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液壓泵可靠性短時(shí)試驗(yàn)方法研究
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國(guó)家自然科學(xué)基金項(xiàng)目(51405424)


Short-time Test Method of Reliability for Hydraulic Pumps
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    摘要:

    液壓泵屬于高可靠長(zhǎng)壽命產(chǎn)品,其可靠性對(duì)整機(jī)的可靠性和工作性能有著至關(guān)重要的影響,,即使經(jīng)過長(zhǎng)時(shí)間的加速壽命試驗(yàn)仍可能出現(xiàn)無失效的情況,,給液壓泵可靠性評(píng)估帶來了困難,。針對(duì)傳統(tǒng)的可靠性評(píng)估局限性,,以容積效率退化數(shù)據(jù)為基礎(chǔ),,應(yīng)用非線性最小二乘法和最優(yōu)化理論進(jìn)行液壓泵性能參數(shù)退化軌跡研究,,提出了液壓泵可靠性短時(shí)試驗(yàn)方法,,將短時(shí)試驗(yàn)與可靠性壽命試驗(yàn)特征參數(shù)對(duì)比,,證實(shí)了該方法的準(zhǔn)確性和有效性,。

    Abstract:

    Hydraulic pumps belong to high reliability and long life product, its reliability has a critical influence on the reliability and performance of whole machine. After a long accelerated life test, it may still be nonfailure for high reliability and long life products, which makes it difficult to assess reliability. Aiming at the limitation of the traditional reliability assessment techniques, the reliability of the hydraulic pumps shorttime test method was proposed, which based on performance degradation theory to predict the reliability and residual life of products. To establish residual life prediction model for hydraulic pumps, based on the volumetric efficiency data, the nonlinear leastsquare method was adopted to fit time series, simultaneously, the optimum path search algorithm was built to select the best degradation path. The consistency check of the data in prediction model and the stepstress reliability life test were done by using nonparametric statistical theory, and the overall sample life distribution function was constructed with Monte Carlo numerical simulation method. The results show that the simulation data of fault sample distribution are consistent with stepstress reliability life values. Comparing the test parameters curves of the shortterm test with stepstress accelerated life test, the correctness and feasibility of the shorttime test method are further verified.

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郭銳,石玉,趙靜一,王萍,寧超.液壓泵可靠性短時(shí)試驗(yàn)方法研究[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2016,47(3):405-412. Guo Rui, Shi Yu, Zhao Jingyi, Wang Ping, Ning Chao. Short-time Test Method of Reliability for Hydraulic Pumps[J]. Transactions of the Chinese Society for Agricultural Machinery,2016,47(3):405-412.

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  • 收稿日期:2015-09-01
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  • 在線發(fā)布日期: 2016-03-10
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