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基于多场耦合建模与Bootstrap方法的滑环可靠性评估

刘贤军 孙远航 王永松 施英莹 孙习武 余建波

刘贤军, 孙远航, 王永松, 等 . 基于多场耦合建模与Bootstrap方法的滑环可靠性评估[J]. 北京航空航天大学学报, 2019, 45(11): 2301-2311. doi: 10.13700/j.bh.1001-5965.2019.0106
引用本文: 刘贤军, 孙远航, 王永松, 等 . 基于多场耦合建模与Bootstrap方法的滑环可靠性评估[J]. 北京航空航天大学学报, 2019, 45(11): 2301-2311. doi: 10.13700/j.bh.1001-5965.2019.0106
LIU Xianjun, SUN Yuanhang, WANG Yongsong, et al. Reliability evaluation of slip ring based on multi-field coupling modeling and Bootstrap method[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(11): 2301-2311. doi: 10.13700/j.bh.1001-5965.2019.0106(in Chinese)
Citation: LIU Xianjun, SUN Yuanhang, WANG Yongsong, et al. Reliability evaluation of slip ring based on multi-field coupling modeling and Bootstrap method[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(11): 2301-2311. doi: 10.13700/j.bh.1001-5965.2019.0106(in Chinese)

基于多场耦合建模与Bootstrap方法的滑环可靠性评估

doi: 10.13700/j.bh.1001-5965.2019.0106
基金项目: 

国家自然科学基金 71777173

集团公司重大工艺专项研究项目 ZDGY2016-15

详细信息
    作者简介:

    刘贤军  男, 硕士研究生。主要研究方向:质量与可靠性、摩擦学

    余建波  男, 博士, 教授, 博士生导师。主要研究方向:质量与可靠性、设备智能维护、生产与服务系统设计

    通讯作者:

    余建波. E-mail:jbyu@tongji.edu.cn

  • 中图分类号: V240.2

Reliability evaluation of slip ring based on multi-field coupling modeling and Bootstrap method

Funds: 

National Natural Science Foundation of China 71777173

Major Process Special Research Project of Group Company ZDGY2016-15

More Information
  • 摘要:

    导电滑环作为卫星太阳电池矩阵驱动机构的核心部件,其可靠性关系到卫星寿命的长短,由于空间用滑环寿命试验费用昂贵、试验周期长、样本数据量少等特点,无法获取大样本寿命数据,利用传统大样本数据进行统计推断,从而进行可靠性评估的方法存在困难。因此提出一种基于摩擦磨损模型的可靠性评估方法,应用赫兹理论、传热学方法分别计算摩擦副磨损过程中的接触区域变化和温度变化,量化热力电多场耦合对摩擦副磨损的影响,提出基于粘着磨损的多物理场耦合磨损模型,基于该模型得到的寿命数据,运用改进Bootstrap方法得到滑环寿命分布的参数估计,最后与传统可靠性预测方法结合,得到一系列滑环可靠性指标。方法对比结果表明,改进Bootstrap方法不仅具有较高的评估精度,还具有主观性小、适用性强的特点,由该方法所得的各可靠性指标均符合工程实际,具有很强的工程应用价值。

     

  • 图 1  滑环可靠性评估流程图

    Figure 1.  Reliability evaluation flowchart of slip ring

    图 2  触头表面电镜形貌图

    Figure 2.  Contact surface morphology by electron microscopy

    图 3  试验结果与模型结果对比图

    Figure 3.  Comparison between test results and model results

    图 4  模型寿命分布图

    Figure 4.  Life distribution of model

    图 5  尺度参数η概率密度分布

    Figure 5.  Probability density curves of scale parameter η

    图 6  形状参数m概率密度分布

    Figure 6.  Probability density curves of shape parameter m

    图 7  滑环概率密度函数曲线

    Figure 7.  Probability density function curve of slip ring

    图 8  滑环可靠度函数曲线

    Figure 8.  Reliability function curve of slip ring

    图 9  滑环失效率函数曲线

    Figure 9.  Failure rate function curve of slip ring

    图 10  不同方法的估计结果

    Figure 10.  Estimation result of different methods

    表  1  滑环跑合试验参数

    Table  1.   Running-in test parameters of slip ring

    参数 数值
    大气跑合 真空跑合
    温度 常温 (20±5)℃
    湿度 相对湿度不大于50% 真空
    压力 常压 真空度优于1×10-3Pa
    通电情况 功率环和信号环全部通0.25A 功率环通7A,信号环通0.25A
    跑合速度 2r/min 0.3r/min
    跑合时长 正反转各跑合24h 累计运转5万转
    下载: 导出CSV

    表  2  模型部分输入参数

    Table  2.   Some of model input parameters

    参数 设定值
    接触载荷 0.17~0.20N
    功率电流 7A
    汇流盘电阻率 1.65×10-8Ω·m
    旋转半径 6.5cm
    信号电流 0.25A
    汇流盘角速度 0.6πrad/min
    下载: 导出CSV

    表  3  分布假设检验结果

    Table  3.   Test results of distribution hypothesis

    分布类型 h p k c
    威布尔分布 0 0.8449 0.1596 0.3614
    正态分布 0 0.8398 0.1606 0.3614
    下载: 导出CSV
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  • 收稿日期:  2019-03-18
  • 录用日期:  2019-06-21
  • 刊出日期:  2019-11-20

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