RU2013113452A - METHOD FOR DIAGNOSTIC OF THE MECHANISM BY THE PROPERTIES OF A WAVE BY DEFORMATION OF ITS NODE - Google Patents

Abstract

The diagnostics of the mechanism, which consists in the fact that the deformation wave propagates from the exciting forces of the node γ = f (τ) in the elastic medium of the mechanism, according to which the amplitudes of the harmonics of the Fourier series of the periodic functions γ = f (τ) for the excitation frequency f, is equal to A ( A = A = ... = A) = const, since the wave propagation velocity in an elastic linear medium does not depend on frequency, and the property A = const means that their average stationary function and diagnostic parameter for γ = f (τ) with high accuracy and resolution, and the diagnostics of the node prov according to the parameter-harmonic parameters A≥A with the number k (5≤k≤n), at the excitation frequency f in one operating mode of the node for the entire range of measurement frequencies (i = 1, 2, ... n), and the obtained values of A are compared with the values of their standard A = (A ± tσ) along the upper A≥ (A + tσ) · 0.94 and lower A≤ (А-tσ) · 1.06 boundaries, where t is the confidence coefficient, σ is the mean square deviation of the mean value over m ≥5 mechanisms, and with experiment m = 1, you can take Adl to start operation.

Claims (1)

The diagnostics of the mechanism, which consists in the fact that the deformation wave propagates from the exciting forces of the node γ = f _i (τ) in the elastic medium of the mechanism by which the amplitudes of the harmonics of the Fourier series of the periodic functions γ = f _i (τ) for the excitation frequency f _i are equal to A _i (A ₁ = A ₂ = ... = A _n ) = const, since the wave propagation velocity in an elastic linear medium does not depend on the frequency, and the property A _i = const means that their average $$A_{\mathrm{from}R.n}=\frac{\mathrm{one}}{n}{\displaystyle \sum _{i=\mathrm{one}}^{n}Ai=const}$$

- stationary function and diagnostic parameter for γ = f _i (τ) with high accuracy and resolution, and the node diagnostics is carried out according to the parameter $$A_{\mathrm{from}R.k}=\frac{\mathrm{one}}{k}{\displaystyle \sum _{j=\mathrm{one}}^{k}Aj}$$

by harmonics A _j ≥A _cp.n with the number k (5≤k≤n), at the excitation frequency f _i in one node operation mode for the entire range of measurement frequencies (i = 1, 2, ... n), and the obtained values A _{cp.k is} compared with the values of their standard A _e = (A _cp.k ± tσ _Acp.k ) along the upper A _cp.k ≥ (A _{cf. k} + tσ _Acp.k ) · 0.94 and the lower A _cf.k ≤ (A _cf.k -tσ _Acp.k ) · 1.06 boundaries, where t is the confidence coefficient, σ _Acp.k is the _root -mean-square deviation of the mean value for m≥5 mechanisms, and in experiment m = 1 we can take A _e to start operation.