Error Morrection Method for Secondary Temperature Instruments Based on ARIMA-GM(1,1)Model
the problem of undetectable errors in secondary temperature instruments for chemical equip-ment during ultra-high temperature stages,this paper proposed a temperature error correction method based on ARIMA-GM(1,1)model.Firstly,put the secondary temperature instrument and standard in a stable environment,and calculate the error between the standard and secondary instrument by out-putting electrical signals from the standard instrument;Secondly,an ARIMA model was established through error sequences to obtain a set of predicted values;Then,the residual between the actual error and the predicted value is calculated,to improve the prediction accuracy of the ARIMA model,the tail data of the residual sequence is truncated to establish a GM(1,1)correction model;Finally,the ARI-MA model was combined with the GM(1,1)model to establish an ARIMA-GM(1,1)correction mod-el,which predicts the possible errors of the instrument in the next stage and realizes the self-correction function of the secondary temperature instrument.Comparative experiments have shown that the ARI-MA-GM(1,1)model proposed in this paper has the lowest relative average error,higher prediction ac-curacy,and can better predict the possible errors of the instrument in the next stage,and this method provided a scientific basis for the self-correction of subsequent instruments.
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