农机装备早期故障消除模型
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摘要
可靠性是现代农机装备市场竞争力的一个重要因素。为了消除农机装备的早期故障,提高其可靠性水平,提出了一种农机装备早期故障通用消除模型。首先,采用双重Weibull分段模型对农机装备浴盆曲线建立定量化模型,明确早期故障期与偶然故障期的分界点;然后,研究了早期故障的形成与消除机理,在此基础上建立起农机装备早期故障消除模型,并详述了可靠性设计分析层、可靠性试验层、早期故障消除层的具体内容和实施方法;最后,以小型联合收割机为例证明了该模型的适用性与有效性。
Reliability is an important factor in market competitiveness of the agricultural equipment. To eliminate the early failures and improve the reliability of agricultural equipment,the general model of eliminating early failures for agricultural equipment is proposed in this paper. Firstly,Weibull two-fold mixture model is chose to establish the bathtub curve model of agricultural equipment,and division between early failure phase and normal operation phase is identified.Secondly,the formation of early failures and mechanism of early failures elimination are studied,and a model of eliminating early failures for agricultural equipment is established,with some detailed process and implementation of reliability analysis layer,reliability test layer and early failures elimination layer. Finally,an example of small-scale combine harvester is shown to illustrate the applicability and validity of the model.
Reliability is an important factor in market competitiveness of the agricultural equipment. To eliminate the early failures and improve the reliability of agricultural equipment,the general model of eliminating early failures for agricultural equipment is proposed in this paper. Firstly,Weibull two-fold mixture model is chose to establish the bathtub curve model of agricultural equipment,and division between early failure phase and normal operation phase is identified.Secondly,the formation of early failures and mechanism of early failures elimination are studied,and a model of eliminating early failures for agricultural equipment is established,with some detailed process and implementation of reliability analysis layer,reliability test layer and early failures elimination layer. Finally,an example of small-scale combine harvester is shown to illustrate the applicability and validity of the model.
引文
[1]周晨,林卫国,郑相周,等.基于关键质量特性的农机零部件可靠性优化设计[J].农业现代化研究,2016,37(2):402-408.
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[3]Birolini A.Reliability engineering-theory and practice[M].3rded.Berlin:Springer,1999.
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[5]Wang Z M,Yang J G,Wang G Q,et al.Application of three-parameter Weibull mixture model for reliability assessment of NC machine tools:a case study[J].Journal of Mechanical Engineering Science,2011,225(11):2718-2726.
[6]张根保,葛红玉,刘佳,等.可靠性驱动的装配过程建模及预测方法[J].计算机集成制造系统,2012,18(2):349-355.
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[8]Yeo K P.Planning step stress life test with a target acceleration factor[J].IEEE Transactions on Reliability,1999,48(1):61-67.
[9]陈循,张春华.加速试验技术的研究、应用与发展[J].机械工程学报,2009,45(8):130-136.
[10]Pecht M,Dasgupta A.Physics-of-failure:an approach to reliable product development[J].Journal of the Institute of Environmental Sciences,1995,38(5):30-34.
[2]王艳芳.基于bootstrap法与混合威布尔分布的拖拉机可靠性评估模型与应用研究[D].哈尔滨:东北农业大学,2016.
[3]Birolini A.Reliability engineering-theory and practice[M].3rded.Berlin:Springer,1999.
[4]Harold A.Different insights for improving part and system reliability obtained from exactly same DFOM“failure numbers”[J].Reliability Engineering and System Safety,2007,92(5):552-559.
[5]Wang Z M,Yang J G,Wang G Q,et al.Application of three-parameter Weibull mixture model for reliability assessment of NC machine tools:a case study[J].Journal of Mechanical Engineering Science,2011,225(11):2718-2726.
[6]张根保,葛红玉,刘佳,等.可靠性驱动的装配过程建模及预测方法[J].计算机集成制造系统,2012,18(2):349-355.
[7]Zio E.Reliability engineering:Old problems and new challenges[J].Reliability Engineering&System Safety,2009,94(2):125-141.
[8]Yeo K P.Planning step stress life test with a target acceleration factor[J].IEEE Transactions on Reliability,1999,48(1):61-67.
[9]陈循,张春华.加速试验技术的研究、应用与发展[J].机械工程学报,2009,45(8):130-136.
[10]Pecht M,Dasgupta A.Physics-of-failure:an approach to reliable product development[J].Journal of the Institute of Environmental Sciences,1995,38(5):30-34.