrumentation characteristic that comes into the model is a
characteristic frequency of the sensor.