Numerical control machine tool thermal error real-time compensation modeling method based on time series algorithm

A technology of numerical control machine tools and time series, applied in the direction of program control, computer control, simulators, etc., can solve the problems that the mathematical model cannot achieve the compensation effect, it is difficult to guarantee the accuracy of the model, and the processing accuracy is difficult to guarantee, so as to improve the modeling accuracy and practicality, reducing complexity, and reducing hardware costs
CN102736558AInactive Publication Date: 2012-10-17上海睿涛信息科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
上海睿涛信息科技有限公司
Publication Date
2012-10-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a numerical control machine tool thermal error real-time compensation modeling method based on a time series algorithm, which belongs to the technical field of precision machining. The method comprises the steps of (1) carrying out data zero mean pretreatment, namely employing an inverted sequence test method and a kurtosis and skewness test method to judge the stationarity and the normality of the data; (2) using an autocorrelation function, a partial correlation function, and the censored results as judgment criteria to carry out the pattern recognition of a thermal error mathematical model; (3) employing a least square estimation method or a long autoregressive residual calculating method to realize the parameter estimation of the thermal error mathematical model; (4) determining the order of the thermal error mathematical model, namely employing a judgment method that combines an AIC order determination criterion, an F test order determination criterion, and a whiteness test order determination criterion to realize the order determination of the thermal error mathematical model; (5) and carrying out integration processing of synthesizing judgment conditions, namely constructing a complete forecasting mathematical model formula. The modeling method provided by the invention has the advantages that less hardware is required, the applicability is wide, and the established model has high prediction precision and reliability.
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Description

technical field

[0001] The invention relates to a thermal error compensation modeling method in the technical field of precision machine tool processing, in particular to a real-time compensation modeling method for numerical control machine tool thermal error based on a time series algorithm. Background technique

[0002] After years of development, the domestic CNC machine tool industry has made great progress in production scale, and has successfully entered the ranks of the machine tool production countries. At present, the CNC machine tools produced in my country account for about 35% of the domestic CNC machine tool market share, but they are mainly concentrated in the low-end and low-end markets, while the high-end CNC machine tool market is mostly occupied by imported machine tools, especially in the high-end market. In the field of CNC machine tools, the market share of domestic machine tool products only accounts for about 4%. As the current industrial products are...

Claims

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