浅析影响数控车床加工精度的因素-数控机床市场网 关键词：机床误差；系统误差；随机误差； [gap=485]Key words: the machine tool deviation, the system deviation,the random deviation
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Based on discrete random vibration theory, recursive square equations to calculate the mean and standard deviation of response are developed.
在此基础上采用随机振动的离散分析理论，推导出结构响应均值和方差的递推式。
The mean sensitivity coefficient and the standard deviation sensitivity coefficient are strongly related and both can be used to identify key contributing random variables.
变量的均值敏感性因子和标准差敏感性因子是高度相关的，都可以用来识别最敏感的随机变量。
The manufacturing deviation of grids structures was assumed to be in normal distribution, and the normal random sampling was realized by acceptance-rejection method.
假定网架结构制作偏差近似服从正态随机分布，利用舍选法实现了正态随机变量的抽样。
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