Filter system and method

Abstract

The present application provides a filter system, comprising a hardware filter circuit and a processor connected with the hardware filter circuit. With the filter system provided in the present application, the whole filtering process is accomplished by initially performing the low-pass filtering of first preset frequency-band signals with the hardware filter circuit for the signals to be filtered, reducing the frequency bands entering the processor and then continuing to perform the filtering of second preset frequency-band signals for signals by the processor according to second preset frequency-band signal filtering conditions. During that process, since the hardware filter circuit filters the signals to be filtered, enabling the frequency bands of the first filter signals entering the processor to meet the requirements of less and lower frequency bands, filtering that meets the accuracy requirement can be achieved by only processing the signals of less frequency bands by the processor. It has small data processing amount in the whole filter system, is shorter in time used for computing and is advantageous for the subsequent analytical apparatus to analyze the operation status of train body in time, to meet the high real-time demands of in-situ application and to ensure the operation security of train.

Description

technical field [0001] The present invention relates to the field of signal processing, and more specifically relates to a filtering system and method. Background technique [0002] During the operation of the train, due to the uneven track and other reasons, the wheels of the train will appear snaking motion. The wheels shake left and right in the track and run forward according to a certain amplitude. The wavelength λ of the snaking motion is marked in the figure. The frequency of the snaking motion proportional to the running speed of the train also increases accordingly. The closer the frequency is to the natural vibration frequency of the wheel set, the easier the snaking motion of self-excited vibration occurs. When the running speed of the train reaches the critical speed, once the serpentine motion occurs, no matter whether the train speed remains constant or continues to increase, the amplitude of the serpentine motion will gradually increase, causing lateral instab...

AI Technical Summary

Problems solved by technology

[0008] In view of this, the present invention provides a filtering system and method, which solves the problem of time delay caused by the large amount of data calculation caused by software filtering in the prior art

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