SU560188A1 - Phase spectrum analyzer for machine tools - Google Patents

Description

Clouds 2, mixer 3, low pass filter 4, divider krait frequency 5, power amplifier 6, vibrator 7, measuring transducer of exciting force 8, uiruguyu system of the machine 9, measuring transducer of vibration movement 10, divider of multiple frequencies , narrow-band filters 14 and 15, output device 16, divider of the critical frequencies 17, phase meter 18.

The dialyzer works as follows.

The signal from the fixed frequency oscillator 1 is shifted with the generator oscillator frequency 2 with frequency on mixer 3. Filter 4 separates the frequency / o-co component and divides by frequency in a divisor of multiple frequencies 5 by the number n equal to the harmonic curvature iomer to be studied. The output voltage of the divider 5, having a frequency

/about-"

amplified by power amplifier 6 and fed to the input of the vibrator 7 of the excitation force recorded by the measuring generator 8 at the input of the elastic system of the machine 9. The signal of the vibratory movement at the output of the flock 9 is recorded by the measuring generator 10. complex signal and contains harmonic

/OK ,

frequency components

where K is the harmonic number, integers. The signal from the output of the measuring transducer .. / o - l 8 with frequency

and enters the input snoop

system 12. The other input of the mixer 12 receives the voltage from the output of the divider of multiple frequencies 11 frequencies -. In this case, Ia vyhohop

The mixer 12 forms a differential and total mixing frequencies. Total tea fo - / o

is equal to 1 -,

ppp

highlighted by filter 14.

The signal from the output of the measuring converter 10 is supplied to the input of the balanced mixer 13, to the other input of which the generator 2 voltage is applied. The output of the mixer 13 is a filter 15, separating the total frequency offset equal to the value of / 0. Then from the output of the filter 15, the signal frequency / o is fed to the divider 17, from the output

divider 17 signal with frequency - arrives

to the input of the phase meter 18. Pa 15k ;; s of the phase meter 18 comes from the outputs of the filters 14 and 15 signals of the same frequency, but shifted in phase. The phase shift is due to the appearance of phase additions in the harmonics of the excited signal in the non-linear machine system of the machine. The amplitude p of a multiple harmonic excited in a nonlinear elastic machine system is measured by instrument 16. Thus, the analyzer measures the amplitude and phase of multiple harmonics, i.e., it allows analysis of the spectrum of amplitudes and phases of oscillations of the machines.

Claims (2)

1.Vavilov A. A., Solodovnikov A. I. Experimental determination of frequency characteristics of automatic systems. M.-L., 1963. 2. The patent of England No. 1256079, cl. G 01N, 1969.