Method for processing metal cutting simulation data

Method for processing metal cutting simulation data

  • CN 103,823,933 A
  • Filed: 02/26/2014
  • Published: 05/28/2014
  • Est. Priority Date: 02/26/2014
  • Status: Active Application
First Claim
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1. a disposal route for metal-cutting artificial data, is characterized in that step is as follows:

  • (1) data filtering based on statistical study, rejects obvious exceptional value on curve, reduces the impact of exceptional value on overall data(1) statistical hypothesis;

    the foundation of estimating variable probability density curve as variable distribution pattern, establish the steady state data Normal Distribution of got period, average and standard deviation by maximum-likelihood method to these group data are estimated;

    (2) test of hypothesis;

    test of hypothesis is divided into distributional pattern check and parametric test, adopts Lilliefors method of inspection to carry out distributional pattern check, adopts U method of inspection to carry out parametric test to average μ and

    standard deviation sigma;

    (3) data filtering;

    according to the rejecting abnormal data method of normal distribution, adopt " 3 σ

    " criterion to carry out data filtering to sample, between filtrating area (μ

    -3 σ

    , μ

    +3 σ

    ), reject the abnormal data dropping on outside interval;

    After rejecting, equally the data after filtering are carried out to test of hypothesis, if the result can accept, just complete the rejecting step of abnormal data;

    If the result is unacceptable, continue it to carry out abnormal data filtration, until the result can be accepted;

    (2) data de-noising based on wavelet analysisFirst use small echo '"'"' db3 '"'"' to carry out one dimension multi-scale Wavelet Analysis to data, return signal is in the wavelet decomposition of N layer;

    Then carry out single reconstruct based on wavelet decomposition structure by one dimension wavelet coefficient, calculate reconstruction coefficient vector at N layer.

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