Bootstrap法的拖拉机故障规律性研究

发布时间：2018-01-12 07:13

本文关键词：Bootstrap法的拖拉机故障规律性研究　出处：《机械设计与制造》2016年02期 　论文类型：期刊论文

【摘要】：进行拖拉机故障跟踪试验,得到拖拉机运行现场故障数据。基于随机过程理论,用非齐次泊松过程构建故障强度函数的数学模型。应用Bootstrap自助抽样方法,构建故障强度模型的参数估计与非参数估计方法。结合故障跟踪试验数据,得到拖拉机使用初期的故障强度曲线,揭示了使用初期拖拉机的故障规律性。对比参数估计与非参数估计两种方法,计算累积故障强度与实际累积故障次数之间的均方误差,得出非参数估计的故障强度曲线更接近试验的实际过程。研究方法与结果为进一步提高拖拉机可靠性及精益性设计提供了理论指导。
[Abstract]:Based on the random process theory, the fault data of tractor running field are obtained through the tractor fault tracking test. The mathematical model of the failure strength function is constructed by using the nonhomogeneous Poisson process, and the Bootstrap self-help sampling method is applied. The method of parameter estimation and non-parameter estimation of the fault strength model is presented. Combined with the data of the fault tracking test, the fault strength curve of the tractor at the initial stage of use is obtained. The fault regularity of the tractor in the initial stage is revealed and the mean square error between the cumulative fault intensity and the actual cumulative fault number is calculated by comparing the two methods of parameter estimation and nonparametric estimation. It is concluded that the non-parametric estimation of the failure intensity curve is closer to the actual process of the test. The research method and results provide theoretical guidance for further improving the reliability and lean design of the tractor.
【作者单位】：东北农业大学工程学院;黑龙江科技大学管理学院;
【基金】：国家自然科学基金项目(71171044)
【分类号】：S219.07
【正文快照】： 1引言农业机械的可靠性对抢农时、保季节、夺丰收等起到关键作用,对全年收益有重要影响。为了适应农业发展现状,农业机械产品不断发展变化,产品功能不断完善的同时,结构日益复杂化,会潜在发生较多故障的可能性。目前我国一些农业机械的平均无故障工作时间仅为(20~30)h,可靠性

【相似文献】