Abstract
In auto safety components crash test, noise and interference signals is inevitable in the collected physical data, which will seriously affect the accuracy of the data. In this paper, the advantages and disadvantages are compared between IIR filters and FIR filters, a Butterworth filter is designed using the impulse response invariant method, and a filtering software is developed to meet the need of data processing for different measurement projects. The results showed that: according to different test data, the filter can achieve CFC filtering of different frequency levels, exclude interference data, preserve useful information, which ensures data accuracy and reliability, provides a convenient for the following data processing.
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