细胞分析仪取液系统的改进型FORM算法可靠性评估  

Reliability Evaluation of Cell Analyzer Liquid Extraction System Based on Improved FORM Algorithm

作　　者：姜振海[1,2] 黄炜祺 谷东伟 郭训薇[1] JIANG Zhen-hai;HUANG Wei-qi;GU Dong-wei;GUO Xun-wei(School of Mechanical and Electrical Engineering,Changchun University of Technology,Jilin Changchun 130012,China;Nanjing Huaqun Photoelectric Technology Co.,LTD,Nanjing Jiangsu 210000,China)

机构地区：[1]长春工业大学机电工程学院,吉林长春130012 [2]南京华群光电技术有限公司,江苏南京210000

出　　处：《机械设计与制造》2022年第4期293-298,303,共7页Machinery Design & Manufacture

基　　金：吉林省长春市科技计划项目(16CX06)。

摘　　要：加速寿命试验是设备系统可靠性分析的重要方法,如何进行加速寿命试验以及在少量数据样本状态下进行精确的可靠性评估是亟待解决的问题。本文在采用逆幂律加速模型的基础上运用ADAMS对细胞分析仪取液系统机械传动结构进行仿真。在确定易失效部件自身所能承受的最大应力条件下,利用ADAMS分析方法来获得故障数据并通过改进型FORM算法进行可靠性评估,进一步确定故障数据的极限状态函数曲线并获得验算点。通过对极限状态函数曲线及验算点的Nataf空间变换,促使维度降低并获取验算点的精确位置。利用Newton迭代方式以及MC抽样原理计算并修正可靠度值,通过对比发现,在相同数量的样本状态下评估可靠度同比LD-FORM算法提高了2.7%,在数量小于MC算法的样本状态下,比MC算法的可靠度提高了0.6%。Accelerated life test is an important method to analyze the reliability of equipment system.In this paper,based on the inverse power law acceleration model,ADAMS is used to simulate the mechanical transmission structure of the liquid extraction system of the cell analyzer.Under the condition of determining the maximum stress that the vulnerable parts can bear,the ADAMS post-processing analysis method is used to obtain the fault data and the improved FORM algorithm is used for reliability evaluation,so as to further determine the limit state function curve of the fault data and obtain the checking point.By Nataf space transformation of limit state function curve and checking point,the dimension is reduced and the exact position of checking point is obtained.By using Newton iteration method and MC sampling principle,the reliability value was calculated and modified.Through comparison,it was found that the reliability of the ld-form algorithm was improved by 2.7% compared with that of the ld-form algorithm when the number of samples was the same,and the reliability of the ld-form algorithm was improved by 0.6% when the number of samples was smaller than MC algorithm.

关 键 词：改进型FORM算法 加速寿命试验 可靠性评估 ADAMS 极限状态函数 

分 类 号：TH16[机械工程—机械制造及自动化] TH17