航空计算技术
航空計算技術
항공계산기술
AERONAUTICAL COMPUTER TECHNIQUE
2014年
4期
91-93,98
,共4页
航空活塞发动机%大修成本预测%新陈代谢GM(1,1)模型%精度检验
航空活塞髮動機%大脩成本預測%新陳代謝GM(1,1)模型%精度檢驗
항공활새발동궤%대수성본예측%신진대사GM(1,1)모형%정도검험
aviation piston engine%overhaul cost prediction%metabolic GM(1,1) model%accuracy test
以某台Lycoming型航空活塞发动机2009年-2013年的大修费用为时间序列样本,对其进行准光滑检验和准指数规律检验,表明可以建立GM(1,1)模型。建立常规GM(1,1)模型,求得关联度、方差比、小误差概率等指标均为一级精度,但第7次预测的相对误差较大(5.22%)。为了得到较高预测精度,采用新陈代谢GM(1,1)优化模型,结果表明第7次预测的相对误差减小到0.18%,其余指标均保持一级精度。新陈代谢GM(1,1)模型适用于航空活塞发动机的大修成本预测。
以某檯Lycoming型航空活塞髮動機2009年-2013年的大脩費用為時間序列樣本,對其進行準光滑檢驗和準指數規律檢驗,錶明可以建立GM(1,1)模型。建立常規GM(1,1)模型,求得關聯度、方差比、小誤差概率等指標均為一級精度,但第7次預測的相對誤差較大(5.22%)。為瞭得到較高預測精度,採用新陳代謝GM(1,1)優化模型,結果錶明第7次預測的相對誤差減小到0.18%,其餘指標均保持一級精度。新陳代謝GM(1,1)模型適用于航空活塞髮動機的大脩成本預測。
이모태Lycoming형항공활새발동궤2009년-2013년적대수비용위시간서렬양본,대기진행준광활검험화준지수규률검험,표명가이건립GM(1,1)모형。건립상규GM(1,1)모형,구득관련도、방차비、소오차개솔등지표균위일급정도,단제7차예측적상대오차교대(5.22%)。위료득도교고예측정도,채용신진대사GM(1,1)우화모형,결과표명제7차예측적상대오차감소도0.18%,기여지표균보지일급정도。신진대사GM(1,1)모형괄용우항공활새발동궤적대수성본예측。
Using overhaul costs of one Lycoming aviation piston engine from 2009 to 2013 as a time series of sample,does quasi-smooth test and quasi-exponential test,the GM(1,1) model is applied for this da-ta sample.constructs conventional GM (1,1) model and does accuracy test.The results are that correla-tion,variance ratio,small error probability are first-class accuracy,however the relative error of the sev-enth forecasting is 5 .22%( more than 2%) ,the error is unacceptable .In order to get acceptable forecas-ting accuracy,constructs metabolic GM(1,1) model.The results from this optimized model forecasting are that the relative error of the seventh forecasting is 0.18%,and other accuracies are first-class.The meta-bolic GM(1,1) model is suitable for overhaul costs forecasting of aviation piston engine .