Based on the randomicity of the alignment errors , the method called " pseudo random number " is presented to simulate pseudo alignment errors . the theory of producing pseudo random number has been studied systematically . the method above - developed can be used to simulate pseudo alignment errors , and an example illustrates the method 分析了安装误差对结构/机构的影响,针对安装误差随机性的特点提出了用伪随机数生成的方法来模拟产生“伪安装误差”的思想;全面系统地研究了伪随机数的产生理论和方法,同时阐述了安装误差的统计原理;开发了一个能够用于模拟产生伪安装误差的应用软件,并给出了安装误差模拟的算例。