Fault diagnosis method under action of central frequency convergence trend
A center frequency and fault diagnosis technology, which is applied in the testing of mechanical components, testing of machine/structural components, measuring devices, etc., can solve problems such as the difficulty in the number of modal components and the difficulty in predicting the actual center frequency of equipment, and achieve The effect of accelerating the convergence process, reducing the amount of calculation, and reducing the difficulty
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[0055] This embodiment provides a fault diagnosis method under the action of the center frequency convergence trend guided by the center frequency convergence trend, refer to figure 1 As shown, the method includes the following steps,
[0056] (1) With the help of dynamic signal sensor to f s A set of damage dynamic signals x(t) of gearboxes is collected for the sampling frequency, and its waveform diagram refers to Figure 4 shown.
[0057] (2) Set the initial decomposition parameters of the variational model: set the initial center frequency ω 0 is 0, the initial center frequency growth step Δω is 100Hz, the initial step count z is 1, the balance parameter α is [1000, 4000], and the number of modal components K is 1.
[0058] (3) Decompose the dynamic signal x(t) once using the variational model with initial decomposition parameters, judge the convergence trend of the center frequency, and iteratively decompose the dynamic signal x(t) through the signal analysis frequency...
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