測(cè)量?jī)x器校準(zhǔn)間隔的灰色非等時(shí)距預(yù)測(cè)
中國(guó)測(cè)試雜志
孫 群1, 趙 穎1, 王國(guó)華2
(1. 聊城大學(xué)汽車與交通工程學(xué)院,山東 聊城 252059; 2. 北京航空航天大學(xué)儀器科學(xué)與光電工程學(xué)院,北京 100191)
摘 要:針對(duì)測(cè)量?jī)x器經(jīng)優(yōu)化后的校準(zhǔn)間隔呈現(xiàn)非等時(shí)距的特點(diǎn),提出一種灰色非等時(shí)距校準(zhǔn)間隔預(yù)測(cè)方法。通過(guò)分析歷史校準(zhǔn)數(shù)據(jù)的特征,建立校準(zhǔn)數(shù)據(jù)的數(shù)學(xué)描述模型。考慮到歷史校準(zhǔn)數(shù)據(jù)小樣本、非線性的特點(diǎn),采用灰色新陳代謝非等時(shí)距GM(1,1)預(yù)測(cè)模型,預(yù)測(cè)測(cè)量?jī)x器的非等時(shí)距校準(zhǔn)間隔。實(shí)驗(yàn)表明:灰色新陳代謝非等時(shí)距GM(1,1)模型克服了隨機(jī)擾動(dòng)對(duì)系統(tǒng)的影響,更能反映系統(tǒng)的變化趨勢(shì),適用于測(cè)量?jī)x器非等時(shí)距校準(zhǔn)間隔的預(yù)測(cè)。
關(guān)鍵詞:測(cè)量?jī)x器;校準(zhǔn)間隔;預(yù)測(cè);非等時(shí)距;灰色理論
中圖分類號(hào):TP801.6;TM930.113;O213.1;O232 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1674-5124(2013)03-0014-03
Prediction of calibration interval for a measuring instrument using non-equidistance
grey model
SUN Qun1, ZHAO Ying1, WANG Guo-hua2
(1. School of Automobile and Transportation Engineering,Liaocheng University,Liaocheng 252059,China;
2. School of Instrumentation Science & Opto-electronics Engineering,Beihang University,Beijing 100191,China)
Abstract: After the calibration interval of a measuring instrument was optimized, the historical calibration data sequence was non-equidistance. Therefore, traditional calibration interval prediction models based on equal sequence could not be applied again. This article proposed the modeling thought of calibration interval prediction by analyzing characters of historical calibration data and building the mathematical model of calibration data. Based on this work, a renewal non-equal GM(1,1) model was proposed. Experiments showed that the renewal non-equal GM(1,1) model conquered the effect of random disturbance and could be used to forecast the calibration interval of a measuring instrument.
Key words: measuring instrument; calibration interval; prediction; non-equidistance; grey theory